Changing Gears
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Senior User
Joined: Jan 2009
Posts: 261
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From: Red Deer, AB
Changing Gears
anyone have some good resources, pics and instructions on how to change my gears in my rear end, i would like to go to a 4.10 or 4.30 from 3.73 and i know there is some shimming to do to ensure that the gears mesh properly and i dont want to fudge it. thanks.
Cross-Country
Joined: Dec 2008
Posts: 62
Likes: 0
From: Valley of the Sun
37 / 31.6 = 1.17
1.17 x 3.73 = 4.36
I tow a pretty heavy fifth wheel and it made all the difference in the world.
As for the install, it is not terribly hard, but you have to have some special tools and a little bit of know how. If you have not done one or two, or have a buddy that has done them, I would pay to get it done. I did and I have all of the above but still paid. Never enough time in the week. Either way, you will notice the difference on the first drive.
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
I did mine myself, it was a pain in the @$$. I had to pull the pinion bearing and change shims probably 4-5 times. You need a press, good bearing puller, dial indicator with magnetic base, large race drivers, and a lot of time and patience. I'm guessing yours is 4wd? So you need to change your front gears too, not just the rears. With 37s, 4.30s would be back to the stock ratio, 4.56 would be a little low for running over 65 on the highway. I did a lot of reading ahead of time, the Differentials book from Randy's Ring and Pinion is a great resource.
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