One of the absolutely best modifications anyone can do to any car is a differential. In terms of handling it is one of the most dramatic mods you can do that gives you that amazing driver feedback during track conditions. With the FWD application it helps to significantly reduce if not eliminate a great deal of understeer. For our Scion TC Time Attack car we had to go with one of the best in the business, OS Giken.
Contrary to Rear Wheel Drive applications or AWD where you can just remove the "Pumpkin"(Differential Housing) you need to actually remove the transmission and disassemble it to change out a diff. Its a little bit more daunting of a task, but it is absolutely well worth the effort.
While we were there, we took out the stock Clutch and changed it out with an ACT Head Duty Clutch. We needed that extra strong bite that ACT clutches gives especially since we went with forced induction.
Organization is key in this kind of work and our head Technician Sy, is a master of organization with his super JDM work ethic.
The network of transmission gears that enables our driver to hit those apex's.
Steven Tran @ Gruppe-S