Re: Which axle 3.08 or 3.42?
Thanks for the info. The 265/65 R18's on the 2012 and the 265/75 R16's on the '99 both have a dia of 31.6". With your smaller tire dia, your overall ratio will be a little lower. I'm curious, do you use the manual button much? If I get the 3.08, and it turns out to be a little too low, I may use the manual +/_ button to drop down a gear on hills. Have you tried that?
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72 GMC Sierra Grande SWB 402 BB A/C
(Owned it since 1973)
99 Silverado 1500 LT with 315K miles
(RIP)
2012 GMC Sierra SLT
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