Daston Posted December 12, 2007 Share Posted December 12, 2007 Hey guys when my wheels are on full lock it feels like they are twitching accross the road like slipping a bit or knocking kind a hard to describe but the steering wheel twitches and it makes a slight scrape/knock sound. Anyone had this? Could it be tracking or bushes? Quote Link to comment Share on other sites More sharing options...
Guest mk47 Posted December 12, 2007 Share Posted December 12, 2007 bit of a obvious one but have you checked the insides of your tyres? as on mine due to camber settings the insides wear alot quicker than rest of tyres and when theyre on the way out they usually slip on cornerning Quote Link to comment Share on other sites More sharing options...
Daston Posted December 12, 2007 Author Share Posted December 12, 2007 tyres have only got 2000 miles on them still like new Quote Link to comment Share on other sites More sharing options...
Ewen Posted December 12, 2007 Share Posted December 12, 2007 Both MkIVs I've had do this when the weathers very cold. Wear is fine, and it doesnt do this in warmer weather. Obviously, checking geometry is a good idea, but I'm sure the colder weather / slippier roads exagerates the effect ? Quote Link to comment Share on other sites More sharing options...
CardiffSupra Posted December 12, 2007 Share Posted December 12, 2007 Mine has done this for ages, but for the last few weeks it's been really bad. I did read somewhere it could be something to do with the diff. Quote Link to comment Share on other sites More sharing options...
Homer Posted December 12, 2007 Share Posted December 12, 2007 This is quite common, apart from checking your tyre's for uneven wear, the most likely cause is the subframe bolts not being up to torque. Checking the subframe bolt torque is part of a regular service but is very often missed. If the bolts are loose it causes the entire subframe to move which causes a knocking from the entire front end and vauge suspension/steering feel. Quote Link to comment Share on other sites More sharing options...
RedM Posted December 12, 2007 Share Posted December 12, 2007 I get this but only when it's cold out. I reckon it's just fat tyres that are stone cold and on full lock (especially when reversing) they just slip (or drag) a little. Never happens once they are warm or during the summer. I'm also thinking that wet tarmac may play a part. Quote Link to comment Share on other sites More sharing options...
Homer Posted December 13, 2007 Share Posted December 13, 2007 I get this but only when it's cold out. I reckon it's just fat tyres that are stone cold and on full lock (especially when reversing) they just slip (or drag) a little. Never happens once they are warm or during the summer. I'm also thinking that wet tarmac may play a part. From the supra's I've driven hard most have a tendancy for some understeer in the wet when entering hard corners, resulting in the front skipping a little. However Daston says it's happening on full lock, so presumably when at very low speed (i.e. parking). This is a classic sign of a loose front subframe. Quote Link to comment Share on other sites More sharing options...
Stevie Boy Posted December 13, 2007 Share Posted December 13, 2007 If it's only when your on full lock, i take it this is low speed manuvoring, i'd be inclined to think it's down to the effects of the power steering system pressure relief. Purhaps the cold is having an effect on the viscosity of system fluid and making the symptoms seem worse, road/floor surface can produce unusual characteristics like this such as a twitching through the steering when manuovering on lock al 'la 3 point turn. If it is that it's nothing to worry bout, get your subframe bolts checked for tightness anyhoo, i used to get a slight clonk from mine just manuvoring/braking forwards and backward in a straight line at low speeds, which was cured by torquing up the subfarme bolts. Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 would a loose subframe creak homer? as I also get creaking when comming off the gas. Quote Link to comment Share on other sites More sharing options...
Guest mossy86 Posted December 13, 2007 Share Posted December 13, 2007 Is it coming from the back of the car from the diff?? Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted December 13, 2007 Share Posted December 13, 2007 would a loose subframe creak homer? as I also get creaking when comming off the gas. Yes it could cause creaking me old mukka Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 no defently from the front almost like its skipping across the road. I get creaking as well so that could be the cause,. Where are the bolts as I will check them over the weekend. Also what torque do they need to be at? Quote Link to comment Share on other sites More sharing options...
RedM Posted December 13, 2007 Share Posted December 13, 2007 This is a classic sign of a loose front subframe. ..but what if one's sub-frame is okay as mine is? I reckon it's cold, hard tyres sliding on damp/wet surfaces on full lock at low speeds. I bet it won't happen in the summer. Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 yeah its only started to happend as its getting colder Quote Link to comment Share on other sites More sharing options...
RedM Posted December 13, 2007 Share Posted December 13, 2007 yeah its only started to happend as its getting colder Thought as much but don't listen to me. I'm not one of the 'experts'. Quote Link to comment Share on other sites More sharing options...
Homer Posted December 13, 2007 Share Posted December 13, 2007 ..but what if one's sub-frame is okay as mine is? I reckon it's cold, hard tyres sliding on damp/wet surfaces on full lock at low speeds. I bet it won't happen in the summer. Well if the sebframe is checked, he can rule it out. Just recommending the most likely cause here Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 Yep will get that checked, wheres the bolts too? Quote Link to comment Share on other sites More sharing options...
Rob Posted December 13, 2007 Share Posted December 13, 2007 Chris Wilson posted about this years ago. It occurs most when reversing, as the two front wheels do not track together correctly at full lock. WIth soft warm tyres in summer they have enough "give" in them to flex and "absorb" the difference until you straighten out. However in winter, the tyre can only flex so much, then it skips a little bit across the tarmac to catch up, and that's the knock you feel and hear. It's nothing to worry about, it's all part of Toyotas design. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 13, 2007 Share Posted December 13, 2007 It's because you have wide, wrong offset front rims and tyres on it. Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 That is probably true however offset is the same as stock. Quote Link to comment Share on other sites More sharing options...
Wez Posted December 13, 2007 Share Posted December 13, 2007 My NA does this with aftermarket wheels, my TT with stock wheels doesnt Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 13, 2007 Share Posted December 13, 2007 It's because of the induced camber on lock from having a fairly high amount of castor angle as stock. Wider wheels exacerbate it, especially ones with low profile tyres and none stock offsets. The steering lock when manoeuvring unloads large percentage of the tyre width, and it skips rather than transfer load to the ground. Even a stock car will do this, to a certain extent, especially on loose surfaces like gravel. The wider the tyre, and the lower the sidewall profile, the worse this phenomenon will be. Quote Link to comment Share on other sites More sharing options...
Daston Posted December 13, 2007 Author Share Posted December 13, 2007 Cheers Chris that makes sense. You learn something new every day Quote Link to comment Share on other sites More sharing options...
Rob Posted December 13, 2007 Share Posted December 13, 2007 I said he said that, didn't I say he said that, I did. Quote Link to comment Share on other sites More sharing options...
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