95 gmc sierra k1500 4x4 5spd manual. sound is similar to a bearing noise, slight leak at front of transmission. when clutch pedal depressed, noise goes away. could this suggest an input bearing going bad? clutch feels good, no slipping, just getting a metallic grating (spinning) noise. most noticeable under harder acceleration and in gears 1, 2, 3, and 5 (not there in 4th). before i get to ripping and tearing into this, just wondering if anyone has any suggestions to pinpoint noise.... good or bad... thank you.
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Re: 95 gmc sierra k1500 4x4 5spd manual noise
The leak is probably a separate issue from the noise. is the leak very bad? can you tell if it's engine oil or transmission lube/fluid? most likely the rear main bearing seal needs replacing. the noise is most likely the clutch release bearing. you should replace all components of the clutch assembly which include; clutch plate, pressure plate, release bearing and piolot bearing. also have the fly wheel resurfaced. while the trans is out, you can check the rear main seal and the trans input shaft seal and replace accordingly.
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You first have to remove the transmission, then remove the pressure plate and clutch disc from the flywheel. the pilot bearing in in the center of the flywheel it can be removed by packing the hole with grease then take a piece of round stock that is slightly smaller than the hole and giving it a quick sharp blow with a hammer this should force the pilot bearing out then wipe out the grease and install the new pilot bearing
My 2005 GMC 2500HD (8.1 lt) had the same problem. I just had an exhaust leak fixed today. The right front manifold bolts were broken and the manifold was warped. The repair was 6.5 hours labour plus gaskets, seals, bolts and the manifold machining (parts were $130 CDN).