Ok guys I know this subject has been beat to death, but I want to know if there is anything about 4.10's that make them mechanically weaker? (more torque multiplication?) Let's say I drive the car (M6) the same way I do now, NO track time, very few hard launchs all <4000rpm, NO slicks ever is there any reason for anything to be any easier to break than with my 3.42's? This is a 2001 WS6 and will never have more than full exhaust (lt's, catted Y, catback) and maybe a mild cam in the future, maybe at most 350-370 rwhp. All I want is to up the fun to drive factor. Thanx!!

 

Than put them in

 

Also is the TA cover worth it, I was thinking about buying the kit from thunder racing. Is there any makes of gears I'm gonna have better luck with in the stocker?

 

As the gear ratio becomes higher the pinoin gear becomes smaller. THis is why the bigger gears become weaker.

 

What was said above is true... the pinion gear is much smaller with 4.10s in a 10 bolt, and hence are more fragile and prone to breakage. The fun factor is definitely there, though and as long as you don't beat on it with slicks and 5k clutch dumps, it should hold out for quite a while.

That said, I would still invest in some good suspension mods to take the flex out of the drivetrain as much as possible... things like an aftermarket torque arm w/poly bushing, beefier LCAs and rear sway bar w/poly bushings & endlinks, and a poly trans mount all help reduce flex and wheel hop, which will absolutely kill a stock 10 bolt.

 

I have a T/A cover does it help can't really say, my rear was quiet as stock till I started doing clutch dumps on DR's now it has picked up a pronounced whine in the 45 - 65 MPH range, that said tires make all the difference especially when you get up on the power levels street tires and the first three gears are fun but there is no traction.

 

Thanks guys thats what I wanted to know.