Green_Giant

Guy's,

After a couple of years doing the odd track day I have decided to enter a race series and have recently purchased a race prepared WRX classic, The car is a work in progress but the current spec matches my limited driving ability and hopefully the car can develop along with my racing skills.

During a recent track day I found I was never using 5th gear, even along the straight and I'm sure this isn't a very efficient situation. The car is currently running with a standard turbo diff and I presume a shorter ratio WRX diff would suit better.

My question, can I just replace the rear diff to a WRX spec one, or do I need to also change the front diff to match?

Thanks

172sport

iTrader: (6)

Diffs need to match, i find my std 95wrx ratios quite good on track, where as my mate never uses 5th in his P1

put your ratios in here

Gearboxman - ratio calculator tool

GearHack: Subaru Transmission Chart