I have a 90 that has had a 200tdi fitted at some point.
quite often there is a clunk on lifting the clutch both when setting off from standing and when changing up during driving.
I have had a look and discovered that i can get a fair bit of rotational play by hand on the front propshaft , my question is, how do i know whether the fault lies in the front diff, or the transfer box?
cheers
colin
Start off checking the propshaft UJ's. With the appropriate wheels chocked, jack up a corner with the handbrake off and check for play in the propshaft UJ's - the rear of the front prop is favourite. It important to check UJ's with no load on them - even very knackerd ones will seem ok with the wheels on the ground and the handbrake on. Check all the radius arm bushes and the A frame ball joint. If they are ok, and the free play is more than about ¼ turn, take the PTO cover off the transfer box and rattle the input gear - no rusty muck and/or play means thats probably ok. A bit of a clunk isn't wildly unusal, and you may just have to wait for the offending component to make itself known.
It quite unikely that the diffs are at fault - they are usually very vocal about telling you when they are unhappy.
Richard
Thanks for that, I don't think it is the UJ's when i rotate the propshaft, the UJs at both ends also moves with the shaft.
I am puzzled.
colin
On or around 7 Aug 2006 08:01:46 -0700, "cg" enlightened us thusly:
it can be CV joints in the front axle, if the axle's done a lot of miles. However, if it's a 5-speed LTT77 then my money's on the gearbox output shaft/transfer input gear splines. expensive fix, if so, so carry on driving and be gentle with the clutch.
I think you are looking for the wrong thing. The UJ's will always turn with the propshaft (belive me, if they don't you really would notice ;-) ), the UJ's are X shape things that join the actual shaft to the drive flanges (the bits with the 4 bolts in that go into the gear box one end and the diff the other). The ends of each arm of the X sit in little cups in the yoke (the sort of arm things). You should be looking for sideways movement where the X "legs" go into the cups - i.e with a wheel off the ground try and push-up and pull-down the propshaft - it shouldn't move except for the normal truning movenent.
That's probably worst explanation ever, but I've tried!
Richard
On my old 200Tdi Disco it turned out to be the A frame ball joint, as mentioned above. TonyB
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