A-frame bush

The "top hat" bushes where A-frame pivots under the differential have a very short life, especially when soaked in oil from a leaking axle. The Moss part number is 88G274 (old number Y16), and this is identical to the front top trunnion bush on a MG Midget.

Dimensions:
Length: 17mm
Wide end diameter: 29mm
Narrow end diameter: 23mm
Centre hole diameter: 12mm

2 are required

The bushes need compressing a fair bit to fit within the bracket on the diff case. The way i have found easiest for me is to put the new bushes in the A frame and put the bolt through and do up the nut to squash the bushes flat. With the bolt done swing the A frame up into the braket on the diff. You will be only be able to get it so far as the bolt and nut will stop it naturally but far enough so the bracket on the diff is located on the lugs of the bushes. Keeping the frame up in position undo the bolt and nut and use a jack to gently ease the A-frame up. The next tricky bit is getting everything lined up sufficiently well for the bolt to go all the way through - you'll need a tapered drift for that, or endless supplies of patience. A smear of brake grease or washing up soap over the bushes eases things considerably.
Do not finally tighten the bolt until the car is on the ground and at normal ride height. This will ensure the rubber bushes are not pre-loaded but are locked in a neutral position.