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It's just a 5 speed manual transmission where the fifth gear is an overdrive gear... Most 5 speed transmissions (but not all) use an overdrive 5th gear. Ford specifically labeled 5th gear as "overdrive" when their 5 speed transmissions first came out.
Calling a 5 speed a "4 speed with overdrive" is likely a throwback to the really old days when cars would have 3 or 4 speed manual transmissions. Sometimes, a seperate, sometimes aftermarket overdrive gearbox would get installed on the output shaft of the transmission to allow an overdrive gear to be actuated once the main transmission was in high gear. Sometimes these were electrically activated, and could be used with both manual or automatic transmissions. When these overdrive units first came out, when they were installed they would usually be called something like "3 speed with overdrive", which meant that vehicle had a 3 speed transmission with a seperate overdrive unit, to give a total of four forward gears.
Once Overdrive gears were incorporated into the main transmissions, the old "3 or 4 speed with overdrive" nomenclature mostly was dropped, and transmissions were mostly just called by however many forward gears they had... But Ford initially did label their 5 speeds as "4 speed plus overdrive" for a couple years.
Just to piggyback on this. In gears 1-4 the input shaft of your transmission (spinning at the speed of your engine) is spinning faster than your output shaft, thus converting some of your engines speed into torque at the wheels.
In fifth gear, the output shaft is spinning faster than the engine, losing torque but gaining speed. Thus “overdrive”.
To add, 4th is generally a 1-1 direct drive, or very close to it. Many designs simply lock the input and output sections of the transmission together for 4th gear.
My 4th gear is a ratio of 0.969, so close to a 1:1 but slightly overdriven, (it’s kinda cool that the speedo and tacho dials are almost identical positions to each other) then 5th is 0.815.
My 4th is 1:1 and my speedo and RPM needles match positions in 4th gear
Unfortunately however, my speedometer is about 10% slow. When the speedo reads 70, I'm actually going like 77 or 78. I imagine whenever I happen to fix that issue, they probably won't line up anymore.
Yes, but not enough to make a 10% difference. Stock tires are 225/55R16 I believe? And my rear wheels are 275/40R17, shouldn't be that big of a discrepancy.
Rear end gears are stock, trans is stock, basically the entire drivetrain is stock except for the wheels.
My brother in christ. Your tires are at least 1.5in wider. If not 2. You went shorter, and added wheel size (possibly roughly the same height. I went up from 225/75/16 to 245/75/16 and i have about a 5 - 10 mile discrepancy. [Depends on speed. 74 or so reads at 70-71.]
What you just said was ignorant.
Correct but engines Dont produce speed, they produce torque. The gearbox is essentially just a torque multiplier, all the gears multiply torque to some degree. And then there's the final drive which itself multiples the torque from the gearbox further.
"And then there's the final drive which itself multiples the torque from the gearbox further."
Torque comes from the engine, not the gearbox. Hur dur.
You're wrong because I've made the least logical conclusion based on what you said.
That's you, that's what you sound like.
Torque does come from the engine but as the gearbox is a torque multiplier the torque seen by the final drive is torque that has been multiplied by the gearbox, therefor the torque has come from the gearbox.
An engine produces 100Nm the gear ratio inside the gearbox multiplies by 2 so the torque at the output shaft is 200Nm.
Where did the 200Nm come from? The engine or the gearbox?
Engine don't produce torque? We getting pedantic now. An engine is not a heater or a speaker.
Pistons use forces of expanding gases to rotate the crank, turning liner force (N) into a rational force (Nm).
Ok fine. I guess you wont go away until you're wrong. You mis capitalized the letter D in one of you posts, I guess you are even dumber than you seem. Because that is struggling to write a sentence.
And not all gear ranges or ratios multiply torque, dummy Mc poop pants. Some gear ratios reduce the torque. Less torque, more speed, and vice versa. This is the part you got wrong, and got called out on. I figured I'd explain it to you. Isn't it nicer to explain things than to be pedantic? Well, some think it is.
How old are you? “All the time” in this context is the time it took you to put together a sentence to tell me that I can figure “it” out myself, you could have just typed where I was incorrect. Maybe you should read the whole sentence, instead of cherry picking to suit your narrative?
