ewizzy Posted March 20, 2005 Share Posted March 20, 2005 Right, Ive got a vibration from the rear of the car........ Its seriously P**sing me off now! Starting to seriously stop me enjoying the experience of Supra ownership I'll start with a bit of background: Picked the car up and the clutch (which I already knew was shot) so I tickled it back from Reading to Rochdale drove fine, no problems apart from the clutch slipping when in 5th and 6th and putting my foot down...... Had the clutch replaced at a garage (apparently Japanesecar specialists - Hyper Sports and Racing). Standard toyota Clutch. Bearing in mind I was bedding the clutch in, I didnt do any drag starts or anything stupid, Just on to the slip road I gave it a bit of stick in 3rd and 4th, still tickling the clutch changes though. On the slip road, I think I remember a small bang, nothing too amazing, and If I remember the correct sequence of events, I then felt a vibration.....I could actually be making this up though, and I felt the vibration as I went over 70mph......It was a month or so ago when it happened. I initially thought it was wheel balancing, as this was on the standard 16" jap alloys, and as I had a set of 18" nice new wheels going on when I got home, I didnt worry too much about it. when I got home, I changed the wheels, and then went for a drive........still happened Now, over about 55mph, I can feel the vibration, doesnt matter what gear I am in, it seems totally speed related, specially seeing as it even happens when its out of gear, so that should rule out flywheel and engine balancing etc. I would say that when in gear, the vibration does seem worse when I take my foot off the gas. My thinking now is that its prop shaft related, or diff related..... Has anyone got ANY ideas at all? PLEASE help :( Kind regards Alex Quote Link to comment Share on other sites More sharing options...
imi Posted March 20, 2005 Share Posted March 20, 2005 Not an expert Alex, could it be the cars geometry....get the alignment checked.? Quote Link to comment Share on other sites More sharing options...
Guest slow dog Posted March 20, 2005 Share Posted March 20, 2005 have a look at the rubber doughnut that holds your prop in placeand check its not tired or split Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 By doughnut, do you mean the rubber that the propshaft is bolted to, and then the rubber bolts to the Diff? or is there another bit of rubber "doughnut" I should be looking at? Quote Link to comment Share on other sites More sharing options...
b_have Posted March 20, 2005 Share Posted March 20, 2005 Maybe the initial 'bang' you heard was a prop bolt dropping out. Easy to check. Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 Not an expert Alex, could it be the cars geometry....get the alignment checked.? I will have the alignment checked too.... Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 Maybe the initial 'bang' you heard was a prop bolt dropping out. Easy to check. I checked the rear of the prop shaft where it joins the diff, 6 bolts altogether 3 in prop and 3 in diff (6 bolts going into the rubber) How many is at the gearbox end? any ideas? Thanks for the replies Ive had so far please, keep them coming, if you have any ideas at all, its all helpful for stuff to check Quote Link to comment Share on other sites More sharing options...
b_have Posted March 20, 2005 Share Posted March 20, 2005 There are four at the box end, these would have been removed to drop the box, so likely to be the ones. Quote Link to comment Share on other sites More sharing options...
absz Posted March 20, 2005 Share Posted March 20, 2005 to be honest i go for the cheapest option first which is to have all four wheels balanced again. the noise you heard could have been a balance weight coming of the wheel and hitting the underside. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 20, 2005 Share Posted March 20, 2005 to be honest i go for the cheapest option first which is to have all four wheels balanced again. the noise you heard could have been a balance weight coming of the wheel and hitting the underside. Seconded -Ian Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 Only trouble is, all 4 wheels have their weightss still on, and this happened with 2 different sets of wheels too, I even swapped the 18" wheels for the 16" wheels again just to see if it made any difference......Sadly, it made none I think I am going to have to get it up on a ramp and check the propshaft etc.... Has anyone heard of a diff breaking and causing a similar problem? If one tooth was broken in the diff, would it be a constant noise at any speed? Or would a wheel bearing cause this sort of problem? Or even a drive shaft? Thanks again for all the suggestions, and please, if you think of anything, please write your thoughts in here Kind regards Alex Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 20, 2005 Share Posted March 20, 2005 I actually had a tooth go on the diff of my MkIII Granada and my fucking god did you know something was up, it sounded like someone beating the chassis with a crowbar. So I doubt it's that. Wheel bearings whine when they are on their way out, and they usually have a fade-in point of about 30mph, so it's not that either. If they had suddenly and catastrophically failed you'd know that as well (yay, Granada again) However, as it's speed related and still occurs with the clutch in, I'd say a full check of the prop shaft UJ yokes, pins, bearings, the half shafts, and the diff itself perhaps would be in order... This level of mechanical stuff I'm not experienced in, you want someone like Chris Wilson to chip in -Ian Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 you want someone like Chris Wilson to chip in That would be lovely.......... Chriiiiis...Oh Chriiiiiiiiiiiiiisssss Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 My orevious post quoting Ian probably sounded better in my head than it did written down Quote Link to comment Share on other sites More sharing options...
