jad Posted April 12, 2019 Author Share Posted April 12, 2019 Snagger I could almost kiss you! 😘 Removing the front prop has gotten rid of the vibration noise between coast and overrun and also another shuffling noise when coming to a rest! Looks like I need to buy a double cardan propshaft! Still could do with fixing the reason for dodgy bush alignment though... Thank you! Jad Quote Link to comment Share on other sites More sharing options...
jad Posted April 12, 2019 Author Share Posted April 12, 2019 Is it worth trying to change the phasing of the propshaft joints? before buying an expensive propshaft... Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 12, 2019 Share Posted April 12, 2019 Yes, definitely... Can make a huge difference. To what though, I don't know! I am sure a Google search will come up with some theory or other. Quote Link to comment Share on other sites More sharing options...
jad Posted April 12, 2019 Author Share Posted April 12, 2019 I was looking at the attached. I am unsure what phasing my propshaft currently has. Quote Link to comment Share on other sites More sharing options...
jad Posted April 12, 2019 Author Share Posted April 12, 2019 Update. phasing the propshaft 45 degrees has significantly improved the noise making it much quieter and less harsh... What are people's thoughts to trying phasing it 90 degrees? From the info I can't tell if that might improve things further or not... Guessing it couldn't hurt to try.. Cheers Jad Quote Link to comment Share on other sites More sharing options...
lo-fi Posted April 12, 2019 Share Posted April 12, 2019 Good info here: https://therangerstation.com/tech_library/pinionangles.shtml Quote Link to comment Share on other sites More sharing options...
jad Posted April 13, 2019 Author Share Posted April 13, 2019 Well 90 is worse than 45 but not as bad as in phase. Think I'll just go back to 45 in the knowledge that really I should have a double cardan... 🙄 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 13, 2019 Share Posted April 13, 2019 22.5? Quote Link to comment Share on other sites More sharing options...
jad Posted April 13, 2019 Author Share Posted April 13, 2019 22.5 is similar to 45 degrees. Using an inclinometer on my phone I reckon there is about 14 degrees between pinions. Quote Link to comment Share on other sites More sharing options...
lo-fi Posted April 13, 2019 Share Posted April 13, 2019 Why not cut the spring seats off and weld them back on in the correct orientation? Quote Link to comment Share on other sites More sharing options...
jad Posted April 13, 2019 Author Share Posted April 13, 2019 Because that's a lot of work and also impossible without lowering the vehicle quite a bit or the steering bar getting in the way of the leaf springs 😕 Quote Link to comment Share on other sites More sharing options...
Gazzar Posted April 13, 2019 Share Posted April 13, 2019 That's the compromise with the disco conversion, I think. But to build a series axle to disco spec could cost upwards from £500, it's not a bad choice. Quote Link to comment Share on other sites More sharing options...
jad Posted April 13, 2019 Author Share Posted April 13, 2019 Yeah. Think I'll put it to 45 degrees and see how it goes. Might get a new prop if it gets on my nerves... Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 16, 2019 Share Posted April 16, 2019 Sorry, Jad, I was away working. My front diff is also tipped up to get the correct swivel orientation and track rod clearance. The rod is about 1/2" above the tops of the springs with the chassis jacked up so the axle is pulling the springs down most I get front prop vibration at speed, even though I phased the UJs. I would like to have a double-cardan joint on the front end, ultimately, as the prop sits relatively horizontal, deflecting the front UJ quite a bit while the rear UJ is fairly straight. I had 12J/19J/Def200Tdi mounts on the engine, with the low slung right bracket that swoops under the fuel pump on the earlier Defender diesels. This was too close to the front prop, and under the axle and spring twist of braking, the diff was pitching up and causing the UJ to hit that engine bracket. I replaced it with something that arched much higher (I have the space under the fuel pump as I have a Discovery engine) and the problem was resolved. You''ll see the marks on the underside of the engine bracket if you have the same issue. Quote Link to comment Share on other sites More sharing options...
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