Lars L Posted April 10, 2007 Share Posted April 10, 2007 I have posted this on the Disco forum, 29 have looked, no reply. Maybe better attention here? A mate has a 300 Tdi manual Disco with serious vibration issues. A while ago, the transferbox gave up and he installed a second hand one. At first everything was fine, but suddenly this vibration developed. The Disco is raised 2" and he has installed a caster correction set. When it is parked on level ground, the rear u-joint on the front propshaft is almost at its limit, while the front on is almost straight. The rear yoke is more or less touching the drive member half of the joint. I also noticed that it seems like the gearboxes sit low at the rear end, when looking from the side they are not parallell with the chassis. I have no Tdi to compare with, but on my V8, the box is level to the chassis. Can someone with a manual 300 Tdi just check how one should look? Then there also was some play in the front drive member, so a bearing change is on the to-do-list. Quote Link to comment Share on other sites More sharing options...
jules Posted April 10, 2007 Share Posted April 10, 2007 I have posted this on the Disco forum, 29 have looked, no reply. Maybe better attention here?A mate has a 300 Tdi manual Disco with serious vibration issues. A while ago, the transferbox gave up and he installed a second hand one. At first everything was fine, but suddenly this vibration developed. The Disco is raised 2" and he has installed a caster correction set. When it is parked on level ground, the rear u-joint on the front propshaft is almost at its limit, while the front on is almost straight. The rear yoke is more or less touching the drive member half of the joint. I also noticed that it seems like the gearboxes sit low at the rear end, when looking from the side they are not parallell with the chassis. I have no Tdi to compare with, but on my V8, the box is level to the chassis. Can someone with a manual 300 Tdi just check how one should look? Then there also was some play in the front drive member, so a bearing change is on the to-do-list. In my experience the props are the first thing to look at for vibration. Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted April 10, 2007 Share Posted April 10, 2007 I would suggest fitting a double cardon propshaft from a TD5, although it might be easier to get one from someone like Devon 4x4 as they are made to be fully greasable and have the correct flanges fitted so you don't need to change the one on the transfer box. HTH Pete. Quote Link to comment Share on other sites More sharing options...
Lars L Posted April 10, 2007 Author Share Posted April 10, 2007 To follow up - we have tried another prop, the one from my donor Disco. Does really raising only 2" cause the prop to "bend" this much? He has driven for years before without problems. Has anybody a chance to just crawl under their Disco to see if the box is parallell to the chassis? Sorry, not too much of them around here, otherwise I could check myself... Quote Link to comment Share on other sites More sharing options...
white90 Posted April 10, 2007 Share Posted April 10, 2007 I would suggest fitting a double cardon propshaft from a TD5, although it might be easier to get one from someone like Devon 4x4 as they are made to be fully greasable and have the correct flanges fitted so you don't need to change the one on the transfer box.HTH Pete. D44 were just selling standard D2 props last time I looked. fully greasable etc come from the Propshaft Clinic in Bradford Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted April 10, 2007 Share Posted April 10, 2007 I bought one last week and it definately is fully greaseable has 4 grease nipples, 3 for the U/Js and one for the slider. I think Liz said they now have them made like this. Pete. Quote Link to comment Share on other sites More sharing options...
Kev Baldwin Posted April 10, 2007 Share Posted April 10, 2007 Driveline vibrations on a Disco with a lift is almost certain to be from the front prop. Common complaint. I swapped the front prop on mine for a Double Cardan D2 front prop. Result: Vibrations gone instantly. Quote Link to comment Share on other sites More sharing options...
white90 Posted April 10, 2007 Share Posted April 10, 2007 I bought one last week and it definately is fully greaseable has 4 grease nipples, 3 for the U/Js and one for the slider. I think Liz said they now have them made like this.Pete. A new product then. what they really need is a greaseable ball/socket joint this is standard on the PSC version Quote Link to comment Share on other sites More sharing options...
SteveG Posted April 10, 2007 Share Posted April 10, 2007 Tony, this changed after all the posts on D44 forum, yours being one of them, relating to Guy90 buying one and then everyone pointing out that they fail after a set amount of time. IIRC they swapped out Guy's for a greaseable one and now only sell these. Cheers Steve Quote Link to comment Share on other sites More sharing options...
white90 Posted April 10, 2007 Share Posted April 10, 2007 Well that's a change for a company to listen. D44 are at least among the decent ones out there: Ashcrofts/X-Eng/Mud UK/Maxi Drive/Gigglepin being the others I'd recommend to anyone Quote Link to comment Share on other sites More sharing options...
steve b Posted April 10, 2007 Share Posted April 10, 2007 Hi Lars, is the castor correction a more recent mod since the lift ? Lots of people here don,t bother with cc for 2" lift which puts the diff end of the prop at more of an angle......if both joints run at an angle this can reduce vibes , also pretty sure the early RRC prop with the open style joint will give more angle of operation and is the same length i think . Finally positive id of fault = take prop off lock ctr diff & try it then . final thought any broken/worn eng/gearbox mounts? hope this helps Steveb Quote Link to comment Share on other sites More sharing options...
Lars L Posted April 10, 2007 Author Share Posted April 10, 2007 I talked to the guy over the phone just now. He fitted the caster correction bushings because the steering was vague after the lift. Since then he has driven his Disco for some 100.000 kms without any problems with vibrations. Then suddenly they appear and the rear u-joint is almost fully angled. And yes, when he takes the prop off there are no vibes any more. As said before, the rear rubber mountings at the transfer box may be knackered as the boxes seem to tilt down at the rear. Anyway, I have suggested that he checks all the bushings for the front axle, they could possibly be worn and cause the axle to tilt too much. Quote Link to comment Share on other sites More sharing options...
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