Join Date: Dec 2010
Location: Ft Wayne, IN
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Motor Mount bushings should be on the priority list. Straight Solid mounts I would stay away from. Especially with the way clutches are designed for the tC with the springs in the disc. Solid mounts will transfer vibration back into the engine and it's components. All that jarring causes failures within the drivetrain. Bushings still provide stiffness but are not going to be super harsh like solid mounts will.
Have not seen much if any balance shaft failures in stock motor tC's making 300+whp, so I wouldn't say they were weak. Our trans is solid, it's 4th gear that acts up in "race" conditions at 400+whp. Can you do some dyno pulls at 600, 700+whp...sure. Can you daily it with a bunch of power...sure. But in a race environment, it's 4th that's going to go on you.
Axles will break with poor driving. With proper driving, there are guys running low 12's and even into the 11's with stock axles. I'm on stock axles myself and doing road course/HPDE days with a GT3076R @ 11lbs of boost.