Hey guys just picked up my e30 a few weeks ago and been having a blast driving it until yesturday i started to hear a tapping sound that within 10 miles turned into a loud thud like something is hitting the rear center of my car. when i clutch in and put it in neutral the noise goes away. could this be my driveshaft or csb? i have a 318is do i have to drop the exhaust to get to it? thanks for the help guys
odd thud sound
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is it only while accelerating? and yes, you need to drop the exhaust for either components.'84 318i M10B18 147- Safari Beige
NA: 93whp/90ftlbs, MS2E w/ LC, 2-Step
Turbo: 221whp/214ftlbs, MS3x flex @ 17psi -
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OK so i installed a reman driveshaft from driveshafts.com and im getting a vibration above 40mph and i can feel it in my seat. idk how i could of installed it wrong. i didnt separate each half to throw the balance off. i think my trans mounts are shot could that cause a issue with the driveshaft? anything i should check over to possibly help the situation? thanks for the help guys.Comment
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If the trans is shifted at all, it would put a bind on the driveshaft and cause a vibration. I'd start there.
Pre-loading might cause vibration, but I doubt it.Comment
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Check driveshaft phasing to be sure that the new shaft isn't out of alignment. Also make sure the CSB isn't installed backwards.
I installed a reman shaft from a reputable company and all of them vibrated until the 4th shaft was put in. Various issues between all of them.Comment
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well i have a update. i installed a second shaft from a reputable company and all is well no vibrations but 500 miles later the loud tapping sound is back. the original driveshaft had slightly choppy ujoints but the csb was fine. what could make this noise but disappear when i clutch in??Comment
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