Gear Swap

[Some Random Guy]

Ok, so I just finished tearing down my rear diff after my second failure. I did some measurements on the way out, but forgot to run a pattern:
Pinion Torque to Rotate: 0 in-lbs/6 in-lbs
Total Torque to Rotate: 8 in-lbs/12 in-lbs
Also, about 3 Pints of oil came out.

This was after I was not refunded for the first failure. The shop told me it takes 2.5-3 QUARTS of oil (5-6 Pints) and that's why my regear failed. They didn't want to hear about it being incorrect, they just wanted to blame me and said I cooked the bearings by messing up the post break-in flush. I should have had the confidence to walk away, but I let them re-do the rear at a discount. 100 miles later, same problem. Howling rear end on coast side. I brought it back, they said it was just a louder set of gears and nothing was wrong. 2 shops diagnosed pinion issues after ride-alongs. Which lead us to these specs.
So obviously something went wrong with the pinion again. The carrier preload looks to be within the right range and would have been fine if the pinion was pre-loaded correctly.
Hopefully I get it right tomorrow! I still have to clean everything, cut off the old bearings from the carrier, and remove the pinion.

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[Some Random Guy]

The plot thickens, they put shims underneath the bearings. Not between the case and the bearing.

 

[CarbonSteel]

As far as capacity, they are full of bovine scatology. I have not seen a front M210 that has held more than 1.3- 1.5QTs or a M220 that has held more than 1.4-1.6QTs.

Would love to know where they are seeing 2.5-3.0QTs and what axle cover allows for that capacity.

 

[Some Random Guy]

As far as capacity, they are full of bovine scatology. I have not seen a front M210 that has held more than 1.3- 1.5QTs or a M220 that has held more than 1.4-1.6QTs.

Would love to know where they are seeing 2.5-3.0QTs and what axle cover allows for that capacity.

Judging by the shims beneath the bearings, the quoted capacity being in line with a JK, I think it's been 3 years and they still haven't realized the JL D44 Advantek is not the normal D44. They've gotten complacent and aren't about to admit mistakes.

 

[CarbonSteel]

Judging by the shims beneath the bearings, the quoted capacity being in line with a JK, I think it's been 3 years and they still haven't realized the JL D44 Advantek is not the normal D44. They've gotten complacent and aren't about to admit mistakes.

Part of the problem with Advanteks IS the reduction in oil capacity from the JK series and the increased heat they generate--neither of which is conducive to long axle life, long OCIs, or using the oil viscosity that FCA recommends over Dana (75W-90 vs. 75W-140).

 

[fat_head]

Yeah, your specs as installed are quite a ways off. Carrier shims inboard or outboard shouldnt really matter, they perform the same function in either place. It's just way easier to put them outboard to make installation easier. As for oil capacity, fill it till it comes out the fill hole. You'll be close enough.

Here's the Dana specs for your reference if you dont have them.

https://d3qx1uccksbb2n.cloudfront.net/docs/SPECSHEET-JL-REAR-UD44A-D44A-42019.pdf

 

[Some Random Guy]

I had a dumb moment today and pressed on both carrier bearings without the locker. I had to go rent a puller to get it off. It worked because the locker was out of the way though. Lost a few hours to that. We lost the natural light before I could get a pattern. I'll have to examine it in the morning. I'm worried I have a bad gear though, one tooth had a totally different patter than the others on one side. Pictures tomorrow at some point.

 

[Some Random Guy]

I have a rotational clunk, seems to be ring gear related. I ran a broader pattern and found this. If this is the clunk, it’s my fault. We were tired and couldn’t get the pinion flange on. Our “brilliant” idea was to put the carrier in to hold it and get it tapped down enough to thread the pinion nut on. Here’s my other suspicion:

I already posted this in ChevyMitchell’s thread.
I’m fairly sure it’s our fault. Too bad, we seem to have the pinion depth and carrier shims right on the first pattern, even if it wasn’t the first try. Oddly I’m not upset if I have to do it again. The learning was awesome for all of us.

 

[Suffolklou]

What shop did the first two?

 

[Some Random Guy]

What shop did the first two?

Randy’s Worldwide. Otherwise known as Yukon Gear and Axle/USA Standard Gear/Zumbrota.

 

[word302]

Judging by the shims beneath the bearings, the quoted capacity being in line with a JK, I think it's been 3 years and they still haven't realized the JL D44 Advantek is not the normal D44. They've gotten complacent and aren't about to admit mistakes.

I would demand my money back for everything they did.

 

[Some Random Guy]

I would demand my money back for everything they did.

I’m headed down there at some point to show them everything. The head bearing looks like it has 100,000 miles on it, it only had 200.
Hopefully they’ll negotiate and not just stonewall me. I’m prepared to make social media accounts to post my experiences.

 

[Suffolklou]

Thanks, I will steer clear of them.

 

[Some Random Guy]

I didn’t catch this at first, but here’s one of my carrier bearing races from the shop install.

No wonder it was making noise.

 

[BuyHold]

Ok, so I just finished tearing down my rear diff after my second failure.

Sorry to hear this. Real bummer. For those in Puget Sound area, sounds like we should all stay away from this installer. Two failures too many with customer blame to boot.

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