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Old 05-11-2013, 02:43 AM   #1
Crash20657's Avatar
Join Date: Sep 2011
Location: southern md
Posts: 25
bearing preload?

So... im on my second attempt at regearing my rear axle, a dana 35. Learned a lot on my first failure, so now I have all the right tools and some experience. But I cant seem to find any info on what the rotational force of the yoke is supposed to be w all components installed and correct backlash. Guess im looking for the carrier bearing preload settings. I know the pinion is set at 6"lbs but once you add the carrier the force required changes. whats this total force supposed to be. I don't plan on buying a third set of gears. 2 is enough.

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Old 05-11-2013, 02:06 PM   #2
Join Date: Oct 2011
Posts: 2,280
According the 2003 FSM, the rotational torque for the differential carrier (axles not installed) should add 7-11 ft/lbs to the torque for the pinion shaft alone. With new bearings, the pinion shaft torque should be 20-35 in/lbs. (Not 6 in/lbs.) 10-20 in/lbs with original bearings.

Originally Posted by Crash20657 View Post
I don't plan on buying a third set of gears. 2 is enough.
Then you might want to consult the FSM. It's amazing the sort of useful and accurate information you can find there.

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Old 05-11-2013, 02:29 PM   #3
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Join Date: Mar 2011
Location: Longmont, CO
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Pinion preload for new bearings should be in the 20 in/lb range! I also don't think there is a need to measure preload of everything. As long as it took 3 or 4 good whacks with a dead blow to fully seat the carrier you'll be fine.

If you ran 6 in/lb of pinion preload on the first gears that was you issue. Increase it to 20 in/lb and you'll be fine.
CU Boulder Aerospace Engineering
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