mudmagnet Posted January 25, 2016 Share Posted January 25, 2016 While driving, the car developed a screeching noise like a slipping belt noise,but the noise goes away if the car is put in neutral while moving and there is no noise when stationary and reving the engine The noise is only there in drive and increases with the revs Any ideas what it could be Quote Link to comment Share on other sites More sharing options...
Phantom Posted January 25, 2016 Share Posted January 25, 2016 While driving, the car developed a screeching noise like a slipping belt noise,but the noise goes away if the car is put in neutral while moving and there is no noise when stationary and reving the engine The noise is only there in drive and increases with the revs Any ideas what it could be Exhaust manifold probably warped and pulled a head stud or two out, take the main engine cover off and see if you can spy any soot around the metal manifold gasket. You get a 'screeching' from the gap when under load. Pull the manifold off, get it machined flat, replace studs and refit with new gasket Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted January 27, 2016 Author Share Posted January 27, 2016 No soot and all the studs are in place Quote Link to comment Share on other sites More sharing options...
Dave W Posted January 27, 2016 Share Posted January 27, 2016 Blocked oil filter in the auto box perhaps ? How old is the box/how many miles ? Have you noticed any lack of drive/excess slipping ? Does it make the noise when in lock up mode ? Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted January 27, 2016 Author Share Posted January 27, 2016 Have no idea when the oil or filter were last changed car has done 120000 Did notice after the car had been stood for a week that it took a few seconds more before drive took up Quote Link to comment Share on other sites More sharing options...
dave88sw Posted January 30, 2016 Share Posted January 30, 2016 split flexi on the exhaust downpipe. Got to do my own... Quote Link to comment Share on other sites More sharing options...
Boydie Posted January 30, 2016 Share Posted January 30, 2016 If you take the time and trouble to read your ZF auto service manual the transmission fluid and fluid filter needs to be changed every 30,000 miles, If yours has done 120,000 it's well overdue ! Change the transmission fluid filter and transmission fluid and seeing as at least 6 litres of your ancient fluid will be retained in the torque converter, do yourself, and your gearbox a huge favour and change the fluid AGAIN after 500 miles to flush out as much of the old contaminated fluid as possible. If you don't have a service manual get a RAVE CD. Quote Link to comment Share on other sites More sharing options...
Sheffield Posted January 31, 2016 Share Posted January 31, 2016 While I agree frequent oil changes are a good thing, there is a school of thought that changing the oil on a box that has not had oil changes at proper intervals in the past can do more harm that good. There used to be a piece on the Ashcroft web site about this problem. The oil change can dislodge accumulated muck and cause problems. I suspect if the gearbox has not had an oil change for a very long time it may already be too late. Does the noise appear when the engine is working harder than usual, say up hill, at a fair road speed, go away or reduce if the throttle is lifted a little, but not be noticeable in normal easy driving? Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted January 31, 2016 Author Share Posted January 31, 2016 If you take the time and trouble to read your ZF auto service manual the transmission fluid and fluid filter needs to be changed every 30,000 miles, If yours has done 120,000 it's well overdue ! Change the transmission fluid filter and transmission fluid and seeing as at least 6 litres of your ancient fluid will be retained in the torque converter, do yourself, and your gearbox a huge favour and change the fluid AGAIN after 500 miles to flush out as much of the old contaminated fluid as possible. If you don't have a service manual get a RAVE CD. I have only had this car for a few months so that's why I have no idea as there were no records with the carI am working my way through all the service bits and changing all the worn bushes Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted January 31, 2016 Author Share Posted January 31, 2016 Found the cause of the noise it was the front prop cardan joint, the bearing had destroyed itself Funny though even though the bearing was shot there was no play in the prop Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 31, 2016 Share Posted January 31, 2016 Good find! Very weird symptoms, guess it only screeched because of the load on it. Quote Link to comment Share on other sites More sharing options...
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