Under extreme conditions, the standard front diff tries to climb out of full engagement under full power, leading to stripped teeth. Ashcroft has cut the gears in reverse for the front in order to keep the gears fully engaged, a significant improvement over the original design. Ashcroft have also upgraded the material specification compared to the genuine Land Rover parts.

All pinions accept the later 24 spline drive flanges and have the female thread to accept the later type bolt (FS112301P) and washer (FTC5413). All ring gear threads are the stock 3/8 UNF, we stock the late flange head high tensile bolts for these (FTC5150). Ashcroft have chosen to coat the crown wheel and pinions in chemical black to aid corrosion resistance and offer a unique appearance.

Heavy-duty 4.12 ratio using a tooth count of 33 on the crown wheel and 8 teeth on the pinion.

Rear long pinion

Defender - up to 7A - except 110 / 130

Discovery 1

Range Rover Classic