The 3.7 is a good final drive ratio for tracks with a lot of high speed straightaways. These are semi-helical for maximum strength and superbly manufactured by Quaife, one of the UK's leading transmission manufacturers. It is available to fit standard or LSD-type differentials.
- For Tran X, and Salsbury Differentials with Ring Type Crownwheels please select LSD.
- For use with ATB and Cross Pin Differential please select STD