Wanted: Lexus Is200 Standard Diff With Case (whole Unit)

[Rrs200]

Some of you might know that I was doing a manual converion on my car and I have fitten TRD 2 way LSD with 4.778 final gear. I have pick up the car on Monday and had a test drive (drifting) in silverstone on the Monday just gone and found out the car has less power than before. My engineer has figure out could be the TC and the ABS which effect the speed and drifting so we took it off. Well, it does result better as the TC hold the power (due to wiring problrm) but it still less power than usual.

So we think it could be the final gear as each ratio is now toooo close, therefore need to borrow or buy (if cheap) a rear IS200 standard diff with standard final gear for testing the car.

Anyone might think of any idea of the cause, also the car still has not delimited and I think it could be one of the reason cos everytime wen the power come and its already hit the red line.

Does anyone know whats the max rpm (red line) of the standard manual altezza?

Also whats the best idea to extend the red limit?