H3 Transfer case issues

[H322]

Today while driving to lunch smelt something burning looked down and service 4x4 was flashing pulled over turned the h3 waited a few minutes started it back up warning did not flash and all seemed well. Decided to take a look underneath and this is what I found.

Is this just a seal gone bad or something major? Thanks for any help in advance


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[alrock]

Looks like a bad axle seal and would be unrelated to the error message you saw earlier. It would be good to check the fluid level in that front diff. It's probably fine, but it's worth checking too.

It does look like your crossmember bushing is shot which will lead to wear and tear on the diff and/or the propshaft. If memory serves me correctly, the bolt should not be hanging that low.

I don't know what caused that error, and the burning cause could be a symptom or be unrelated. Keep an eye on it.

 

[H322]

I thought that same about the axle seal but seems to be leaking from front seal. If I decided to replace the seal what would be the process for that? Any special tools required? Also how do I go about fixing the crossmember bushing? And where is he best place to order the parts. Thank you for your help also where is the fill plug to check the fluid level? THank's again


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[Happy Hummer]

Looks like the fill plug is on front of diff in first pic part way up cover.
You can repair the crossmember or replace. There are threads covering this in great detail.
The seal is leaking as you stated. You'll replace it with new parts purchased online through one of the sites selling such as nalleygmc or the like.

 

[alrock]

If it's the fill hole, remove the fill plug, check the level and top off if necessary, use some thread sealant, and close up. If it's the diff cover, buy the seal from a dealer or online parts supplier or use a silicone sealer from the auto parts store. For the crossmember, look in the sponsors section and then PM Preferred Chassis Fabrication.

 

[650Hawk]

The burning smell could be from the leaking fluid getting blown back onto exhaust components. Just a thought.

 

[4speedfunk]

Well...that looks like a bunch of oil dripping off the axle tube, about mid-span. I can't imagine it came from inside the axle. Perhaps from something else is leaking and splashing onto the axle tube. Power steering perhaps? Front seal on the motor? The wet spooge on the front cover gasket also looks like it could have migrated down from somewhere else...again possibly from above. You might check your radiator (and water pump) for leaks, too as it would blow back onto all this stuff. Can you make out what type of fluid it is?

H3's come with reusable cover gaskets on both axles. They are basically GM versions of Lube-Locker brand and unless you really mangle one...they last for a very long time and seal up great.

Regardless...none of the wet or leaky stuff in your photos would induce a dash-light. That is most likely from a totally separate t-case issue.