VHR + FD Gear Ratio upgrades - 3.9 and 4.08

L33T Z34

The whole rear differential part numbers:
370Z, auto trans, 2 pin rear final drive: 38301-EG33D (OCT 08 - AUG 14?)
" Viscous LSD: 38301-EH33D (OCT 08 - AUG 14?)


370Z, auto trans, w/2 pin internal rear differential part numbers:
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38220-1NC0A x2 flange assy, right & left side
38342-P9010 x2 seal-oil, diff side
38440-0C000 x2 bearing, diff side
38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects)
38421-0C00A case-differential (this is the open diff, replaces the Viscous LSD or will be replaced w/an aftermarket clutch locker)
38427-0C000 shaft-pinion mate
38425-21W0A pinion-mate
38423-0C00A gear-side
38426-21W00 washer-thrust, pinion mate
38424-0C000 washer-thrust, side gear
38428-U1500 pin-lock, pinion shaft
38225-40P71 circlip-side gear
38102-7S000 bolt, drive gear
38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to)
38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects)
38120-EC000 bearing-drive pinion, rear
38165-0C020 spacer-housing
38140-0C000 bearing-drive pinion, front
38189-P0117 seal-oil, drive pinion
38210-EC020 flange assy, companion
43262-01P1A nut-drive pinion
38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK)


370Z, auto trans, w/LSD internal rear differential part numbers:
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38220-JK01A flange assy, right side
38220-JK01B flange assy, left side
38342-P9010 x2 seal-oil, diff side
38440-0C000 x2 bearing, diff side
38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects)
38420-2C000 case-differential entire viscous assy (crap, this part is unique to the auto trans LSD and the reason why final drive gears can't just be bolted in; replace this w/an aftermarket clutch locker)
38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to)
38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects)
38120-EC000 bearing-drive pinion, rear
38165-0C020 spacer-housing
38140-0C000 bearing-drive pinion, front
38189-P0117 seal-oil, drive pinion
38210-EC020 flange assy, companion
43262-01P1A nut-drive pinion
38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK)