Vehicle & Technical > Discovery

How do i check prop UJ for wear? Horrible clunk

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spy:
I have a clunk when I take up drive that I am assuming is probably gearbox mainshaft wear and maybe a UJ as well?  It did improve a tad with grease to the prop shaft UJ's.

Is there a way to check all the joints to see if one has excessive play?  If anyone can explain the process in monkey terms I would be very grateful! :D  There might even be a beer in it for you if your at towcester!! :D:D

Cheers,

Mike

Hightower:
When my prop uj went I could get under and physically move the prop about, i.e. grab it and wiggle it around.
T'was obvious what the problem was.

spy:
Move it side to side you mean?  I assume there should be some free twist if you know what I mean?

Cheers,

Mike

Tyke:
There will be some 'backlash in the diff/box gears so you will be able to turn it it a few degrees. That doesn't mean the uj's are shot.

If it's a uj thats well gone it will be obvious. Get a grip of the shaft and waggle it up and down and side to side. If it's bad you will see it move and feel it knock.

If it's not so bad you could try levering the yokes against each other with a pry bar/big screwdriver. One hand on the offending yokes whil;e levering with the other should detect any movement.

If it is bad you usually get an attack of the 'vibes' when your driving which gets progressively worse. Don't leave it too long, it could do the yoke end of the shaft then its a bit more expensive to sort.

New uj's cost very little and only a bit of time and effort. Needs a big vice, drift and hammer to replace the bearings - can be done without the vice if your carefull with the hammer and drift  :wink:

thermidorthelobster:
In a 200tdi I'd bet it's probably the gearbox main shaft.  I think the only solution is a new gearbox.  But on the bright side, if you get a replacement with the drilled shaft, it hopefully won't happen again.

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