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Thread: g80 is done!!!!! Suggestions on good replacement!

  1. 04-20-2011 01:25 PM #11
    tanz45's Avatar
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    Yes, pull front shaft.

    X2 on a factory 4.10 diff. Not a z71, but a V-max truck. They had 4.10's, i don't believe a z71 ever came above 3.73.

    As of tips, get a few extra crush sleeves and take your time. Start out using your stock shims on the pinion and carrier if you can. Went from 3.42's to 4.10s with a yukin posi. Used the stock .035 pinion shim depth (new shim) and even got lucky by using the stock carrier shims. Came in at around .007/.008. Not 100% sure, it was a few months ago.

    There is also a trick to the pinion preload. Once you think you have it, put a 1/2 breaker bar on the pinion nut at horizontal, let it go and is should fall at a medium rate. How Chris did mine and never made any noise
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  2. 04-20-2011 07:03 PM #12
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    im in shock id a z71 never came with 4.10s...

    thats vary by weight of the breaker bar. but itd be close enough
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  3. 04-20-2011 09:57 PM #13
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    Quote Originally Posted by kyhunter89 View Post
    im in shock id a z71 never came with 4.10s...

    thats vary by weight of the breaker bar. but itd be close enough
    There were plenty of Z71 and even 4x4 non Z71 1500 trucks with 4.10s. I've even seen them in Suburbans and Tahoes.
    Last edited by PitchBlackC3; 04-21-2011 at 03:13 PM.
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  4. 04-20-2011 10:05 PM #14
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    molitor is offline Looney Tuned
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    Auburn Gear makes an awesome limited slip differential with a torque lock feature. And they really last. If you want the benefits of limited slip with trutrac locking when you want to gouge the floor with the gas pedal, they are a good choice.
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  5. 04-21-2011 02:03 AM #15
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    Alright, thought I was nuts for a bit
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  6. 04-21-2011 02:28 AM #16
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    What is the down side to trutrac in the snow I know some people have said thats on downside? Something better for the snow out there?
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  7. 04-21-2011 04:06 AM #17
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    Be easy to turn sideways with, great for straightline traction no matter the terrain
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  8. 04-21-2011 08:45 AM #18
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    Quote Originally Posted by PitchBlackC3 View Post
    There were plenty of Z71 and even 4x4 non Z71 1500 trucks with 4.10s. I even seen them in Suburbans and Tahoes.
    Awesome. Now i know.
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  9. 04-21-2011 09:11 AM #19
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    Quote Originally Posted by tanz45 View Post
    Awesome. Now i know.
    our 02 tahoe 4x4 with airride has 4.10s.... it's fun (not a z71)
    blown transmissions are about as useful as 97% of the guys on this forum
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  10. 04-22-2011 07:43 AM #20
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    Ok guys. 8.5 r 8.6 most people are telling me they are the same. Some say I need 8.6 can someone shed some light on this. 30 spline correct?
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