just got done doing a search with no real answers 1980 205 slip yoke there is oil driping from the yoke itself at the u joint but the shaft that slides in the tcase is dry where exactly does the oil come from and what seal do i get to fix it its been sitting all week so you would think if it was the seal around the yoke the shaft would be wet to or am i missing somthing?
CK5
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leaking 205
- Thread starter Thumbs75
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From what I can tell, this is an occasional problem with some slipyokes. There is a vent hole in the end of the yoke to relieve pressure between the end of the shaft and the inside of the slip yoke as it moves in and out.
Some people weld that hole closed and don't seem to have problems.
I would worry about it causing loading on the shaft system when it flexes fast.
There is a seal made that is for that, but its hard to find and I'm not sure how well it works.
Its a piece of "star shaped" rubber that goes inside the spline part of the yoke. The outside has grooves that match the splines.
Its suppose to sit up against the end of the shaft.
The only place I have ever seen one from the factory was on some Jeeps. Someone else here may have a line of them.
I suppose you could take the yoke off, clean the end of the shaft really well and put a glob of silicone rubber on it slightly bigger than the end of the shaft.
Making sure that the inside of the yoke was well greased, slide it back on after the rubber had partially cured so that it would conform to the shape of the splines.
After it had set up, you could carefully slide the yoke back off and tidy it up.
Some people weld that hole closed and don't seem to have problems.
I would worry about it causing loading on the shaft system when it flexes fast.
There is a seal made that is for that, but its hard to find and I'm not sure how well it works.
Its a piece of "star shaped" rubber that goes inside the spline part of the yoke. The outside has grooves that match the splines.
Its suppose to sit up against the end of the shaft.
The only place I have ever seen one from the factory was on some Jeeps. Someone else here may have a line of them.
I suppose you could take the yoke off, clean the end of the shaft really well and put a glob of silicone rubber on it slightly bigger than the end of the shaft.
Making sure that the inside of the yoke was well greased, slide it back on after the rubber had partially cured so that it would conform to the shape of the splines.
After it had set up, you could carefully slide the yoke back off and tidy it up.
That won't work on a slip yoke.
The slip yoke has a plug that is sealed from factory, it sometimes falls and you need to plug it.
I have the same thing on my 97 2wd van shaft.
It's supposed to be plugged the vent in the tranny and tcase take care of any pressure build up from the shaft going in and out.
To the OP, if you can reach it to plug it with JBweld or a bolt while in place do it.
If you can't you might be able to just pull out the shaft and bend that joint so you have access to it.
It's in the middle of the slip yoke between it and the Ujoint.
For now I just park it back up the driveway and while driving it doesn't leak.
The rubber seal pictured is for bolt on yokes, it's to prevent oil from creeping out the spines and dripping from the center retaining nut. These are factory parts on 205's both front and rear (with bolt on yokes).
Also, they are not used on the slip yoke assemblies.
Also, they are not used on the slip yoke assemblies.
I agree. But the pressure buildup I was talking about is between the end of the splined shaft and the inside of the yoke.
Of course the air can get between the splines and relieve the pressure or vacuum as it slides.
But there is a limit to how fast that air can squeeze between them, and if you hit a big bump going fast, that space can change really fast.
Whats really bad, is if transmission fluid leaks into that space and then you hit that bump.
Air will compress. Fluid will not.
And that fluid will not flow back through those splines much at all in that time frame unless the splines are really worn.
Which means that drive shaft will tend to act like a solid bar with no slipyoke.
Not a good thing.
Most of the slipyokes I have ever seen have a flat steel plate over the end of the yoke hole.
And they usually have a small hole drilled in that plate.
Some are solid with the hole drilled.
Its easier to machine the shaft hole and splines if its a through hole, thus the plate.
On driveshaft mounted slipyokes, that is the hole that the grease oozes out when you grease the slip part.
And the grease shoots out when you hit a bump the first time.
You're right that its not the right washer. I'm still groggy from turkey hunting. I just saw the star washer and forgot about the shaft sticking out the middle.
But I have seen them with solid centers that go on the end of the shaft.
