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Showing results for tags 'ring and pinion'.
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If you read this Moses, many thanks for your Dana 30 rebuild article, it's the only one I've found that helped me. Here is my problem in a rather large nutshell. 1995 YJ, 2.5 5spd. I had an axle seal leaking and bad lower ball joints so I figured it would be a great time to upgrade to 4:88 gears and 4340 axles since I am rolling 33-12.50's. I opened up the diff to find a recent but very poorly installed 4:56. The caps were on upside down and it had about .100" backlash so I am essentially starting from zero. The carrier bearings appear to be original so I am fairly sure the shims are close but I am making a set of test bearings for all positions. There were no shims behind the forward pinion race and only the slinger behind the bearing, probably the culprit of the massive backlash. The pre-load shims are another issue. It appears the installer used all the shims he had and all that were on it originally. The original shims (determined by some discoloration) stacked to .057", He or she added another .041" to stack out at .098". I can do all the setup and the new gears have the pinion depth marked so I know what to shoot for, my question is what ballpark the pre-load shim pack should be in to start the setup? If I read correctly, the torque for the pinion nut is 160-200 ft/lbs so I know if it gets too tight before I hit 160 there are too many shims and if it hits 200 and doesn't have enough pre-load, not enough shims. I would just like a good spot to start. I am using a Motive gear set if that makes any difference. Thanks in advance to whomever might be able to help. I'm sure the Dana 35 in the back is in similar condition so any help will be greatly appreciated. I would also like to mention how awesome it is to find a forum that is just simple and to the point without all the smells and bells to stagger my poor old Dell to a standstill! -
I am currently in the process of fitting a ford 8.8 with the necessary brackets to fit under the rear of my 01 Jeep TJ. In the interest of keeping cost down, I have decided to simply regear my front dana 30 to match. But before I run out and buy parts, I have a few questions. 1st, is that my rear 8.8 is a 4:10 ratio, and most sets I see for the 30 are 4:10 as well. I have been told that I have to offset my front to a 4:11 for some reason, but no one can explain why. all I've heard so far is that a 1% offset in ratio is "ok". is a matched ratio ok as well? if not, what do I do about this? 2nd, I believe that my current gearing in the D30 is 3:07. it is my understanding that I will have to swap to a different carrier to accommodate the 4:10 gearing. I have found carriers for roughly $100, but they are bare. What do I need in addition to the carrier and R&P in order to install into my housing?
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