We are now able to offer a DIY kit for pegging as method of strengthening the Rover differential.

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 Ashcroft locker, ATB or other, although 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.

Please note as per the fitting instructions below to fit this kit you will have to turn down the outside diameter of the diff centre to 162 mm. if you are buying this kit in conjunction with a new locker or ATB diff we can do this for you for £10. If you would like this done just add ‘please turn for pegging’ in the comments field when ordering the locker.

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