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Old 07-22-2013, 09:49 PM   #1
FLYNAVY30
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rear gears?

C20 w/ 402 and auto trans, 2wd. Any idea what gears are in the factory rear end?
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Old 07-22-2013, 10:15 PM   #2
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Re: rear gears?

What year truck?
What model rear axle?
GMC or Chevy?
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Old 07-23-2013, 11:25 AM   #3
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Re: rear gears?

SS TIm has Power Team Charts posted in this thread.

It looks like, if it has a Dana 60 axle, it could be a 3.55:1 or 4.10:1

If you have an Eaton axle the choices would be 4.10:1 or 4.57:1
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Old 07-23-2013, 06:26 PM   #4
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Re: rear gears?

1972 Suburban C20....Dana 60
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Old 07-23-2013, 09:54 PM   #5
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Re: rear gears?

looks like the 3.55:1 Thanks very much for the help!
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