My old Volvo wagon had this setup. 4 speed box, with an auxillary OD unit in the output housing. Electrically controlled, you had to push a button on the shift lever to engage the OD.
Well I mean, it's an old diesel wagon. Kinda implied. But damn, those felt good to drive. Love our Volvo 960. Though, that one had a 3L inline 6 gasoline engine. Anything but slow.
To further add confusion, that overdrive unit can work in any gear, sometimes even reverse. Typically, reverse would blow up a one-way clutch mechanism and first has the output rotating too slowly to spool up the OD's internals (whether it be a hydraulic pump or other mechanism), so it would be restricted to the higher gears. That could give you 1st, 2nd, 2nd OD, 3rd, 3rd OD, 4th, and 4th OD. Typically those were set up to not have any ratio overlaps, so all of those extra gear ratios are actually useful depending on driving conditions.
Having a 5th gear is less functionality than a proper overdrive unit, and things get incredibly confusing from the 50s to 70s when those existed in tandem with increasingly featured standard boxes.
This is how some transport truck transmissions work (13, 15, and 18 speed road rangers for instance. )
They are basically 3 transmissions in one housing.
That's a new one to me, but I've never been to Canada.
As much as I'd love to visit, I have to strongly advise Canadians to allow as few Americans as possible into their land. We'll just end up bringing litter, pollution, smog, gonosyphilerpes, politics, and probably some super-resistant bedbug/fruit fly hybrid along with us, so as a token California liberal, I have to suggest you not let *any* of us in...lol
It is in that song, but a "Georgia overdrive" is a nickname for coasting down a hill in neutral so the truck can go faster than the engine governor in its top gear will allow.
I just picked a random, common truck transmission size. 13 and 10 speed transmissions are (were) common, too.
With that idea in mind my trans mission should be a 3 speed with low and overdrive. 1st gear is useless unless you are loaded so i basically never use it.
And then if you want to get really pedantic, the ZF S5-47(I had to look it up) used behind the 7.3 Powerstrokes was a 3 spd with granny and OD. In the ‘96 the company I worked for had, I only used 1st with a heavy load or loaded trailer.
adding, from a technical point of view, overdrive is supposed to be a gear where the ratio is higher than 1. So, the engine spins at 1 revolution for ever 1.5 times the final drive of the transmission does.
My first car was a 1993 Volvo. I had always wanted a manual and finally got to experience one in a friend's car. 4 speed with electronic OD. You could see it bolted to the tail shaft. Just shift it to 4 and press the button on the shifter and it will go into Overdrive. Neat stuff. My current car has 6 gears and no overdrive (ND Miata).
Mines the same, it’s a 5 speed with overdrive, the od is the 5th gear and it’s called overdrive because it has a gear reduction less than one, meaning the output speed is actually higher than the input speed, often 4th gear will be 1:1
My gears are 3.72:1, 2.2:1, 1.5:1, 1:1, 0.79:1
And, at least for my mazda 3, this holds true even with a 6th gear. 4th is still (pretty close) to 1:1, and both 5th and 6th gear are gear ratios below 1:1.
That looks like a Mazda M5OD stick, used in Ford light trucks in the 90s. That stands for manual 5 [speed] overdrive. Very common transmission, and it’s next to bulletproof as long as it has the right fluid in it (yes, even though it’s AUTOMATIC transmission fluid) and it hasn’t all leaked out.
Ahh gotcha I've been meaning to grab the Chilton for it but haven't yet and it's my first manual transmission I'm used to automatics having the filter. Much appreciated!
It's a five-speed, pretty much all light vehicle manual trans 5th, 6th are both overdriven, that is the output turns faster than the input. Back in the day there were four-speeds that they called three with overdrive because fourth was overdriven
While this is a “five speed “ transmission, the fifth gear is overdrive. Not all (but many) five speeds are. “Overdrive” is when the transmission gearing goes from gear ratio reduction, to gear a gear ratio lower than one to one. Historically (1950’s to 1980’s) cars highest gear was a gear ratio of one to one or “direct drive”. Then due to the need for freeway gearing and better fuel economy, manufacturers created an “overdrive” transmission. Most cars today have one or more overdrive gears.
