Thread: rubber donut advice

Originally Posted by pistolpete

another donut gone...

If that is the new one you just had installed, then someone is putting them in wrong or using crap products.

it was the one I just had installed... I'm getting rid of the rotoflex propshaft and putting in the unijoint RRC one.. then I'll never have a problem again..

the donuts where britpart.. so they cant be that bad can they..

I have a 2" lift on my D1 3.9 V8. Replaced the donut about 10,000kms ago. No problems with it. I used a GKN one for the replacement.
At the same time I also replaced trailing arm bushes, A arm centre pivot bearing, and centre bush (in the donut). The centre bush was a PITA to replace as the old one was very hard to get out.

I was told 2"+ lift will shag them and if any of the rear bushings are worn out it will also wear them out fairly quickly as well.

Originally Posted by warren9981

I have a 2" lift on my D1 3.9 V8. Replaced the donut about 10,000kms ago. No problems with it. I used a GKN one for the replacement.
At the same time I also replaced trailing arm bushes, A arm centre pivot bearing, and centre bush (in the donut). The centre bush was a PITA to replace as the old one was very hard to get out.

How much offroad stuff have you done? Mine have been fine until I get sandy or muddy.

I did the centre bush also.

Originally Posted by pistolpete

it was the one I just had installed... I'm getting rid of the rotoflex propshaft and putting in the unijoint RRC one.. then I'll never have a problem again..

the donuts where britpart.. so they cant be that bad can they..

from the manual:

47 PROPELLER SHAFTS
4 REPAIR
REAR PROPELLER SHAFT
Service repair no - 47.15.03
NOTE: SGF rubber coupling should be left
attached to propeller shaft. Only remove
coupling from propeller shaft if
replacement is required.
Remove
1. Scribe alignment marks on flanges at both ends
of propeller shaft to ensure correct refitting.
2. Remove three nuts and bolts securing flexible
coupling to axle flange.
3. Remove nuts securing propeller shaft flange to
transfer gearbox.
4. Raise propeller shaft at gearbox end detach
coupling from spigot at differential and withdraw
shaft.
NOTE: For replacement of spigot (pinion
flange centralising peg). See REAR AXLE
AND FINAL DRIVE, Overhaul, Axle
Differential Assembly
Overhaul
Service repair no - 47.15.12
NOTE: Refer to front propeller shaft
overhaul procedure for gearbox end of
shaft. The SGF rubber coupling is a
non-serviceable item.
Refit
5. Locate flexible coupling over spigot, align
scribed marks and secure at transfer gearbox.
Tighten to 47 Nm.
6. Secure flexible coupling to axle flange with three
nuts and bolts and Tighten to 78 Nm.
FLEXIBLE COUPLING
NOTE: Flexible coupling should only be
removed if a new coupling is to be fitted.
Remove
1. Remove rear propeller shaft. See Rear
Propeller Shaft.
2. Remove nuts and bolts securing flexible
coupling to propeller shaft.
Refit
3. Reverse removal procedure. Fit nuts and bolts.
Tighten to 78 Nm.

I can only imagine that you didn't install it correctly (that would be hard to stuff up) or you didn't do it up tight enough

... as harry wrote earlier - "many critics on here deride the coupling, but if you don't drive sideways on logs, it is a good thing, i actually think i should never have changed the other car to a rear uni"

can you go much tighter than a rattle gun?

Originally Posted by pistolpete

can you go much tighter than a rattle gun?

My understanding is yes, I was told that after tightening wheel nuts with the rattle gun you should give a final tighten with the breaker bar and socket.