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Old 03-17-2021, 08:17 PM   #3
Mathew21
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Join Date: May 2010
Location: Clinton township, MI
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Re: 4wd rear axle direct bolt in in 2wd Pickup?

Quote:
Originally Posted by hatzie View Post
The spring perches and shock mounts should be the same.

Get one with the same gear ratio. You can re-program your PCM for the new ratio with a tuner and maybe the ABS controller with a Tech2 (I'm not positive you can do the ABS without a new CAL from GM) but why make it more difficult than it needs to be.
Look on the SPID in the glovebox for the gear codes.
https://www.crawlpedia.com/rpo_axle_codes.htm
Thank you I appreciate the information.
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