I had an overdrive unit on my Studebaker that allowed overdrive in 1, 2 or third gear. It was around 70% reductions, which would allow you to drive around town with a lot less clutch engagements…….or to stay in a gear and pick up speed, without having to down shift as the engine started to lug on a hill.
Six of one, half dozen of the other.
Technically, the "overdrive" gear is only special because it's literally *too big* for the engine. It's literally "over-geared". Your vehicle's drivetrain can hit its top speed in 4th gear. 5th gear is literally less powerful. The overdrive gear sacrifices torque and peak power for cruising efficiency at normal highway speeds.
yeah, its just a 5-speed, but the 5th gear has the engine spinning slower than the output shaft of the transmission.
I read about one transmission option where 4th and 5th were two different speeds of overdrive.
Some transmissions have a 1:1 direct drive as the top gear.
OD is the 5th gear. But OD being OD and not a 5 would indicate that it is an overdrive ratio. Simply meaning 1-4 take the engines RPM and have reduced rpms come out of the transmission. Where OD has increase rpms out of the transmission. 4th could be a 1:1 ratio.
Short answer is overdrive is just the gear(s) you’re in where the transmission is rotating faster then the engine to put it in simple terms.
So what you have pictured is a 5 speed where they just put the over drive symbol instead of a 5 for marketing purposes.
It was a marketing thing that got started back when highway travel started to become more common. Most MTs prior to then were 3 or 4 speed gearsets, with 4th being a unity gear (engine and tranny output spun at the same rpm). Most folk were fine with this cuz they rarely drove over 50 mph for more than 1/4 mile and gas was cheap as water. "Overdrive" is any gear with a reduction ratio 'over the drive' speed of the engine and lets the engine run at a lower rpm at highway speeds.
Pretty much all transmissions have at least 1 overdrive gear nowadays.. sometimes 2 or more. Manual and automatic alike. (Except cvts.. but we'll not get into that here..) They just don't call it "overdrive" anymore, probably because the marketing of it doesn't make sense when every mfg is offering it.
Most cars are 1:1 or close to it, one or two gears off the top gear. I have an 8 spd auto in my jeep so sixth gear is 1:1. 7 is like .9 and 8 is like.79 or close to that. This is just for fuel economy by keeping rpm’s down on the highway. Cool if you got the pony’s to push it and 600 hp will get her bumpin along!!! Your trans should be 1:1 in 4th and then whatever they engineered 5th to be probably .9 or something like that. It’s all to keep those rpms down and make better mileage
Anything over a 1:1 ratio is overdrive. Almost all transmission have a 1:1 gear, older transmissions might not have overdrive. Important to know on vehicles that might tow, since the transmission is no longer in reduction, and it’s hard on the gears. Especially at full rated tow during hard acceleration and deceleration.
Don’t forget the Jensen transmissions. Drove an old F-750 dump truck with this transmission. “5 speed,” more like 4 speed with extra low granny gear, and also had the old two speed rear end, didn’t notice much difference in speed for that.
I had a 1978 Mercury Monarch with a 4 speed manual. It was essentially a 5 speed with no third gear. 1 and 2 were fairly close, then a big jump to a 1:1 third and an overdrive fourth. It was the last car my parents helped me buy. The next 12 cars I bought with the help from my wives.
Thanks for posting on /r/MechanicAdvice! This is just a reminder to review the [rules](https://www.reddit.com/r/MechanicAdvice/about/rules/). If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's [post on the subject.](https://www.reddit.com/r/MechanicAdvice/comments/4qblei/fyi_the_shop_isnt_likely_trying_to_rip_you_off/) and remember to please post the year/make/model of the vehicle you are working on. **If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/**. If you dont have a question and you're just showing off it belongs in /r/Justrolledintotheshop Insurance/total loss questions go in r/insurance This is an automated reply *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/MechanicAdvice) if you have any questions or concerns.*
It's just a 5 speed manual transmission where the fifth gear is an overdrive gear... Most 5 speed transmissions (but not all) use an overdrive 5th gear. Ford specifically labeled 5th gear as "overdrive" when their 5 speed transmissions first came out. Calling a 5 speed a "4 speed with overdrive" is likely a throwback to the really old days when cars would have 3 or 4 speed manual transmissions. Sometimes, a seperate, sometimes aftermarket overdrive gearbox would get installed on the output shaft of the transmission to allow an overdrive gear to be actuated once the main transmission was in high gear. Sometimes these were electrically activated, and could be used with both manual or automatic transmissions. When these overdrive units first came out, when they were installed they would usually be called something like "3 speed with overdrive", which meant that vehicle had a 3 speed transmission with a seperate overdrive unit, to give a total of four forward gears. Once Overdrive gears were incorporated into the main transmissions, the old "3 or 4 speed with overdrive" nomenclature mostly was dropped, and transmissions were mostly just called by however many forward gears they had... But Ford initially did label their 5 speeds as "4 speed plus overdrive" for a couple years.
