Diff swap

An open diff was never going to cut it on a race track, so a complete Torsen LSD diff assembly from a JZZ30 Soarer was swapped in.
The ratio was consequently changed from a 3.9:1 to 4.1:1 for quicker acceleration
Applicable Toyota axle codes are, from A01A to A02B.
The Soarer now has excellent traction out of tight corners and the inside wheel no longer spins up on acceleration.