nicky Posted November 7, 2017 Share Posted November 7, 2017 So it's unbearable and unsafe now... every time my car hits high speeds (on a private road of course) the rear end bounces side to side, I've met a few supra owners that have the same problem but don't know what it is yet as like me they haven't had the time to look for what's wrong? I've just go under the car on a jack (limited to what I can see) and I couldn't see much wrong? Has anyone had this problem and has fixed it? If so what did you do! It's driving me crazy Thanks Quote Link to comment Share on other sites More sharing options...
Al Massey Posted November 7, 2017 Share Posted November 7, 2017 Check nuts and bolts make sure none are loose. Check bushes and arms A crowbar would be handy. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 7, 2017 Share Posted November 7, 2017 Usually that's down to the rear upper wishbone joint/bushes worn. Also worth checking that one of your suspension coils/struts isn't completely shot Quote Link to comment Share on other sites More sharing options...
HarleyFDMD Posted November 7, 2017 Share Posted November 7, 2017 Certainly sounds like a bush/s failing Quote Link to comment Share on other sites More sharing options...
Scooter Posted November 7, 2017 Share Posted November 7, 2017 Worth releasing the handbrake and checking for bearing play? http://www.mkivsupra.net/vbb/showthread.php?202941-high-speed-wobble&highlight=high+speed Quote Link to comment Share on other sites More sharing options...
Scooter Posted November 7, 2017 Share Posted November 7, 2017 Some more bits to look at. http://www.mkivsupra.net/vbb/showthread.php?90514-wobble-in-rear&highlight=wobble Quote Link to comment Share on other sites More sharing options...
rider Posted November 7, 2017 Share Posted November 7, 2017 So many things could be wrong that cause this behaviour. Bouncing when travelling in a straight line suggests to me look for a broken spring or knackered shock first. Skipping when cornering then you'd be into ball joints, bearing play, bushes and even a broken sway bar as possible causes. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 7, 2017 Share Posted November 7, 2017 If you find an MOT station that still has powered shaker plates, usually used to check FRONT wheel suspension for play, and put the car on the ramp backwards, they will give the rear end a workout at normal ride height and show up whatever might be worn in the linkages. Hand brake fully off and the rear end jacked off the ground will allow you to wobble the tyres at 12.00 and 6.00 o'clock and and 9.00 and 3.00 o'clock to see if there's play in the rear hub bearings. This assumes a rear caliper(s) are not seized, which can give a stability issue in itself. Check you have some rear toe in, and that's it's equal on each side to the car centre line. Nothing beats stringing it up for this, IMO. Wear in the back end feels far more dramatic from the driver's seat than in the front end. It's like when a trailer starts to snake, the required steering inputs are not natural to what your inner ear and brain tell you is required, and it can make the situation feel worse. Don't discount uneven rear tyre pressures, or tyre damage, or even disparate makes of tyre on each side of the rear. Quote Link to comment Share on other sites More sharing options...
rider Posted November 7, 2017 Share Posted November 7, 2017 Out of alignment tyres can create instability to. Quote Link to comment Share on other sites More sharing options...
nicky Posted November 7, 2017 Author Share Posted November 7, 2017 Thanks very much for all the input and suggestions I need to get it on a ramp and have a look, my driveway just isn't suitable to check everything I need to check, I know there was minor play on the suspension coil on my passenger side but I figured only minor couldn't be causing that Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted November 7, 2017 Share Posted November 7, 2017 For me this was a wheelbearing. jack it up and check for play in the wheel by gripping it at the sides and top and bottom. Quote Link to comment Share on other sites More sharing options...
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