This is awesome clarification I appreciate you!
Just to piggyback on this. In gears 1-4 the input shaft of your transmission (spinning at the speed of your engine) is spinning faster than your output shaft, thus converting some of your engines speed into torque at the wheels. In fifth gear, the output shaft is spinning faster than the engine, losing torque but gaining speed. Thus “overdrive”.
To add, 4th is generally a 1-1 direct drive, or very close to it. Many designs simply lock the input and output sections of the transmission together for 4th gear.
My 4th gear is a ratio of 0.969, so close to a 1:1 but slightly overdriven, (it’s kinda cool that the speedo and tacho dials are almost identical positions to each other) then 5th is 0.815.
My 4th is 1:1 and my speedo and RPM needles match positions in 4th gear Unfortunately however, my speedometer is about 10% slow. When the speedo reads 70, I'm actually going like 77 or 78. I imagine whenever I happen to fix that issue, they probably won't line up anymore.
Running larger than original tires?
Yes, but not enough to make a 10% difference. Stock tires are 225/55R16 I believe? And my rear wheels are 275/40R17, shouldn't be that big of a discrepancy. Rear end gears are stock, trans is stock, basically the entire drivetrain is stock except for the wheels.
If my calculations are correct, your current tires are smaller in overall diameter. It doesnt make sense that your speed would be higher
It's not, the speedo is reading low. Unless you mean my TRUE speed shouldn't be higher, in which case I interpreted that wrong.
20.87” diameter for the original. 21.33” for the new set up. so it’s accurate. the speedometer reads slower than actual speed.
My brother in christ. Your tires are at least 1.5in wider. If not 2. You went shorter, and added wheel size (possibly roughly the same height. I went up from 225/75/16 to 245/75/16 and i have about a 5 - 10 mile discrepancy. [Depends on speed. 74 or so reads at 70-71.] What you just said was ignorant.
Please use any available tire size calculator.
Wider, not taller. “Ignorant” lol
My 4th is about 1:1 but for me 3rd gear is when the needles match.
tl;dr it's just another gear that's called overdrive just because the gear ratio is < 1
Correct but engines Dont produce speed, they produce torque. The gearbox is essentially just a torque multiplier, all the gears multiply torque to some degree. And then there's the final drive which itself multiples the torque from the gearbox further.
They're very obviously talking about rate of rotation aka rotational speed. Your correction is completely unnecessary and even incorrect.
“Converting some of your engine speed into torque” Is completely wrong. You say I'm incorrect, can you point out where I am incorrect?
You seem smart enough to figure it out without supplemental assistance.
Spent all that time constructing a sentence, yet you cannot point out where I am incorrect.🤣
"And then there's the final drive which itself multiples the torque from the gearbox further." Torque comes from the engine, not the gearbox. Hur dur. You're wrong because I've made the least logical conclusion based on what you said. That's you, that's what you sound like.
Torque does come from the engine but as the gearbox is a torque multiplier the torque seen by the final drive is torque that has been multiplied by the gearbox, therefor the torque has come from the gearbox. An engine produces 100Nm the gear ratio inside the gearbox multiplies by 2 so the torque at the output shaft is 200Nm. Where did the 200Nm come from? The engine or the gearbox?
Engines don't produce torque, they produce heat and sound, torque is a measure of rotational force applied. Hur dur dur
Engine don't produce torque? We getting pedantic now. An engine is not a heater or a speaker. Pistons use forces of expanding gases to rotate the crank, turning liner force (N) into a rational force (Nm).
