waf102 Posted August 30, 2011 Share Posted August 30, 2011 1990 LS400 214k+ miles I have noticed that during the past few months I have had a hard 'clunk' when putting the car into reverse after starting up (high idle). If the car is warmed up (low idle) and I put it in reverse then it's smooth. I do not have any detectable problems going into any other gears at high or low idle. I drain and fill transmission oil (no flush!), only use T-IV, and have had the issue before and after the latest drain/fill. The level is correct. So...Transmission issue? Worn support? Drive shaft/bearings? (Yes, I looked at other postings, but didn't find same issue with same conditions.) Thanks! -Bill P.S. Also...may not be connected...but...I also notice that occasionally the rear of the car feels like its going over a slightly rough road (best I can describe). It's very slight...and I do need new struts in the rear. Maybe I'm being over sensitive.... Quote Link to comment Share on other sites More sharing options...
kyled Posted August 30, 2011 Share Posted August 30, 2011 Sounds like it could be lose bearings or your drive train. Either way, not a problem worth letting get worse. Lexus or not, cars should not be making a "clunking" noise. I would take it into a Lexus dealer or shop before it gets more severe (aka more expensive). Quote Link to comment Share on other sites More sharing options...
waf102 Posted August 30, 2011 Author Share Posted August 30, 2011 Sounds like it could be lose bearings or your drive train. Either way, not a problem worth letting get worse. Lexus or not, cars should not be making a "clunking" noise. I would take it into a Lexus dealer or shop before it gets more severe (aka more expensive). Bearings or drive train??? Could you put a finer point on it? Quote Link to comment Share on other sites More sharing options...
curiousB Posted August 30, 2011 Share Posted August 30, 2011 Bearings or drive train??? Could you put a finer point on it? Could be U-Joints in the drive axle. They wear over time and can get sloppy. I would also check engine and transmission mounts. The rubber breaks down on those and the engine might not be held in place as firmly as it once was. Quote Link to comment Share on other sites More sharing options...
jaswood Posted August 30, 2011 Share Posted August 30, 2011 Rear bushings, especially diff'l mounting bushings/cushions. Quote Link to comment Share on other sites More sharing options...
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