onefast99ss

I wanna do 4.10's in my 99 M6. I just wanna know what RPM i would be cruisin on da highway at 70-75 in sixth gear. Let me know.

Tranzor

Roughly, about 2k rpms at 70, about 2.2k at 75...

BlueSix

1900-2000 RPM's @ 70-75.

onefast99ss

thanx, how big of difference do 4.10's make on your 1/4? are they worth getting or are there any downfalls to them??

Tranzor

They make a HUGE difference in the way the car feels and how it accelerates... much better in both regards. I'll have some 1/4 mile times the first week of April once the tracks open up again out here.

The biggest downfall is with the 10 bolt rear end... with sticky tires, a high RPM launch, and 4.10s you can grenade it. Also, wheel hop will kill the 10 bolt, especially with the smaller 4.10 gears... so you'll need to set up the suspension as best you can to eliminate wheel hop (things like LCAs and a new torque arm).

onefast99ss

thanx man

ZR2877

I wish I knew what 4.10s felt like. I think the guy that installed my gears installed 4.56s. If they are really 4.10s I hate them.