leaking front and rear transfer case/gear box

[christja]

anyone ever tackled leaking drivetrain parts? Im not sure about it all.:confused:

[BlazeGM4]

What parts are leaking? front or rear diff? t-case, tranny?

[christja]

yeah, the front of the rear diff, and the transfer case. The tranny is only about 20,000 miles old, its fine.

[TAZZ9963]

As for the transfer case if it's leaking where the drive shaft is thats not a bad fix. Drop the drive shaft and pop out the seal and replace, make sure you clean the yoke before you put it back into the transfer case and I always use a little general purpose grease on the seal so it won't be dry when putting in the yoke of the drive shaft. Sometimes the yoke is worn and you have to replace that. Yokes aren't that pricey and it's the perfect time to replace your u-joints too.

Dan

[christja]

What about the rear diff? any tips?

[BlazeGM4]

I'm not sure about the full floating axles, but if it were a 10-bolt diff you'd have to pull it all apart to replace the rear pinion. Pull the cover, drain the oil. Remove the cross pin bolt (be VERY careful not to snap it cause it's not easy extracting it one you do....experience speaking) Slide out the cross pin, push the axles in to remove both c-clips then slide them out of the way. Unbolt the carrier (making sure not to lose any shims from the side gears) Remove the driveshaft and remove nut holding the pinion gear in and pull it out, then you should be able to replace the pinion seal. I've probably got something wrong somewhere but i'm sure someone will correct me. I'm fairly certain the pinion gear has to be removed in order to replace the seal but i've never replaced one before. And since you're a 3/4 ton you probably have a full floating axle. Hope this helps.

[BlazeGM4]

http://www.universityofjeep.ca/pinion_seal.html

Link for 14-bolt pinion seal replacment.

[grancito]

there is no need to strip the diff, just remove the drive shaft and yoke and there is space to put a large screwdriver in to remove the seal.

[jdozier]

OK, I have a 2500 CK and it appears that mine is actually leaking trans fluid from the end of the yoke, I have already replaced the Tranny seal around the drive shaft input.
Anyone seen this before...?

[TAZZ9963]

Replace the yoke. They are not that expensive.

[grancito]

mine has leaked for years, there is a saucer type metal plug in the end, that needs to be hammered, but it is necessary to remove the u joint to get at it.
Try some epoxy down the inside.