ManwithSupra Posted May 29, 2013 Share Posted May 29, 2013 (edited) As some of you may have seen on the Track day thread that my car has suffered from some major violent vibration from the rear of the car on the way back from my recent track day:(. I just wanted to see peoples suggestions on what it may be before I start ripping the reat all down. Basically the car is fine up to around 25mph after that the rear starts to vibrate loudly and it shakes the car quite badly. Now from what I can tell there is no crunching sound coming from the car that I can remember (I pulled over very quickly and then got it recovered) So the only things I can think of it being would be either the diff or a drive shaft issue. Has anyone had anything like this before, if so what were your findings? I will be having a look at it this weekend and it maybe plainly obvious what has failed but it would be good to check what other people have had so if its not obvious then I can eliminate these first …. I.e. cheating Edited August 12, 2013 by ManwithSupra (see edit history) Quote Link to comment Share on other sites More sharing options...
johnny g Posted May 29, 2013 Share Posted May 29, 2013 Have you check the wheel for play, in case it's a bearing? Also, are the wheels still balanced? The simple things as you say. Quote Link to comment Share on other sites More sharing options...
Littler Posted May 29, 2013 Share Posted May 29, 2013 I was thinking wheel balance too as I lost a wheel weight and there was a vibration after about 30mph, got it rebalanced and it was sorted (given this wasn't the supra though) Quote Link to comment Share on other sites More sharing options...
Dnk Posted May 29, 2013 Share Posted May 29, 2013 (edited) Check the wheel nuts are tight, i was called out to a car that had this problem last year and 2 studs were missing and the other 3 nuts were loose Also check the tyre is okay all over, no bulges etc, I'd be surprised if its wheel balance though unless its miles out and at such low speed as that usual comes in after 50 mph and would have to be bad on the rear to cause major vibration but worth checking Then check wheel bearing, drive shaft, prop shaft, suspension arms etc etc Edited May 29, 2013 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted May 29, 2013 Author Share Posted May 29, 2013 (edited) cheers guys I have not had a look at the car as yet, I was so tired from getting back from the day I just popped it in my workshop and went home lol. I have experienced unbalanced wheels before but nothing on the scale of vibration I was getting this time. It also may be worth noting it was not a high speed/pitch vibration but a slower deeper more mechanical rotating vibration which i suppose could be a major wheel bearing failure or something other than the diff. I will still check to see if the weights are there to tick it off the list. So things to check so far... Wheel Play Wheel Weights Wheel Nuts and Studs (I did check to see if they were all present) Tyre Condition (should be ok as they are fairly new but still). Drive Shafts PropShaft All rear suspension components Edited May 29, 2013 by ManwithSupra (see edit history) Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 1, 2013 Author Share Posted June 1, 2013 Hi All, Ok I have checked for wheel bearing play, seems fine, no missing wheel nuts, wheel studs are all present as well as wheel nuts, wheels are not warped or damaged, tyres are in good condition with no bulges, Drive shafts "look" fine, Rear suspension components are all fine.. Right onto the things I have found I seem to have sprung a small diff Oil leak on left hand side of the diff (as you look down the car from the back) I looked for where it could be coming from and quite honestly I am baffeled as the Driveshafts seals seem dry. I have also found that I still have a leak on the transmission main output shaft seal as there is fluid on the flat floor (its not the selector shaft seal as I replaced that before the track day). My main concern is the gearbox, prop and diff Please watch the following video. [video=youtube;qH-ClhIj__8]http://www.youtube.com/watch?v=qH-ClhIj__8&feature=youtu.be As you can see there is movement on the prop in the center bearing. I am not sure if thats usual or not? As the speed increases you can feel the same freqency vibration on the body work as you can see the shaft shaking in its bearing. I did try it in 4th gear idle but it started shaking so badly I felt it unsafe to carry on. Now I have not got an idea what this could be, Bent Propshaft, A Gearbox output shaft issue, a Diff issue (as also i seem to have a new diff oil leak now) I have also noticed that the companion flange on the gearbox seems to have a kink in it?? I also noticed that the Rubber doughnut has some cracks/splits in it (at least 1 split around each nut)... Would this be the cause of the Vibration.. To be honest I am a bit stumped. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 1, 2013 Author Share Posted June 1, 2013 I Suppose the best thing to do would be do start dismantle it and check as I go working from back to front until I get to the issue. Any suggestions though would be great Quote Link to comment Share on other sites More sharing options...
Abz Posted June 1, 2013 Share Posted June 1, 2013 The first thing I thought of when reading it was propshaft, although not a Supra I had a similar experience in an SL63 which was fine around town and then when you got over 50mph you had this horrid shake from the rear. At first I thought it might be the wheels are buckled and also the rear tyres didn't have too much thread in them. Took it to the local garage who swapped the wheels and balanced it, went out and did 50mph and it seemed fine... thought great but then at 55mph the vibration came back! Garage chap had another look and then we both noticed the propshaft was dented like a rock or something had hit it hard!! Swapped over at MB and that seemed to have sorted it. Not sure if the Supra prop should be shaking like that but at a guess I'd say it shouldn't. Don't have my Supra with me or I would have jacked it up and had a look for you fella. Quote Link to comment Share on other sites More sharing options...
