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jmikes · 02-26-2022, 06:23 PM

You will need to do a swap to a manual diff to change the gearing sadly, but I've done a manual diff swap, it's easy and fits just fine on the AT. Relatively cheap too. As SG4247 said, you will need to buy a different stub shaft for your left axle. (EDIT: You also want to get the matching right stub axle, as the AT one isn't long enough to actually make use of the VLSD inside the diff and won't be held in fully by a retention ring.)

Personally for the auto I wouldn't recommend 4.08's, I'd go 3.9 at most. The gear ratio for 1st and 2nd gears is very, very high in the AT, and I'm confident that 4.08 would be overkill and result in major traction issues when flooring from a standstill even with the VLSD.

02-26-2022, 06:23 PM	#12 (permalink)
jmikes Base Member Join Date: Dec 2021 Location: Florida Posts: 10 Drives: 17 370Z Base (AT) Rep Power: 4	You will need to do a swap to a manual diff to change the gearing sadly, but I've done a manual diff swap, it's easy and fits just fine on the AT. Relatively cheap too. As SG4247 said, you will need to buy a different stub shaft for your left axle. (EDIT: You also want to get the matching right stub axle, as the AT one isn't long enough to actually make use of the VLSD inside the diff and won't be held in fully by a retention ring.) Personally for the auto I wouldn't recommend 4.08's, I'd go 3.9 at most. The gear ratio for 1st and 2nd gears is very, very high in the AT, and I'm confident that 4.08 would be overkill and result in major traction issues when flooring from a standstill even with the VLSD. __________________ 2017 370z 7AT (Metallic Black) Stillen / ISR / PowerTrix / Morimoto / DAR / Enkei / Akebono / DBA / Michelin Last edited by jmikes; 03-12-2022 at 06:20 PM.