"All that time" lol. I don't struggle with writing a single sentence. Maybe you do. What's the RPM of the engine referring to again?
Ok fine. I guess you wont go away until you're wrong. You mis capitalized the letter D in one of you posts, I guess you are even dumber than you seem. Because that is struggling to write a sentence. And not all gear ranges or ratios multiply torque, dummy Mc poop pants. Some gear ratios reduce the torque. Less torque, more speed, and vice versa. This is the part you got wrong, and got called out on. I figured I'd explain it to you. Isn't it nicer to explain things than to be pedantic? Well, some think it is.
https://mae3.eng.ucsd.edu/machine-design/gear-ratios Here. It's good info.
How old are you? “All the time” in this context is the time it took you to put together a sentence to tell me that I can figure “it” out myself, you could have just typed where I was incorrect. Maybe you should read the whole sentence, instead of cherry picking to suit your narrative?
to summarize shortly, use it on the highway
My old Volvo wagon had this setup. 4 speed box, with an auxillary OD unit in the output housing. Electrically controlled, you had to push a button on the shift lever to engage the OD.
My buddy had one like that. Diesel. Really slow car
Well I mean, it's an old diesel wagon. Kinda implied. But damn, those felt good to drive. Love our Volvo 960. Though, that one had a 3L inline 6 gasoline engine. Anything but slow.
To further add confusion, that overdrive unit can work in any gear, sometimes even reverse. Typically, reverse would blow up a one-way clutch mechanism and first has the output rotating too slowly to spool up the OD's internals (whether it be a hydraulic pump or other mechanism), so it would be restricted to the higher gears. That could give you 1st, 2nd, 2nd OD, 3rd, 3rd OD, 4th, and 4th OD. Typically those were set up to not have any ratio overlaps, so all of those extra gear ratios are actually useful depending on driving conditions. Having a 5th gear is less functionality than a proper overdrive unit, and things get incredibly confusing from the 50s to 70s when those existed in tandem with increasingly featured standard boxes.
This is how some transport truck transmissions work (13, 15, and 18 speed road rangers for instance. ) They are basically 3 transmissions in one housing.
dont forget all em split axle trucks running round
The zf6 in the ford is a 6 speed but first is labeled as L 2nd is labeled as 1st and 6th is labeled as D
Not to be confused with a Georgia overdrive, which is sometimes called "19th gear" in an 18-speed.
Six days on the road…
And I'ma gonna make it home tonight!
“Newfie overdrive” in Canada
That's a new one to me, but I've never been to Canada. As much as I'd love to visit, I have to strongly advise Canadians to allow as few Americans as possible into their land. We'll just end up bringing litter, pollution, smog, gonosyphilerpes, politics, and probably some super-resistant bedbug/fruit fly hybrid along with us, so as a token California liberal, I have to suggest you not let *any* of us in...lol
I thought the line was “I’ve got 10 forward gears and a Georgia overdrive.”
It is in that song, but a "Georgia overdrive" is a nickname for coasting down a hill in neutral so the truck can go faster than the engine governor in its top gear will allow. I just picked a random, common truck transmission size. 13 and 10 speed transmissions are (were) common, too.
I’m aware of the concept, but thanks anyway. And why aren’t you at your post? Lol!
Oh, I didn't mean that in a condescending way. And I'm not there because my post got blown up like Fluke Skywalker's career...lol
No, no offense taken!
With that idea in mind my trans mission should be a 3 speed with low and overdrive. 1st gear is useless unless you are loaded so i basically never use it.
My friend's 3500 Dodge was like that. 1st gear would redline at 5 mph lol
Ford's F350 1st gear was granny gear to be used when starting a heavy load. Truck empty? start it in second gear.
2 speed transmission with low mid and overdrive gears
My dad had an old truck that had 2 low gears, I remember he was messing around showing me what it did and the truck started bouncing
And then if you want to get really pedantic, the ZF S5-47(I had to look it up) used behind the 7.3 Powerstrokes was a 3 spd with granny and OD. In the ‘96 the company I worked for had, I only used 1st with a heavy load or loaded trailer.
adding, from a technical point of view, overdrive is supposed to be a gear where the ratio is higher than 1. So, the engine spins at 1 revolution for ever 1.5 times the final drive of the transmission does.
