SunOrangeZ28

I was out driving and this greyish IS300 with turbo wants to race so we go from a 30mph roll. when I grabed second all i got was this bang noise, bad vibration, some clunks, and at one point it sounded like the driveshaft was rubing the floor. what do you guys think it is , a broken torque arm or what.

trackbird

iTrader: (4)

Check your transmission mount. IF it's ok, look at the driveshaft, U-joints and torque arm. See what is bent or broken.

In my experience breaking transmission mounts, the driveshaft and/or transmission hit the floor under the console. This was a big problem on my 3rd gen (6 mounts). Start there....

Good luck!

SunOrangeZ28

i jacked up the car today and first thing i found is my torque arm has a crack right by the bolts.
how much horsepower can the stock take because all i am running is 12.97 at 111 in the quarter with cutout and lid.

blk~2000~Z28

This sounds like my first experience with my ASR on while slamming second, just minus the vibration and rubbing issue. I would say that it would be your problem but I read that you found a crack so sorry, hope that you get that fixed.

trackbird

iTrader: (4)

I think the torque arm has been affected by fatigue cycles in your case. Ultimate horsepower will reach a level where you bend them, but I suspect yours cracked due to lots of "hammering gears". Not that it's bad to do so, it can be fun, but I suspect that it finally flexed enough to "work harden" (take a paperclip, bend it back and fourth until it heats up, hardens and snaps, same concept) and crack. I'd suggest an Edelbrock (good and inexpensive) or one from LG Motorsports (great stuff).

My thoughts.