Tim D. Posted April 28, 2019 Report Share Posted April 28, 2019 Hi All, Just changed one of the UJs on the halfshafts at the rear. Not a job I relish as I inevitably drop on of the needle bearings of get something jammed.. Anyhow two interesting things.. Was changing them as I had a sligh whine from the rear. When I took the halfshaft off it was clear that the issue was the outer UJ which seemed to be binding slightly. When disassembled the bearing surface on the spider seemed to have markings that match the needles which you could feel with a finger nail hence causing the binding. Anyone know why these marks would have occurred? Second observation was using the correct tools made it all easy (60 mins to disassemble, replace UJ and reassemble.) When I say correct tools I mean a UJ press (Universal 10PCS Ball Joint Repair Removal Tool Kit, Auto Truck Press Service Tool Set 2/4 Wheel Drive Vehicle Remover Installer Adapters https://www.amazon.co.uk/dp/B074V6BLGW/ref=cm_sw_r_cp_tai_1uDXCbKCBCWKK). made the whole thing a doddle! Cheers Tim Quote Link to post Share on other sites
Waldi Posted April 28, 2019 Report Share Posted April 28, 2019 Hi Tim, good you could fix it, it is always rewarding to diy. The indents from the needles in the crucifix are not ok, but common on worn UJ’s. The needles are harder than the crucifix journal surface. Was the old damaged UJ properly lubricated? Waldi Quote Link to post Share on other sites
Rogcastle Posted April 28, 2019 Report Share Posted April 28, 2019 Hi Tim I have just changed all four UJ's using a vice which did the job, but was hard work. I had one joint like that and it usually means it's either worn out, lack of greasing or dirt in the joint. That tool looks the business and a good price as well. Roger Quote Link to post Share on other sites
Tim D. Posted April 28, 2019 Author Report Share Posted April 28, 2019 Seemed to be plenty of grease in the joint. Quote Link to post Share on other sites
cubehopper Posted April 28, 2019 Report Share Posted April 28, 2019 Hi Tim How loud was the whining and did changing the UJs eliminate the noise. cheers Dave . Quote Link to post Share on other sites
Tim D. Posted April 28, 2019 Author Report Share Posted April 28, 2019 Not that loud. But have had the DIF checked and it was fine alongside the wheel bearings but the outer uj was clearly knackered. Not checked the whine has gone yet however so fingers crossed. Tim Quote Link to post Share on other sites
cubehopper Posted April 28, 2019 Report Share Posted April 28, 2019 You`ve probably read about my ongoing rear end whine, I`m even suspecting my recently installed recon diff now because everything else feels ok. My UJs feel fine and are well greased but you say yours was and it was still worn. I think I may pull the driveshafts out and have a closer look at mine, you never know. cheers Dave Quote Link to post Share on other sites
Tim D. Posted April 29, 2019 Author Report Share Posted April 29, 2019 What was interesting was that in the bearing that had failed the plastic insert at the bottom of the cup was torn up. No idea whether this was during assembly or the result of the bearing wearing. Cheers Tim Quote Link to post Share on other sites
Waldi Posted April 29, 2019 Report Share Posted April 29, 2019 Tim, Ive never seen a plastic insert at the bottom of the cups, strange. Waldi Quote Link to post Share on other sites
Tim D. Posted April 29, 2019 Author Report Share Posted April 29, 2019 The GKN replacement has the same. It's a flat disc with a cone in the centre that fits into the grease hole in the end of the spider. It doesn't seem to stop the grease from flowing into the bearing but I could imaging that it stops it from flowing back. It could also help distribution of grease in the bearing Tim Quote Link to post Share on other sites
TriumphV8 Posted April 29, 2019 Report Share Posted April 29, 2019 (edited) Marks on the inner part of UJ are pretty normal with high torque that was applied to the axle. This makes it more common on the driveshaft than on the propshaft. Either you have a high performance engine or tend to accelerate hard in low gears. The reason is that the needles loose their rectangular position under heavy load and so at the tips of the inner part a point load is created instead of a line load when needles are in correct position. Had a discussion with a specialist at a fair. He told me they made special caged joints what dropped the amount of needles in the joint but due to fixed angle of needles over all gave better results. The solution is the CV-jointed axle. I tried the UJs with the longer needles but lost some of them. Revington offered new propshafts with these UJs but there the oute cups broke two times and I stepped back to GKNs TVC joint with smaller inner part, not the heavy duty one. The marks on the inner parts have nothing to do with lubrication. Edited April 29, 2019 by TriumphV8 Quote Link to post Share on other sites
Z320 Posted April 29, 2019 Report Share Posted April 29, 2019 Isn't the dif a "torque and speed exchanger"? The probshaft runs 3.7 times faster with 3.7 times less torque than the driveshafts? The driveshafts run 3.7 times slower with 3.7 times more torque than the propshaft? Quote Link to post Share on other sites
TriumphV8 Posted April 29, 2019 Report Share Posted April 29, 2019 That is correct, normally the marks should only occur on the driveshafts. That was the reason for me to step back to the original design with shorter needles. If really needed on the propshaft I would have made another attempt with the heavy duty joint with the longer needles. Quote Link to post Share on other sites
TriumphV8 Posted April 29, 2019 Report Share Posted April 29, 2019 Despite this opinion I am on the smaller type because I lost two of the HG loints by braking of the cups. https://www.landroverexpedition.com/articles/universal-joint-differences/ Quote Link to post Share on other sites
Waldi Posted April 29, 2019 Report Share Posted April 29, 2019 8 hours ago, Tim D. said: The GKN replacement has the same. It's a flat disc with a cone in the centre that fits into the grease hole in the end of the spider. It doesn't seem to stop the grease from flowing into the bearing but I could imaging that it stops it from flowing back. It could also help distribution of grease in the bearing Tim Thanks, I learnt something today:) Waldi Quote Link to post Share on other sites
Tim D. Posted April 29, 2019 Author Report Share Posted April 29, 2019 Interesting what you say about the effect of extra torque. The car has a supercharger so perhaps that is the culprit. Interestingly I suspect wouldn't have heard the whine if it where not for having the hardtop on. Tim Quote Link to post Share on other sites
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