Posted April 9, 201410 yr comment_445440 My 70 240z has a hell of a noise. From a stand still, it ratchets, about 4-5 times. Once on throttle, no more noise, but it occurs if i let off throttle, and then back on. Its not there at any other time, and i cannot seem to find what it could be. Anybody had anything similar, or ideas on where to look?Thanks. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/ Share on other sites More sharing options...
April 9, 201410 yr comment_445442 Get under your car and look at the U-joints in the drivetrain. Inspect for wear. Make sure the differential is not able to move around. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/#findComment-445442 Share on other sites More sharing options...
April 10, 201410 yr comment_445508 The ratcheting, You can hear it, can you feel it as well? What part of the car is it coming from? Can you feel it in the shifter, the body, the seat or the pedals? Also, have you noticed any changes in the car previous to this noise? Any info you can share, no matter how trivial, will be a big help. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/#findComment-445508 Share on other sites More sharing options...
April 11, 201410 yr Author comment_445563 The ratcheting, You can hear it, can you feel it as well? What part of the car is it coming from? Can you feel it in the shifter, the body, the seat or the pedals? Also, have you noticed any changes in the car previous to this noise? Any info you can share, no matter how trivial, will be a big help.I have replaced the ujoints in the driveshaft, and will be replacing the ones in the half shafts soon. Its more a noise, kinda able to feel it. seem to be coming from the rear suspension. The noise has always been there, as im just partly into a restoration of the car. replaced the springs as well, but the noise was there before and after. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/#findComment-445563 Share on other sites More sharing options...
April 15, 201410 yr Author comment_445826 I can feel the nose when i touch the suspension upright in the rear. I plan to tear it all apart soon, but would love to knwo if anyone has any experience in this. Thank you. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/#findComment-445826 Share on other sites More sharing options...
April 15, 201410 yr comment_445844 I had a thunking noise in my 240Z at one point, whenever I got on or off the throttle (though I would not describe it a s a ratcheting sound). Turns out the rubber on the diff mount was completely torn free from the metal portion of the mount. Replacing the mount solved my problem. Not sure if that is the problem you have though. Link to comment https://www.classiczcars.com/forums/topic/48991-help-cannot-find-noise/#findComment-445844 Share on other sites More sharing options...
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