brian GT6. Posted April 1, 2017 Report Share Posted April 1, 2017 So at the end of the season in my mk3 rotoflex gt6 I had the wheel bearings changed as I had been having a rumble from the back and vibration at anything over 40 mph. The noise suddenly got a lot worse and there was a lot of play in the rear wheel. Wheel bearings were shot and at the same time I had the rear overhauled with polybushes and CV joint conversion. The good news is that the handling is transformed and the car feels much more together than before. The bad news is that the vibration and noise is still there. It's not a whining but a rumble noise and a pretty serious vibration, worse on the over run. I couldn't feel much play in the propshaft UJs. Is this likely to be the diff or the propshaft UJs. Ive read the canley piece and that infers it's more likley to be the UJs. Help please!!! Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 1, 2017 Report Share Posted April 1, 2017 The trouble with transmission noise and vibro is where does it come from can you get the car up on stands , support the suspension at near running height and get under safely a old wooden handled screwdriver used as a stethoscope can easily home in on the source of the rumble Transmision noises you can start with the clutch damper springs and centre hub the prop , its uj and telescopic slider, diff pinion bearings , diff case bearings output shaft bearings, or worn or loose crownwheel... how long is the string do check exhaust mounts and possible torque tilt making intererence on the tunnel, the diff front crossmember etc. Sorry not much other than a list of maybe, s Link to comment Share on other sites More sharing options...
DerekS Posted April 1, 2017 Report Share Posted April 1, 2017 Hello Brian, a small point, you say that you can't feel much play in the U/Js... there shouldn't be any. This could be the source of your noise. A dry- as in the grease has degraded or gone- joint or a needle roller in the U/J can make a fair amount of noise. Or is there some wear in the propshaft yolks, where the U/J cups fit? I didn't have a great deal of noise but there was something I could hear; replacing the rear one with one from the Club Shop with a grease nipple made a significant difference. It also means that I can give it a shot of high pressure grease annually as a bonus. Also, isn't there a clue where it's worse on the overrun as in the drive isn't taking up the play? You'll get sorted, I'm sure. Best regards, Derek. Link to comment Share on other sites More sharing options...
brian GT6. Posted April 1, 2017 Author Report Share Posted April 1, 2017 Pretty sure it's the propshaft UJs now. Can you take the propshaft out from underneath or do you need to take the gearbox cover off to get at the nuts? Link to comment Share on other sites More sharing options...
Clive Posted April 2, 2017 Report Share Posted April 2, 2017 pretty sure it is tunnel out. There is very little room between the chassis rails, so although you can see the nuts, you can't get a spanner in there AND turn it. New UJ's may solve the issue. Check the sliding joint for play too. If there is, get a new prop. Otherwise it would be worth seeking a local propshaft repairer and getting it balanced at the same time. Alternatively, get a new prop. Yes, more expensive, but it is a direct swap, and should be a fit and forget job with no worries about ongoing issues. Dave Mac is the place.... Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 2, 2017 Report Share Posted April 2, 2017 Yes tunnel out makes it a straightforward job. I always marked the prop so that it went back to the same bolt holes, don't know if that was entirely necessary, but belt and braces! Link to comment Share on other sites More sharing options...
brian GT6. Posted April 25, 2017 Author Report Share Posted April 25, 2017 Quick update. It's the diff that's the problem. So at the end of this it will have had new rear wheel bearings (which were needed and masked the other problems), CV upgrade kit, polybush complete replacement at rear, gaz adjustables at the rear, new propshaft and reconditioned diff. Triumphs, don't you just love them... Link to comment Share on other sites More sharing options...
JohnD Posted April 26, 2017 Report Share Posted April 26, 2017 A car 44 years old, at least, and you complain that it needs some replacements? John Link to comment Share on other sites More sharing options...
Dave C Posted April 26, 2017 Report Share Posted April 26, 2017 Could be worse. If it was, say, a Jaguar you'd probably be crying at the cost by now.... Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 26, 2017 Report Share Posted April 26, 2017 My modern is a Jaguar, the key fob stopped working. Unlike previous models where you opened the boot and drivers door, then flashed the head lights 3 times while flicking the ignition, to reset it, on this one it's a job for the main dealer. £60 for 5 minutes pressing buttons on a lap top. The tyres cost £180 each! I bought all 5 GT6 tyres for £120. Crying? Yes! 1 Link to comment Share on other sites More sharing options...
mishmosh Posted April 26, 2017 Report Share Posted April 26, 2017 Doug... I have just bought an XF ........ oh.........oh.........oh........... Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 26, 2017 Report Share Posted April 26, 2017 On the other hand it is very comfortable, an armchair on wheels, and goes like a rocket Also I have found an independent Jaguar servicing garage, not quite as expensive as the main dealer so not quite so painful. Mine is an S type but an XF might be next on my list, or an XK. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 27, 2017 Report Share Posted April 27, 2017 at the risk of being hung if you want something nippy smart but has the MG badge here is a place with loads of them all sorted and some smart and very cheap for a modern two seater roadster http://www.trophycars.co.uk/ now thats thread drift !!! Pete ...........wheres the soap mouthwash Ha Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 27, 2017 Report Share Posted April 27, 2017 Get thee behind me Satan! Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 27, 2017 Report Share Posted April 27, 2017 if youre in your Jag S and Im in my 2000 It will always be ............................ ITS behind you Pete Link to comment Share on other sites More sharing options...
mishmosh Posted April 29, 2017 Report Share Posted April 29, 2017 i fancied an XK8 but we were replacing the family C4 picasso , so a Sportbrake, it is.Quick and comfy ! Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 29, 2017 Report Share Posted April 29, 2017 Ooooo! A Sportbrake, I didn't know there was such a thing. I want one. The S type is not so good on trips to the dump. For a big car there's not a lot of room inside. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 30, 2017 Report Share Posted April 30, 2017 Its not cool to call them estate cars , weve had sport tourers, and woodies over the years who dreams these bling titles up were all off to crews hill to ponder some pansies today I may use my MPV Or is it a ,,,!!!!!! Wotsit Link to comment Share on other sites More sharing options...
JohnD Posted April 30, 2017 Report Share Posted April 30, 2017 BMW, and Citroen call them "Tourer". John Link to comment Share on other sites More sharing options...
mishmosh Posted May 2, 2017 Report Share Posted May 2, 2017 its not a huge boot, but its a lovely car! Not a patch on my old XJ6 (XJ40) though, but 50 MPG and 200 bhp. Easier to load kayaks on the roof than the old C4 Picasso.though more care required.... Herald is the keeper though. Link to comment Share on other sites More sharing options...
brian GT6. Posted May 4, 2017 Author Report Share Posted May 4, 2017 Back on topic, Trevor the Triumph comes back from the garage, as I didn't have time to do it myself, on Saturday Morning just in time for the start of summer It's all new running gear from the rear wheel until we hit the overdrive unit now. Maybe the engine and gearbox will get attention next year. Link to comment Share on other sites More sharing options...
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