Nissan 370Z Forum - View Single Post - VHR + FD Gear Ratio upgrades

Zat_Zuma · 02-04-2011, 08:44 AM

No matter what they say about gear whine being within specs, its bogus.
The backlash (pinion gear) is out and needs to be redone. The amount of different shims available for the diff makes the excuse given; bogus. The adjustments are time consuming and require very meticulous measurements. My diff had zero issues and no whine at all until I broke it.
The clearances were done to my specifications and the backlash was perfect. It took the master technician a full day to rebuild it and to get it right.

With the 4.083 gears the clearances and backlash must be better than factory specs or you will get a small amount of gear whine. Compare the factory specs on a frontier with 4.083 gears, 350Z with 3.5 gears and our 370Z's with 3.7 gears and look at the differences.

But since you trust your shop and seem to be happy with their work, I really don't see why you are complaining if your leaving out imortant info and are satisfied with what you have.

02-04-2011, 08:44 AM	#153 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	No matter what they say about gear whine being within specs, its bogus. The backlash (pinion gear) is out and needs to be redone. The amount of different shims available for the diff makes the excuse given; bogus. The adjustments are time consuming and require very meticulous measurements. My diff had zero issues and no whine at all until I broke it. The clearances were done to my specifications and the backlash was perfect. It took the master technician a full day to rebuild it and to get it right. With the 4.083 gears the clearances and backlash must be better than factory specs or you will get a small amount of gear whine. Compare the factory specs on a frontier with 4.083 gears, 350Z with 3.5 gears and our 370Z's with 3.7 gears and look at the differences. But since you trust your shop and seem to be happy with their work, I really don't see why you are complaining if your leaving out imortant info and are satisfied with what you have. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD Last edited by Zat_Zuma; 02-04-2011 at 03:54 PM.