Output Shaft Seal

[SmokeShow]

On a 4wd, there is a seal on the back of the transfer case that just presses into the case housing. Is there another seal up in there on the output shaft that actually does the sealing or is that press-in seal the only one?

I had a twisted driveshaft so I suspect it made contact with that press-in seal & has wore it out & it keeps coming lose. I replaced the driveshaft with a new one tonight & serviced the transfer case. Upon returning from the test drive I felt great because the truck road silky smooth up to excessive speeds. So hopefully my rear engine cover/bellhousing/alli rear housing cracking issue due to a driveline vibration is over!

Then it went down hill from there when I crawled back under truck to inspect a drip. The press-in seal was pulled out & by the looks of ATF from xcase to rear bumper, it looks like all the fluid I just put in has coated my under carriage.

I'm going to order a new press-in seal in a minute. But it seams like that seal is more like a dust seal since it's not held in place by any retainer. So perhaps I have another seal that's bad?


Thanks for any insight!

 

[JoshH]

That seal should press in tight enough that it won't come out unless you pull it out. That is the only seal on the transfer case rear output.

 

[SmokeShow]

Ok, I tapped it in all the way this time with a hammer. I still think it's fubar though as a piece of metal is sticking out past the seal & it's not like that on the other three cases I have here.

I'll put a new in and hope for the best.

Thanks Josh.


Side note... How much grease should be put on the splines of the slip yoke & output shaft? Any on the outside part of the slip yoke? I put a dab in all splines as far as my finger could reach up into the slip yoke & a couple dabs around the front of the output shaft & a skim coat on the outside of the slip yoke.

 

[BlkMax]

X2

That is the only seal on the transfer case rear output.

You should also check to make sure the bushing in the tail shaft of the t-case is in good condition if you are wondering about the seal.

If you want a pic of the t-case I have mine apart on the bench today.