It's not hard and easier than trying to find a trans that's 40+ years old and in good condition.
Transmission fitment
Thread Starter
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5th Wheeling
Joined: Aug 2022
Posts: 29
Likes: 1
Transmission fitment
I have a 1980 f100 302 2wd with a 3spd and od. Figured out today the transmission is bad, could I possibly unbolt the transmission from the bell housing out of a 82 f150 300 4x4 4spd and use it in my truck. Thanks in advance
Super Moderator
Joined: Apr 2004
Posts: 34,495
Likes: 2,809
4x4 transmission is made to bolt to the transfer case. It requires a full teardown and different output shaft and housing to convert.
Keep looking.
What's wrong with your current transmission? If it's just bearings and synchros you can get a rebuild kit.
Keep looking.
What's wrong with your current transmission? If it's just bearings and synchros you can get a rebuild kit.
Thread Starter
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5th Wheeling
Joined: Aug 2022
Posts: 29
Likes: 1
When it’s accelerating it wants to pop out of 1st and 3rd. No other gears just those 2 so I have to constantly hold on shifter so it doesn’t
FTE Legend
Joined: Nov 2015
Posts: 30,912
Likes: 4,123
From: Angier, NC
But he is still stuck with a weak transmission as the 3sp w/OD were not all that good when they came out.
As said if it is a 4x4 it bolts to a transfer case and to change it to 4x2 like you have you need to rebuild the 4x4 using 4x2 parts (out put shaft & tail housing).
Now if you want to keep it over drive you need to look for a M5OD out of a 4x2 from 87 to think 92 150 / 250 trucks so you have the speedo hole for the cable.
Later years ran off a ring on the rear axle to a computer to display on the dash.
The bell is part of the transmission so you having a 300 (small block bell bolt pattern) the trans needs to come from a 300 / 302 or 351 power truck.
The other thing with the M5OD is the clutch as it uses a master / slave so you would need to mount the master and the clutch pedal arm is different to push the master rod. They say it is a much better transmission but I have never driven a truck with that transmission. There has to be a reason why Ford only used the 3sp OD trans for a few years in the 80's.
Dave ----
As said if it is a 4x4 it bolts to a transfer case and to change it to 4x2 like you have you need to rebuild the 4x4 using 4x2 parts (out put shaft & tail housing).
Now if you want to keep it over drive you need to look for a M5OD out of a 4x2 from 87 to think 92 150 / 250 trucks so you have the speedo hole for the cable.
Later years ran off a ring on the rear axle to a computer to display on the dash.
The bell is part of the transmission so you having a 300 (small block bell bolt pattern) the trans needs to come from a 300 / 302 or 351 power truck.
The other thing with the M5OD is the clutch as it uses a master / slave so you would need to mount the master and the clutch pedal arm is different to push the master rod. They say it is a much better transmission but I have never driven a truck with that transmission. There has to be a reason why Ford only used the 3sp OD trans for a few years in the 80's.
Dave ----
Laughing Gas
Joined: Nov 2013
Posts: 1,022
Likes: 79
From: A dirty little town in OR
M5OD or ZF5 might be an option here...
Either one (2wd with the small bolt pattern) will work, but the swap is a little bit more involved. Shifter location and possibly driveshaft length are the two biggest changes.
Either one (2wd with the small bolt pattern) will work, but the swap is a little bit more involved. Shifter location and possibly driveshaft length are the two biggest changes.
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Laughing Gas
Joined: Sep 2016
Posts: 774
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From: Elk Grove Village, IL
Don't we need to make the distinction between 351W (small block) and 351M (big block)?
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Thread Starter
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5th Wheeling
Joined: Aug 2022
Posts: 29
Likes: 1
Can you find a video on rebuilding it, I think I found a kit. But would like a guide on how to do it
Super Moderator
Joined: Apr 2004
Posts: 34,495
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Which trans do you have?
--shifter on the top with the shifter mount part of the top cover?
--shifter behind the top cover on a turret, with a tube going forward?
(Both of those aluminum case)
--Shifter on the tailshaft with external linkage to shift arms on the side of the transmission?
--shifter on the top with the shifter mount part of the top cover?
--shifter behind the top cover on a turret, with a tube going forward?
(Both of those aluminum case)
--Shifter on the tailshaft with external linkage to shift arms on the side of the transmission?
Thread Starter
|
5th Wheeling
Joined: Aug 2022
Posts: 29
Likes: 1
Which trans do you have?
--shifter on the top with the shifter mount part of the top cover?
--shifter behind the top cover on a turret, with a tube going forward?
(Both of those aluminum case)
--Shifter on the tailshaft with external linkage to shift arms on the side of the transmission?
--shifter on the top with the shifter mount part of the top cover?
--shifter behind the top cover on a turret, with a tube going forward?
(Both of those aluminum case)
--Shifter on the tailshaft with external linkage to shift arms on the side of the transmission?
Super Moderator
Joined: Apr 2004
Posts: 34,495
Likes: 2,809
https://www.drivetrain.com/parts-cat...-quote-the-cor
Several other sources as well.
I can't find a decent SROD rebuild video.
The old toploader performance 4 speed is similar, but the differences are such that you can't rely on that set of instructions to get an SROD right.
Have you ever rebuilt a transmission before? Like the idea of a new hobby? Got a spare $500 laying around?
Several other sources as well.
I can't find a decent SROD rebuild video.
The old toploader performance 4 speed is similar, but the differences are such that you can't rely on that set of instructions to get an SROD right.
Have you ever rebuilt a transmission before? Like the idea of a new hobby? Got a spare $500 laying around?
Thread Starter
|
5th Wheeling
Joined: Aug 2022
Posts: 29
Likes: 1
https://www.drivetrain.com/parts-cat...-quote-the-cor
Several other sources as well.
I can't find a decent SROD rebuild video.
The old toploader performance 4 speed is similar, but the differences are such that you can't rely on that set of instructions to get an SROD right.
Have you ever rebuilt a transmission before? Like the idea of a new hobby? Got a spare $500 laying around?
Several other sources as well.
I can't find a decent SROD rebuild video.
The old toploader performance 4 speed is similar, but the differences are such that you can't rely on that set of instructions to get an SROD right.
Have you ever rebuilt a transmission before? Like the idea of a new hobby? Got a spare $500 laying around?
Laughing Gas
Joined: Sep 2016
Posts: 774
Likes: 104
From: Elk Grove Village, IL
Sorry, I'm an old fart and my default "go to" for information is the shop manual. I am not aware of any YT videos but there could be some out there (I've never searched, TBH).
