Advanced Engineering Tech - Folks who build their own 12 bolt and run a M6 trans please come in.

I currently have a M6 car with a 12 bolt and 4.10 gears that was set up by Strange but has busted the ring and pinion. The car has 419 rwhp with 390 rwt, cutting a 1.6 60' leaving around 4000 and I'm using a M/T ET Street tire. My question is how do I need to set up this rear end so that it will survive? I'm sure there are folks that have figured out how to keep these rear ends alive with 6 speeds, 12 bolts and more power than I have. Do I need to tighten up the backlash to prevent tearing up the ring and pinion? or what? The car is street driven some but not a daily driver at all, just an occasional cruise or True Street cruise.

Thanks for any help I can get with this.

All I can really say is try a high end gear thats designed with drag racing in mind. Not much else you can do.

Help???
Maybe, try the correct forum?????????????

It sounds like you got a bad setup or bad gears.
I'd ask them what back lash they set them too and why.
Tom's Differential told me to set mine to .005ish so that the break in/hard launch will move it to the recm. .007. -That's with a 3.07. 4.10 might be a little looser to allow for more heat.

Stock 12's can handle that power. It's stock LS6 454 territory.