Terminator Posted March 20, 2005 Share Posted March 20, 2005 May be a long shot, but have you checked the rear sub frame bolts and diff mounting bolts. You might try putting the car on stands and running it up to speed. Have you checked with the clutch place to ask what they undid when they changed the clutch! as from thye way your post reads the two event could be connected. Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 May be a long shot, but have you checked the rear sub frame bolts and diff mounting bolts. You might try putting the car on stands and running it up to speed. Have you checked with the clutch place to ask what they undid when they changed the clutch! as from thye way your post reads the two event could be connected. Without saying too much, I wouldnt give that garage the wasted air from one of my old rank farts.......I asked them, and they said..."Bollox, nothing to do with us!" I left it at that, safe in the knowledge that I will never ever go there again.... But, yeah, I think its related too I need to get it on a ramp to properly check it out, but cant get down to my garage in Cambs for at least another 3-4 weeks. Quote Link to comment Share on other sites More sharing options...
Terminator Posted March 20, 2005 Share Posted March 20, 2005 Aahh I was just wondering what short cut method they used to change the clutch. Judging by their reaction it was not a standard method. The only problem with a ramp is the car is static, I think you need a dymamic test, without load the vibration my show up at much lower speeds. I have had my car on strong stands with the speedo reading over 70 mph, minus wheels, without any problems. Quote Link to comment Share on other sites More sharing options...
ewizzy Posted March 20, 2005 Author Share Posted March 20, 2005 Aahh I was just wondering what short cut method they used to change the clutch. Judging by their reaction it was not a standard method. The only problem with a ramp is the car is static, I think you need a dymamic test, without load the vibration my show up at much lower speeds. I have had my car on strong stands with the speedo reading over 70 mph, minus wheels, without any problems. MOT ramp with a slide jack Although, I might try doing it on stands next weekend..... RE: that garage, I asked the guy when he was sitting down having his 2nd lunch break of the day, " How many Supra clutches have you personally changed......." his answer........ "this is my first" When I asked Chris the owner of the garage, how many he had done, he said " Loads, not a problem" They wernt even the cheapo place that I was going to take it to, I took it there as the owner has his own Supra running a big single T78 thingy, and a couple of people I spoke to recommended them (although they had only had minor stuff done there)..... Oh well, never mind, live and learn and all that! Right, I'm going to bed now the altitude up here on my soapbox is making me tired! I'll check back here in the morning though.....Thanks again for the replies, it really is appreciated Kind regards Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 21, 2005 Share Posted March 21, 2005 In that case they may have unbolted the prop shaft from the back of the gearbox and not put it back in exactly the right place, thus unbalancing the assembly much like an unbalanced wheel. I'm not 100% on how you rectify this, either realign the propshaft flange or possibly there is some way of balancing it? Give Chris Wilson a call, he'll know what to do and can probably do the job as well (properly!) His contact details are in his signature. -Ian Quote Link to comment Share on other sites More sharing options...
Steve Posted July 30, 2005 Share Posted July 30, 2005 Sorry for the thread resurection. Did you ever get to the bottom of this? Quote Link to comment Share on other sites More sharing options...
ivan Posted July 31, 2005 Share Posted July 31, 2005 Ditto - I fear I may have the same sort of vibration. A light but high frequency druming coming from the rear at about 80+. I'm going to get the rear wheels rebalanced before I get too worried. Quote Link to comment Share on other sites More sharing options...
Steve Posted August 1, 2005 Share Posted August 1, 2005 I have the balancing checked already. They are spot on. Quote Link to comment Share on other sites More sharing options...
normore1 Posted August 1, 2005 Share Posted August 1, 2005 Although the driveshft is externally balanced I have heard some anecdotal evidence that if after a clutch change you do not realign the shaft spline to the same position as before the change you may get vibration in the drive shaft. The recommendation is to mark with match up points before disassembling. Also if the center support bearing is bad or reinstalled improperly then it may also cause vibration. derek Quote Link to comment Share on other sites More sharing options...
normore1 Posted August 1, 2005 Share Posted August 1, 2005 Although the driveshft is externally balanced I have heard some anecdotal evidence that if after a clutch change you do not realign the shaft spline to the same position as before the change you may get vibration in the drive shaft. The recommendation is to mark with match up points before disassembling. Also if the center support bearing is bad or reinstalled improperly then it may also cause vibration. derek Quote Link to comment Share on other sites More sharing options...
blitz supra Posted August 3, 2005 Share Posted August 3, 2005 May be of some use But i had vibration and a clunk when taking up drive It was a driveshaft CV Joint (outer) But I had my whole shaft recon'd in Luton for about £120.00 just the joint only from Toyota is about £300 Clunk gone and vibration mine isa non turbo too, so judging by what i see from TT's I would say your shafts are under more strain than mine And they are the same part NA or TT Quote Link to comment Share on other sites More sharing options...
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