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05 vs 07 on rpm's

759 Views 11 Replies 4 Participants Last post by  tramp_line_ape, 
tramp_line_ape
my brother has an '05 QCLB CTD with a G56, 285/70r17 cooper atr's. i have an 07 QCLB CTD with a G56, 285/70r17 cooper atr's. both 3.73's. why is at 2000 rpm i'm at 75 and he's at 65. the speeds are exact, but i'm at right around 75 at 2k and he's right around 65. what's the deal? is it gearing in the transfer case?
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BigB82789
I think someone has different gears than what they think. Im at 65 at 2000 rpms with 285/75/16's and 4:10's.
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BigB82789
They make 3.42's for those axles..
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