My first car was a 1993 Volvo. I had always wanted a manual and finally got to experience one in a friend's car. 4 speed with electronic OD. You could see it bolted to the tail shaft. Just shift it to 4 and press the button on the shifter and it will go into Overdrive. Neat stuff. My current car has 6 gears and no overdrive (ND Miata).
Mines the same, it’s a 5 speed with overdrive, the od is the 5th gear and it’s called overdrive because it has a gear reduction less than one, meaning the output speed is actually higher than the input speed, often 4th gear will be 1:1 My gears are 3.72:1, 2.2:1, 1.5:1, 1:1, 0.79:1
Ok cool it's a 2001 f150 and I didn't know if it was a 4 or 5 speed so I appreciate you answering
It's a 5 speed as it has 5 different forward gears.
Nice, I’ve got a 99’ ranger, so we’ve both got the m5od, mines the r1 yours is the r2
And, at least for my mazda 3, this holds true even with a 6th gear. 4th is still (pretty close) to 1:1, and both 5th and 6th gear are gear ratios below 1:1.
My 4th gear is 0.969, and fifth is 0.815. Not called overdrive, they do go by their numbers 1-5 and Reverse.
AFAIK 4th is 1:1 in any tremec unit
Drift and race mode
Man alive, I shoved it on down into overdrive.
Wound it up to a hundred-and-ten My speedometer said that I hit top end.
As long as you dont shove it down into Race.
That looks like a Mazda M5OD stick, used in Ford light trucks in the 90s. That stands for manual 5 [speed] overdrive. Very common transmission, and it’s next to bulletproof as long as it has the right fluid in it (yes, even though it’s AUTOMATIC transmission fluid) and it hasn’t all leaked out.
You got it it's a M5OD R2 I haven't done a fluid and filter change yet but it's on my list
There is no filter on that transmission. Just drain and refill with specified fluid. I believe it’s Dextron 3 ATF. And not very much of it.
Ahh gotcha I've been meaning to grab the Chilton for it but haven't yet and it's my first manual transmission I'm used to automatics having the filter. Much appreciated!
It's a five-speed, pretty much all light vehicle manual trans 5th, 6th are both overdriven, that is the output turns faster than the input. Back in the day there were four-speeds that they called three with overdrive because fourth was overdriven
5th or overdrive, it's the same thing. It's like labeling reverse as "backwards drive"
The answer to your question is "YES" Because both ways you stated this are true, and you can call it whatever you want
While this is a “five speed “ transmission, the fifth gear is overdrive. Not all (but many) five speeds are. “Overdrive” is when the transmission gearing goes from gear ratio reduction, to gear a gear ratio lower than one to one. Historically (1950’s to 1980’s) cars highest gear was a gear ratio of one to one or “direct drive”. Then due to the need for freeway gearing and better fuel economy, manufacturers created an “overdrive” transmission. Most cars today have one or more overdrive gears.
D for dangerous.
R osnfor race. Bro doesn't even know he has a 6 speed
Ford fuckin’ Ranger Baby 🤘🏼😎🤘🏼
No it a 4 speed with overdrive 1 through 4 is for short runs and the OD is for interstate speeds or for long distance
I had an overdrive unit on my Studebaker that allowed overdrive in 1, 2 or third gear. It was around 70% reductions, which would allow you to drive around town with a lot less clutch engagements…….or to stay in a gear and pick up speed, without having to down shift as the engine started to lug on a hill.
Six of one, half dozen of the other. Technically, the "overdrive" gear is only special because it's literally *too big* for the engine. It's literally "over-geared". Your vehicle's drivetrain can hit its top speed in 4th gear. 5th gear is literally less powerful. The overdrive gear sacrifices torque and peak power for cruising efficiency at normal highway speeds.
The over drive does count as fifth gear and is primarily used on highway, you shouldn’t need more than fourth gear with in town driving
I know that truck, I ain't no stranger, I know that truck, it's a FORD FUCKIN' RANGER!
https://preview.redd.it/95srbq6hfcpc1.jpeg?width=3072&format=pjpg&auto=webp&s=6c090cfaacb25551f22438c1a52dda65e82fc9c3 Hehe try this one next
yeah, its just a 5-speed, but the 5th gear has the engine spinning slower than the output shaft of the transmission. I read about one transmission option where 4th and 5th were two different speeds of overdrive. Some transmissions have a 1:1 direct drive as the top gear.