Dnk Posted June 1, 2013 Share Posted June 1, 2013 I'd give Keron a call and see if hes got a prop etc in good condition and swap the lot. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 1, 2013 Author Share Posted June 1, 2013 Cheers guys, the only issue is the prop I have has been shortened so the only way really to check the prop is to get another one made up. I am guessing if that is something it could be then I may as well get it done and get it out of the way lol. Perhaps I Should get custom one made up instead of chopping up a old propshaft... I was reading Jamie P had one made up or was looking to get one made up by a UK company for his Supra. Quote Link to comment Share on other sites More sharing options...
Dnk Posted June 1, 2013 Share Posted June 1, 2013 Cheers guys, the only issue is the prop I have has been shortened so the only way really to check the prop is to get another one made up. I am guessing if that is something it could be then I may as well get it done and get it out of the way lol. Perhaps I Should get custom one made up instead of chopping up a old propshaft... I was reading Jamie P had one made up or was looking to get one made up by a UK company for his Supra. Who made the prop, i'd be giving them a call and see if they can have a look at yours Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 1, 2013 Author Share Posted June 1, 2013 Who made the prop, i'd be giving them a call and see if they can have a look at yours Will need to find out from Ryan, I may get a lightweight one made up anyway. May as well if it's all coming off lol Quote Link to comment Share on other sites More sharing options...
wile e coyote Posted June 1, 2013 Share Posted June 1, 2013 Have you checked that a brake piston has not stuck on as this is really bad when it gets hot Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 1, 2013 Author Share Posted June 1, 2013 Have you checked that a brake piston has not stuck on as this is really bad when it gets hot Yeah all brakes are free. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 3, 2013 Author Share Posted June 3, 2013 (edited) Right going to start enquiring about getting a new custom prop made up (rather than cutting and welding an old one like the one on the car currently) also going to look at getting replacement driveshaft’s, rubber propshaft mount, replacing the rear hub bearings and maybe look at a replacement Diff if changing the other things does not work. Anyone have any suggestions on custom prop manufactures? So far I have heard Bailey Morris are pretty good? Edited June 3, 2013 by ManwithSupra (see edit history) Quote Link to comment Share on other sites More sharing options...
chazuk Posted June 3, 2013 Share Posted June 3, 2013 I bet its the diff what lsd is it ? Reco prop will balance and sort out the joint if needed for not allot of money, I need a new doh nut aswell although I think I read on here you can not buy them spreate only comes with a new prop. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted June 3, 2013 Author Share Posted June 3, 2013 I bet its the diff what lsd is it ? Reco prop will balance and sort out the joint if needed for not allot of money, I need a new doh nut aswell although I think I read on here you can not buy them spreate only comes with a new prop. Just a Standard Auto LSD. I am not ruling out a Diff issue but after reading so many people mentioning the prop I am probably looking at a Prop issue I had a conversation with Chris Wilson earlier just to go over the issue to which he also said it could be a prop issue, so I am going to send my prop off to see if there is an issue with it and if there is see if it can be rectified. If it does end up being the prop then I will get another one made up in Ali or Carbon and keep the repaired one as a spare. It’s a shame that Toyota don’t sell the Rubber Doughnut separately, I would like to change mine really I don’t like having cracks in things. Quote Link to comment Share on other sites More sharing options...
chazuk Posted June 3, 2013 Share Posted June 3, 2013 Just a Standard Auto LSD. I am not ruling out a Diff issue but after reading so many people mentioning the prop I am probably looking at a Prop issue I had a conversation with Chris Wilson earlier just to go over the issue to which he also said it could be a prop issue, so I am going to send my prop off to see if there is an issue with it and if there is see if it can be rectified. If it does end up being the prop then I will get another one made up in Ali or Carbon and keep the repaired one as a spare. It’s a shame that Toyota don’t sell the Rubber Doughnut separately, I would like to change mine really I don’t like having cracks in things. Hey Rich it could be prop if it was cut and shut thinking about it, don't count me on the doh nut would have to check with Toyota mine is the same hope you get it sorted soon . Quote Link to comment Share on other sites More sharing options...
2soops Posted June 5, 2013 Share Posted June 5, 2013 The rubber donut is available from Toyota as I asked only Friday last week as I have exactly the same prop issues as you, they are over £200 each though. My centre bearing moves around just like yours, and both uj's have slight play which I'm told is from running too straight. Would be interested to know your findings as I've got to sort the same issues Quote Link to comment Share on other sites More sharing options...
mellonman Posted June 6, 2013 Share Posted June 6, 2013 as 2soops says they are available but costly, i bet power flex could make them for cheaper if you call or sent them the dimentions as i had some bushes special made before . Quote Link to comment Share on other sites More sharing options...
David P Posted June 7, 2013 Share Posted June 7, 2013 (edited) Fit a new oil seal to the diff and refill with an oil you're happy with. It could be prop-shaft or a drive-shaft, yet I reckon swapping in a decent donut stands a good chance of solving the problem. Whilst it's out, check the diff spacers are fitted and correct. Edited June 7, 2013 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
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