shutzero

when i bought my car about 7000 miles ago it had a brand new eaton posi and brand new GM 3.73 gears put in. im wondering how strong my rear end would be comparable to a 12 bolt or 9"...ive heard the stock fbody rear ends can blow on just one brakestand so i just want to make sure my car can make it through the season (10-15 track days) without having to worry about my rear end going

myltwon

iTrader: (1)

since you have 3.73's I'm assuming you have an auto. with your mods I wouldn't worry about blowing the rear out

RamAir95TA

iTrader: (2)

I'm going to have to disagree. 15 track days is 3 to 4 times a month and probably 45 to 60 passes. It only takes one solid hook. While he isn't heavily modded, the constant hard launching can gradually weaken the ring gear. I wouldn't say he shouldn't worry, but it is something to definitely keep on the front burner. It's solely based on chance.

2XR95Z28

iTrader: (4)

I have close to 100 passes on my 10 bolt with a LPW girdle and easily half those were with ET street and flashing my 3200 vig stall... You'll be alright, and if not pick up an extra 10 bolt, i got one in my garage and another lined up i can get...

fergymoto

iTrader: (129)

You should be fine if your car is automatic. I have been doing low 1.6 short times on my 10 bolt for a couple years now and I go to the track quite a bit. It is all stock with 3.42s and a Torsen carrier because I kept wearing out the clutch packs in the factory Auburn posi units. Car weighs 3600lbs with me in it. 1.60 on its good days 1.62-1.63 on its bad days.

I do have a spare, but have yet to need it.

joelster

Just make sure you pre-load the car on the launch. You want your left foot on the brake and the right on the gas while the yellows are coming down. The 10-bolts usually break with the M6 guys when do a really fast hard launch by popping or side-stepping the clutch. The rear-end goes from full-loose to WHAM full power, and it snaps the teeth off. You can do this with an auto also if you are at an idle and then just mash the gas, but the converter will take some of the hit of the engines power initially and then transmit every bit of it to the rear. Auto's can usually get into the 11's without too much problem.