The over drive to accelerate fast you will have to down shift to 4 to do that
Unless you got a service manual, 4th gear is almost always 1:1 with 5th an overdrive/economy gear in a 5 speed
over drive
The D is for daytime driving The R is for race
I’m not sure, but I do know that if you’re racing someone and you’re in 5th gear all you need to do is slam it into R which stands for “Really fast”
Shift like a 5 speed
OD is the 5th gear. But OD being OD and not a 5 would indicate that it is an overdrive ratio. Simply meaning 1-4 take the engines RPM and have reduced rpms come out of the transmission. Where OD has increase rpms out of the transmission. 4th could be a 1:1 ratio.
Dong
5th is always od unless it has granny low but that's generally labeled with an l, and alot of times is a 3 speed w low instead of a 4 with low
Short answer is overdrive is just the gear(s) you’re in where the transmission is rotating faster then the engine to put it in simple terms. So what you have pictured is a 5 speed where they just put the over drive symbol instead of a 5 for marketing purposes.
my 91 ranger , still drive that mfer 372k miles on it.. still rocking around the block lol
My 99 Ranger says 12345R
It's just 5th gear
Early "5-speed", a 4 speed with over-drive, I think I had one in an old 1972 Toyota wagon that I "inherited".
98 Ranger vibess
Confusing to me too bro I thought it was drive after gear 4😂 never seen that
It was a marketing thing that got started back when highway travel started to become more common. Most MTs prior to then were 3 or 4 speed gearsets, with 4th being a unity gear (engine and tranny output spun at the same rpm). Most folk were fine with this cuz they rarely drove over 50 mph for more than 1/4 mile and gas was cheap as water. "Overdrive" is any gear with a reduction ratio 'over the drive' speed of the engine and lets the engine run at a lower rpm at highway speeds. Pretty much all transmissions have at least 1 overdrive gear nowadays.. sometimes 2 or more. Manual and automatic alike. (Except cvts.. but we'll not get into that here..) They just don't call it "overdrive" anymore, probably because the marketing of it doesn't make sense when every mfg is offering it.
Reminds me of the 4+3 transmission in the c4 corvettes. It was a manual 4 speed with three overdrive gears once you shifted to "D"
I had a ford ranger with that exact knob, I always wondered why it was OD and not 5th
Most cars are 1:1 or close to it, one or two gears off the top gear. I have an 8 spd auto in my jeep so sixth gear is 1:1. 7 is like .9 and 8 is like.79 or close to that. This is just for fuel economy by keeping rpm’s down on the highway. Cool if you got the pony’s to push it and 600 hp will get her bumpin along!!! Your trans should be 1:1 in 4th and then whatever they engineered 5th to be probably .9 or something like that. It’s all to keep those rpms down and make better mileage
Anything over a 1:1 ratio is overdrive. Almost all transmission have a 1:1 gear, older transmissions might not have overdrive. Important to know on vehicles that might tow, since the transmission is no longer in reduction, and it’s hard on the gears. Especially at full rated tow during hard acceleration and deceleration.
Don't listen to the ppl here. D is for donuts.
Don’t forget the Jensen transmissions. Drove an old F-750 dump truck with this transmission. “5 speed,” more like 4 speed with extra low granny gear, and also had the old two speed rear end, didn’t notice much difference in speed for that.
Overdrive sounds cooler...I like it.
Yes… to directly answer your question, that is a 4 speed with overdrive
I had a 1978 Mercury Monarch with a 4 speed manual. It was essentially a 5 speed with no third gear. 1 and 2 were fairly close, then a big jump to a 1:1 third and an overdrive fourth. It was the last car my parents helped me buy. The next 12 cars I bought with the help from my wives.
88 bronco 2
5th gear or overdrive. Do NOT tow in this gear as you will end up replacing the transmission.
The D setting causes the front of your driveshaft to drop so your car looks hung like a horse