pist0nbr0ke Posted February 26, 2009 Share Posted February 26, 2009 Hi there.... again! I have noticed a knocking when changing gear, so i duly dived underneath to look at the transmission. I noticed that whilst the rear prop cannot be turned (with all wheels on the ground) the front can be twisted an amount. My suspicions are the the diff is on the way out, or is it? Before idive in with another diff is it more likely to be half shalfs? What action is best? Cheers Neil Quote Link to comment Share on other sites More sharing options...
white90 Posted February 26, 2009 Share Posted February 26, 2009 That us as it sould be. most likeley to be prop uj's best tested with the prop off halfshaft noise, check the drive members are not to sloppy I do not think it is the diff in the transfer box. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted February 26, 2009 Share Posted February 26, 2009 Did you have the handbrake on? There should be a bit of free play on both props (8th of a turn maybe). Could be any number of things - drive flanges; shafts, diffs, gearbox mainshaft splines. Quote Link to comment Share on other sites More sharing options...
pist0nbr0ke Posted February 26, 2009 Author Share Posted February 26, 2009 gents, Some more info!! I had all four wheels on the deck with the hand brake on, and i must of had just over a quarter of a turn on the front prop. The ujs look good and the extra play is certainly coming from inside the diff. What is likely to wear first, the diff or the half shafts? Cheers Neil Quote Link to comment Share on other sites More sharing options...
white90 Posted February 26, 2009 Share Posted February 26, 2009 Shafts, Take the props off and see how much play is in each diff and the outputs of the transfer box. what you describe is much like mine and I have rebuilt of new stuff throughout but no clunk. UJs/A frame ball joint would also be worth looking at. Quote Link to comment Share on other sites More sharing options...
ciderman Posted February 26, 2009 Share Posted February 26, 2009 What he said ^^^^^ ,The rear A frame Ball joint can be a decieving little bugger when it comes to transmission clunks , They just sit there looking all normal whilst the owner is franticly stripping axles , diffs and transfer boxes , and they are more often than not the little culprit of your woes Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted February 26, 2009 Share Posted February 26, 2009 I had all four wheels on the deck with the hand brake on Try again with the handbrake off. You're not going to get any movement out of the rear prop with it clamped solid by the handbrake. Quote Link to comment Share on other sites More sharing options...
Andrew Chua Posted February 28, 2009 Share Posted February 28, 2009 the a-frame ball joint give a "thock" sound when moving off (lower sounding note). if it's a "cruck" it's more likely the play in the differential. Some play in the prop is perfectly fine. to get a feel of what the "cruck" sounds like, grabe the prop and turn it hard. you'll hear the gears hit each other. that's the sound. Quote Link to comment Share on other sites More sharing options...
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