SR1 reversing differential

GraemeD · 2018-12-01T22:12:38Z

So, I have had a rubbing noise that happened intermittently on deceleration. It would instantly go away if I touched the clutch or the throttle. Looked at all the brakes and drive shafts sprocket and the diff. Regressed the diff with no effect. Nothing obviously stood out. Now that I'm doing my winter maintenance, I could hear a light rubbing noise when turning the left side with the hub and the right axle was removed. A little more investigation revealed the reverse hub had some run out. So out came the diff. Measuring the runout at about .040". This is with the reverse hub fully seated in the forward position. So further apart it came.First remove the 5 bolts, they are very tight with red loctite, so an impact gun is required.with the outer cover off you can see the torque sensing part if the Quaife QBA7R diff.Then lift out the reverse planetary gear assemblydown inside where the engagement dogs go, was a small piece of a metal dowel, (I removed it before the photo, it's the piece in the following photo)This piece was preventing the reverse hub from fully engaging the drive dogs.It came from one of the axles for the planitary gears, so I fished out the rest of the axle. It was broken in three pieces.So I checked the rest of them and found two more broken, but they had not fallen out. The pins are held in with a large singe snap ring on the inside lip. here is a photo of all the parts. The socket head screws are just place holders for the broken axles. They would be flush like the other 5 remaining ones.now if I can get replacement parts, this will be simple. Also good to note, that the reverse cavity is separate from the diff cavity. So just greasing the outer fittings will have no effect on the ATB section. You will have to remove the bearings and use the grease fittings on the ends.