FlrSupra Posted July 1, 2010 Share Posted July 1, 2010 (edited) Ok.. been worried a little. My N/A -94 Supra has started to shake randomly. Someday it does go smooth and somedays shakes very violently. It can be felt from very low speed like +10mph up all the way to higher speeds. When reaching over 60mph the shaking seems to go away a bit... (???) Steering wheel itself doesnt shake at all. I can feel the shake "up on my ass" and from the foots (pedals are not shaking). It doesn`t make any difference if I accelerate, keep it steady, brake or press clutch down. - Wheels have been balanced month ago. - Alignment, camber etc. have been adjusted month ago. - Rear shocks been replaced with new ones - Wheels do have correct sized spigot rings Any ideas anyone? Edited July 1, 2010 by FlrSupra (see edit history) Quote Link to comment Share on other sites More sharing options...
Smallshinyant Posted July 2, 2010 Share Posted July 2, 2010 Got to ask if tyre pressures are ok and they if they have even tread all the way round? Quote Link to comment Share on other sites More sharing options...
PJ Posted July 2, 2010 Share Posted July 2, 2010 Sticky brake calliper perhaps? Quote Link to comment Share on other sites More sharing options...
Stonkin Posted July 2, 2010 Share Posted July 2, 2010 Its not missfiring causing the shake is it? Quote Link to comment Share on other sites More sharing options...
The Raven Posted July 2, 2010 Share Posted July 2, 2010 Drop links? Quote Link to comment Share on other sites More sharing options...
Dnk Posted July 2, 2010 Share Posted July 2, 2010 Really tricky to diagnose so best to start crossing the really silly stuff off the list of possibles then go from there. When did it start doing this ? Is the engine running fine ? Does it change gear okay ? Check all the wheels are on properly and all the nuts are tight. Check wheelbearings Check engine mounts Check propshaft Quote Link to comment Share on other sites More sharing options...
Konrad Posted July 2, 2010 Share Posted July 2, 2010 also check rear subframe bolts Quote Link to comment Share on other sites More sharing options...
Chewie Posted July 2, 2010 Share Posted July 2, 2010 I had a speed related shake problem a few years. Coincidently my office had relocated so I was commuting on a dual carriageway from front door to desk at *** leptons instead of crawling along in a grid lock. The problem disappeared when I had new tyres put on. I can only put it down to the way the tyres wore. Quote Link to comment Share on other sites More sharing options...
Stonkin Posted July 2, 2010 Share Posted July 2, 2010 Come to think of it i also had a strange vibration / whobble on a 325i. It turned out to be a 12 inch slash on the inside tyre wall on one of the rear tyres. It hadnt gone all the way through but was bad enough. Worth having a look. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 2, 2010 Share Posted July 2, 2010 Seized rear caliper or caliper slider, damaged propshaft centre bearing or rear doughnut are the things I'd check first. Quote Link to comment Share on other sites More sharing options...
paulrenn Posted July 2, 2010 Share Posted July 2, 2010 rear doughnut are the things I'd check first. Does this require a mirror or just extreme flexibility? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 2, 2010 Share Posted July 2, 2010 A ramp is the weapon of choice, or find a local limbo dancer. Or are you being rude.... ?? Quote Link to comment Share on other sites More sharing options...
FlrSupra Posted July 2, 2010 Author Share Posted July 2, 2010 Really tricky to diagnose so best to start crossing the really silly stuff off the list of possibles then go from there. When did it start doing this ? Is the engine running fine ? Does it change gear okay ? It just started to do it randomly.. first it was slight and now somedays it`s real bad, then it`s slight again and somedays doesn`t feel at all. Car does run fine and gear changes are smooth. Does rev without any lags, hesitations or other faults. Just shakes randomly and is real pain to drive somedays .. and also tires are new with 500miles behind them and I have made sure the pressure is good. ... great list of parts to check. Thanks for contributing. Hope somebody has had same kind of experiences and could pinpoint the problem :/ Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 2, 2010 Share Posted July 2, 2010 After it has made the vibration for a while feel the back wheels and see if they are mad hot. A sticking caliper will generate a LOT of heat. Have you checked the auto box fluid level correctly, which is with the fluid warm after a run, and with the engine idling in Park on a level surface? Too much or too little fluid are very bad.... Quote Link to comment Share on other sites More sharing options...
FlrSupra Posted July 2, 2010 Author Share Posted July 2, 2010 After it has made the vibration for a while feel the back wheels and see if they are mad hot. A sticking caliper will generate a LOT of heat. Have you checked the auto box fluid level correctly, which is with the fluid warm after a run, and with the engine idling in Park on a level surface? Too much or too little fluid are very bad.... It`s a manual and I have document of recent gearboxfluid change (owned the car for 3 months now). Will check the back wheels after next run, good tip, thanks! Quote Link to comment Share on other sites More sharing options...
Dnk Posted July 2, 2010 Share Posted July 2, 2010 Good luck with finding whats wrong and only too happy to try to help, i've never suffered anything like what your describing so im trying to think outside the box so to speak. If you can't find anything it might pay you to get it bolt checked and get it on a ramp and go over all the suspension, subframes, driveshafts etc Quote Link to comment Share on other sites More sharing options...
FlrSupra Posted July 3, 2010 Author Share Posted July 3, 2010 I noticed weird thing today! In morning we had little bit cold night here and I left to work and found out the shaking was literally pretty bad. When I left from work in the middle of day we had superhot day +30celcius and car went smooth with no shaking for 15miles. Then later in the evening when the temperature went low I took a short trip and it was shaking from the first mile for whole drive. Can temperature be the effect or was that just coinsidence? Quote Link to comment Share on other sites More sharing options...
paulrenn Posted July 5, 2010 Share Posted July 5, 2010 Just noticed you are up here FlrSupra...give Krister a shout, maybe he can take a look for you. Maybe some sensor/wiring is faulty or has intermittant problem. Quote Link to comment Share on other sites More sharing options...
FlrSupra Posted July 5, 2010 Author Share Posted July 5, 2010 Just noticed you are up here FlrSupra...give Krister a shout, maybe he can take a look for you. Maybe some sensor/wiring is faulty or has intermittant problem. PM`d... thanks for the tip. Quote Link to comment Share on other sites More sharing options...
AlanM Posted July 6, 2010 Share Posted July 6, 2010 Are you not getting brake warning light as well (in another thread).. Check rear brakes .. Quote Link to comment Share on other sites More sharing options...
2soops Posted July 6, 2010 Share Posted July 6, 2010 Have you checked the tyres for bulges and swelling, my brother had a nearly new tyre which the tread start to come off after about a month, pirelli i think. Maybe it would make the shake worse when cold and rubber not soft like it is when it warms up! Quote Link to comment Share on other sites More sharing options...
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