Notchy Diff

[adyb]

Hi,

I have just been rebuilding both diffs with replacing RW pulley's, thrust race, diff balls and plates.
The front diff is fine but the rear diff feels notchy almost to a point wear if you turn it slowly you feel it locking in?

I have stripped it down 4 -5 times and can not find the problem, re-greased the plates and turned them round, flushed out all the ballrace and lightly re-oiled and still no joy.

Has anybody else had this problem and found out what was causing it?

The diffs are the new type on the mission.

Cheers

Adrian

[jason]

Check that you have put the circlip in the right way round ie radiused edge towards the thrust race if its in the wrong way it will start to pull out as you tighten up the diff and mess up the action.

Jason

[MattW]

Which Thrust race does it have in it, i.e cage?? colour?? no of balls??

[Remo]

I was told I had the early diff as the thrust bearings were in a race... I had exactly same problem and it was becasue the race was broken and jamming the thrust bearings

[adyb]

The thrust race cage is silver with 6 balls (U1954V Pro thrust bearing) used the black grease that came with it to.
I have tried only 4 balls in the diff to see if I had a duff ball and then it locks in every quater turn, again I swoped the ball's for another 4 and turn the plates around and still the same ???
Find it a pig to get the c-clip out with out bending it and have no more replacments.

Thanks

Adrian

[MattW]

Well you've got the latest thrust race, so that should be ok.

Did it lock up more or less when you started taking balls out of the diff?? Sounds like the plates, but you've turned them round...........

[adyb]

With the diff built, as you turn it sounds rough and every 1/8th of a turn it feels pitted like there is a dent in the plate. If it is turned slowly it can lock into this 'dent'........................................ . ???

[MattW]

If it geels like there is a pit in the plate, then that is usually what it it. Usually the thrust race is more suseptable to this as the bals are smaller, so it is more of a problem for them to drop into a small hole.

I find that as a "general" guide, if it's just rough it's the main balls/plates, but if there feels like a specific hole then it's the thrust race.

Is it actually a new thrust race that you have in it??

[dhamblin]

Adrian on inspection of my original type of Diff the thrust races do have pits in them and the diff does feel slightly notchy.

Seems to be a lot smoother after the car has run for a heat so I leave it... ;)