Hey guys, a few years back i had a 4 speed toploader put in place of my 3 speed. The transmission is awesome, however i think that the tail of the 3 speed was a bit longer than the 4 and the yoke doesn't quite go as far in as it could. I'm guessing this is where my oil leak is coming from? Is there a rear seal on the tranny that might fix this? What about a different yoke? How many splines does it have? Do they make one a bit longer or is getting a completely new driveshaft the only option? I don't have any information on the 4 speed, someone found it at a salvage yard. Thanks for any input!
4 speed swap leak
- Thread starter Beef97
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Dark Knight
Founding Member
If you can get underneath, try and look at the casting numbers..
http://www.davidkeetoploaders.com/idchart1.htm
I'd unbolt the driveshaft from the rear and see how much foward travel you have before it bottoms out. Check the input shaft for nicks, they'll chew up the rear seal quick.
http://www.davidkeetoploaders.com/idchart1.htm
I'd unbolt the driveshaft from the rear and see how much foward travel you have before it bottoms out. Check the input shaft for nicks, they'll chew up the rear seal quick.
dennis112
15 Year Member
All you probably need is a fresh rear seal. Get one and then do the depth check when you go to replace it.
While you are checking for depth, also try to wiggle the shaft up and down and left to right to determine if the tailshaft bushing is bad. Excess slop will lead to leaks. The tailshaft housing would have to be dropped if this is the case.
While you are checking for depth, also try to wiggle the shaft up and down and left to right to determine if the tailshaft bushing is bad. Excess slop will lead to leaks. The tailshaft housing would have to be dropped if this is the case.
HistoricMustang
Active Member
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