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Transfer Case Rebuild - What a Mess

Jawa

NAXJA Forum User
Location
Aurora, CO
This week I decided to rebuild my tcase in an attempt to resolve some harmonic vibe/howling problems I've been dealing with for months. After having all new gears and bearings put in both axles, hub assemblies replaced, rear wheel bearings replaced, front driveshaft u-joints replaced, rear u-joints greased and inspected, and driveline angles checked, I figured the tcase might be my problem.

DutchVDub was nice enough to help me, so I headed up to his place on Monday. We got everything apart and realized the input bearing in my rebuild kit was wrong. Of course we didn't find that out until it was way too late to find a replacement anywhere... I had to call someone to pick me up and loan me a car so I could get home that night.

Next day I took off work early and returned the rebuild kit. The shop that sold it to me couldn't source the correct input bearing after 45 minutes of trying. I didn't have any better luck calling NAPA and the other stores. The bearing is special order everywhere. Since my rig is my DD and I need to get my loaner car back ASAP, I picked up some used tcases from Stang5lgt and figured I'd just swap the whole back half and be done with it.

Well... after comparing the tcases from Stang to mine, we figured that I probably could have used the rebuild kit and the different bearing in the first place. So we figure since everything is apart we really ought to do it right and rebuild everything rather than slap two used tcase halves together. I keep the loaner and drive home without my rig for a second night...

The next day I re-buy the rebuild kit, but also talk to a tcase/tranny specialist and find that the different bearing won't work after all. Thankfully that guy had the right bearing on hand, so I went and picked it up along with the rebuild kit. I head up to Dutch's and hallelujah we get everything back together and in the Jeep. Then we go to fill it up and I strip the fill plug... Friggin' great! Thankfully Dutch had an extractor kit and was able to get it out. Then we ran into our next problem - no pump or tubes or anything to get ATF into the tcase. It's getting really late at this point, so we roll my Jeep into the street so Dutch can call it a night and I head out to the closest 24 hour Walmart. I finally found something that did the trick and got the tcase filled... at 1:30 in the morning.

I still have the loaner, so I had to leave it at Dutch's and drive the Jeep home. I'll go back tonight with my wife to pick it up and return it.

In summary, this tcase rebuild required:

2 days and 3 nights of my heep sitting in Dutch's garage
4 100-mile round trips to Dutch's... in a 70s F250 that gets about 8 MPG (my loaner)
3 trips to Drivetrain Industries to buy, return, and re-buy the rebuild kit
1 half day off of work
and a TON of inconvenience for everyone involved... Dutch and his wife, my father-in-law (who loaned me his truck), and my wife.

Sorry for the loooooong post. I felt like ranting about this! ...and the best part about this whole thing? It didn't fix my problem!! :flamemad: Two of the bearings we pulled out were bad, so at least the effort wasn't entirely wasted. Back to the stinkin' drawing board!
 
Well Josh, I gotta tell ya - you've had some pretty fawked up experiences with that rig of yours. I give ya props for sticking with it - many have given up long before things got that bad. I can only hope that you'll hit a nice downhill stretch with the rest of your modifications for your rig.

The next time you find yourself down south, be sure to call - I'd like to hear/feel the noises/vibes you're talking about and see if I can come up with a cure for ya...... :dunno:
 
Here is my cure:
grenade.jpg


:D
 
I've spoken with Joshua at Crawlertech and he's willing to take a ride and give me his opinion. He's got something he called a "chassis ear" that should be able to pinpoint where the problem is. He offered to do it free of charge, but heck, at this point I'd happily pay a shop hour for his time. I just want this fixed!
 
Well heck, you can't go wrong there! :thumbup:
 
That's what I'm thinking. :D With the way things have gone with this rig, maybe I should invest in one of those chassis ears!
 
The tires are really noisy too. They're my second set of MT/Rs - my first set was really quiet, these are noisy as hell. The vibe/whine problem has been around since before I got my current set of tires though. Unfortunately I can't place the blame on 'em.
 
I've spoken with Joshua at Crawlertech and he's willing to take a ride and give me his opinion. He's got something he called a "chassis ear" that should be able to pinpoint where the problem is. He offered to do it free of charge, but heck, at this point I'd happily pay a shop hour for his time. I just want this fixed!

Josh is a good guy, I would trust his ear. :thumbup:

Hope you can figure this out.
 
Sorry to hear about your problem......... I had something happen just like that with mine!! When I first bought my rig it had a homemade SYE and the output shaft was too long which flexed and vibed! I then bought a used case that had a RE H&T on it and installed........ damn DS that came with it was bad..... $320 later I had a new flanged shaft..... still getting some vibes after that!!! By now I was getting very frustrated!!!! Well, that case had bad bearings, so swapped the original back in with the output from the used one. Things were much better at that point till I swapped on a Warn hub conversion and this is where it gets weird. With the hubs unlocked and driving down the highway at about 55 I would start getting a really bad vibration from the TC.....?!?!?!? Well, after going through everything, including tearing apart my TC several times, I had a odd stroke of luck. A race spun inside the drivers side Warn hub and I said XXXX it and bought new unit bearings to replace the hub conversion....... NO MORE VIBES!!!!! By now I was scratching my head goin WTF just happened here!! For some stupid reason I would get vibes from my TC with the Warn hub conversion on and unlocked freeing the front half of the drivetrain.............?????????:banghead:
 
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