If you are heavily off roading your Rover one of the first mods you will need is to change the diff centre for a stronger one be it either Detroit locker, ARB or other, once you have the diff centre up rated you may still experience a failure of the crown wheel and pinion gears.

The reason for the ring and pinion failing is because when the diff is shock loaded, the pinion will push the crown wheel away as the diff centre flexes, once the pinion teeth start to ride up the crown wheel teeth this can allow the pinion to spin and take some teeth off either gear.

We "Peg" the diff to hold the gears in constant mesh by putting a thrust pad behind the crown wheel, opposite the pinion, this means the pinion cannot push the crown wheel away.

This is done by welding a plate on the outside of the diff and drilling and tapping two M16 holes through the plate and through the diff housing. We then fit 2 dog point screws in these holes and two Nyloc nuts on the outside. We fit a phosphor bronze thrust pad inside the diff, which locates on the screws then fit the diff centre back in. Once the diff centre has the backlash and preload set we then adjust the thrust pad in so it lightly touches, then back the screws out a quarter of a turn.

Due to the nature of the work involved we are only able to do this mod "in house" and are not able to supply a kit but we can of course supply rebuilt diffs to your spec, ie 3.54 or 4.11, ARB, pegged.

It is a good idea to adjust the thrust pad to allow for wear every 6 months or so.

The cost of £ 200 is for the Pegging but we would also suggest fitting a new set of bearings and oil seal at an additional £ 40.

This mod is extremely effective, I very rarly see them fail.