My Willys 3A and 3B Community
TECH FAQ SECTIONS => Gearboxes and axles => Topic started by: Kelley on May 20, 2024, 01:20:43 PM
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Can someone remind me what I'm shooting for:
Have a Dana 44 rear. Completely disassembled and being overhauled. Have new pinion bearings - 0.032" shim pack on the inner bearing and I'm setting the outer shim pack: the original shim pack was ~0.060". I started out on the new bearings by reusing the original shim pack. I was getting >40 inch pounds of rotational torque on the yoke (just the pinion, bearings, yoke, washer, and nut - no seals). Had it in and out to adjust the shim pack a few times thinking that my goal is to achieve between 12 and 20 inch pounds.
Shim pack --> Torque
0.076" --> almost nothing
0.068" --> 8 to 10 in-lb
0.064" --> 26 to 30 in-lb
is between 20 and 30 in-lb ok on new bearings? or too tight?
thanks
-Kelley
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Nevermnd,
Found a combination that worked to get the preload to ~22 in-lb. Within spec according to the manual (10-25)
Kelley
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Ok,
Got another one: like many of you, I've been grateful for Brian Hainer (@metalshaper) for the information in his videos. Following his D44 rebuild, he tightens the pinion nut to 100 ft-lbs in order to test bearing pre-load.
Manual says to tighten to between 200 and 220.
Presuming I should stick with the instructions from the manual. thoughts?
-Kelley
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Once again answered my own question: No real difference in rotational torque when I tightened the nut to 200 ft-lb. If it's shimmed right, it's shimmed right.
Hopefully this helps someone.
-Kelley
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Wondering how we feel about this set up:
Ring gear backlash: 0.007"
Pinion preload: ~0.025 in-lbs
I had to raise the pinion in the case from .032 (original inner bearing shim pack) to .058. Does anyone think it needs to come in further?
Drive Side:
(https://www.mywillyspics.com/images/2024/07/09/IMG_7551.jpg)
Coast Side:
(https://www.mywillyspics.com/images/2024/07/09/IMG_7553.jpg)
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Ok,
Got another one: like many of you, I've been grateful for Brian Hainer (@metalshaper) for the information in his videos. Following his D44 rebuild, he tightens the pinion nut to 100 ft-lbs in order to test bearing pre-load.
Manual says to tighten to between 200 and 220.
Presuming I should stick with the instructions from the manual. thoughts?
-Kelley
i'd go with the manual. at 100 pounds i didn't know my top pinion baring was bad. glad i went above that to find out
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I missed a lot of this while in the penalty box. Unfortunately, I've never done this. I've always hired out to axle experts as I'm sure I'd mess it up somehow. I will say I've successfully rebuilt the inner differential case (where the "spider gears" live) as the side gear tolerance was too large. I hired out to get the ring/pinion set. It works but haven't road tested (speed/distance) yet.
Earlier question asked about 100 ft-lbs.
Following his D44 rebuild, he tightens the pinion nut to 100 ft-lbs in order to test bearing pre-load.
As I'm reading it, it seems you're relaying that he is using that lower amount to "pre-load" test. Did his information continue to say that is the final torque or does he use the Service Manual value?
I agree that the SM should be first. There would have to be a significant shift in technology to deviate (here I'm thinking lubricants mostly). I don't think changing torque values is good.