Garthy Posted January 20, 2009 Share Posted January 20, 2009 Hi all, I snapped by front prop while playing at Bala a while back, so bought a GKN Hardy Spicer to replace it. I think (can't remember exactly) I stupidly pulled the two parts apart for some reason just before I installed it. Anyway, now at certain speeds I get a rumbling noise from the front, usually when the wheels are driving the engine. From doing some searching on here, I believe my prop is unbalanced. My questions are: Is this rumbling caused by an unbalanced prop? How do I balance an unbalanced prop? It's a 1992 200 tdi 90 if that helps. Thanks. Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted January 20, 2009 Share Posted January 20, 2009 worn diff bearings can have the same effect. As can a knackered sliding joint. The prop has to be balanced by somebody with the correct machine that will calculate the out of balance moment and at which radial position it occurs. Quote Link to comment Share on other sites More sharing options...
Garthy Posted January 20, 2009 Author Share Posted January 20, 2009 Thanks. Am I right in assuming it would be more likely to be an unbalanced prop, knowing that I've just replaced it and also knowing that it didn't make the noise before the old one snapped. Also will there be any detrimental damage done if I leave it as it doesn't do it all that often. Quote Link to comment Share on other sites More sharing options...
V8 Freak Posted January 20, 2009 Share Posted January 20, 2009 One thing to look at first is if you have the UJ's in line. I was advised by Dave Ashcroft to have the UJ's offset by one or two splines (front UJ leading the rear) on the front prop to minimise vibration. Mine were in line. Popped one end off the axle, moved round two splines and vibration gone.. Worth a few minutes under the truck to find out.... Neil Quote Link to comment Share on other sites More sharing options...
clbarclay Posted January 20, 2009 Share Posted January 20, 2009 Due to the different working angles of the UJs on the front of a coil sprung land rover, the UJs are slightly out of phase as standard as a fudge to minimise vibration. Quote Link to comment Share on other sites More sharing options...
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