motorman1600 Posted July 10, 2017 Report Share Posted July 10, 2017 hello all, I have just finished rebuilding the M6 and having never driven one before, I need to know what are proper clunks and clicks and what is not. It does shift and runs good I believe, but here is the problem When starting out in either low or high or reverse, there is a clunk when I press on the pedal to go. if I leave it in that gear and let off the gas there is another loud clunk. When driving in either range low or high and the trans shifts it does make a faint sounding click and it shifts to the 2nd or 4th gear and drives fine. If I press on the gas and let off as before, there is no loud clunk. If this is normal then I am a happy guy, if it's not normal, then it seems i'll have to remove the trans and look for the problem. Thanks in advance, Bill Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted July 10, 2017 Report Share Posted July 10, 2017 The only sound you should hear is a click or a light clunk on auto upshifts. That's it. Quote Link to comment Share on other sites More sharing options...
dpollo Posted July 10, 2017 Report Share Posted July 10, 2017 Dodgeb4ya is right, but I would have a good look outside the transmission before taking it out. Universal joints, sliding spline, differential side gears, rear axle spring mounts and engine mounts all should be looked at. Also the brake drum and its driving flange on the back of the transmission Quote Link to comment Share on other sites More sharing options...
motorman1600 Posted July 10, 2017 Author Report Share Posted July 10, 2017 Thanks for the input. I replaced worn side gears in the diff. Not that. Motor mounts are new. Not that. It has to be torque related so. I'll take a look at the others. Quote Link to comment Share on other sites More sharing options...
motorman1600 Posted July 10, 2017 Author Report Share Posted July 10, 2017 Well, disconnected the drive shaft and clamped on the parking brake. Let out the clutch. Give a little gas and clunk. Let off the park brake and clunk. I made sure the large nut was torqued before doing the above. Quote Link to comment Share on other sites More sharing options...
dpollo Posted July 10, 2017 Report Share Posted July 10, 2017 Maybe "Clunk o matic " was a good name for the M6. Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted July 11, 2017 Report Share Posted July 11, 2017 (edited) Note this is a common wear area on a high mileage M-5/M-6 trans... Several items could cause a kinda wrap up feel when letting the clutch out Worn free wheeling countershaft gear with the 14 angled ramps on it ( would have very slight wear depressions on each ramp.. Worn 14 rollers.... Worn roller retainer..it's .made of brass and keeps all 14 rollers positioned correctly on the free wheeling countershaft gear and lastly the large forward free wheeling front gear ( the rollers can wear out the Inside diameter bore of that gear... All these items will cause a kinda feel like the rear axle is moving up and down when letting the clutch out in reverse or forward gears. Caused by the rollers moving to far up the ramps. Edited July 11, 2017 by Dodgeb4ya 1 Quote Link to comment Share on other sites More sharing options...
motorman1600 Posted July 12, 2017 Author Report Share Posted July 12, 2017 Thanks. I took it apart and will replace the rollers and retainer. The other stuff was already new Quote Link to comment Share on other sites More sharing options...
motorman1600 Posted July 28, 2017 Author Report Share Posted July 28, 2017 hi, I have figured out what was wrong. I purchased rollers that had the same part number but they were .004 larger and they were binding up the free wheel gear. I ordered all new small parts for the free wheel gear and put it back together. Installed it today and No more clunking .. car drives great. Thanks for the input. Helped me figure it out. 1 Quote Link to comment Share on other sites More sharing options...
knuckleharley Posted July 28, 2017 Report Share Posted July 28, 2017 (edited) 15 minutes ago, motorman1600 said: hi, I have figured out what was wrong. I purchased rollers that had the same part number but they were .004 larger and they were binding up the free wheel gear. I ordered all new small parts for the free wheel gear and put it back together. Installed it today and No more clunking .. car drives great. Thanks for the input. Helped me figure it out. Rollers with the same parts number,but a different size? Trying to figure out something like that is like trying to roll boulders up a hill. Congratulations! Edited July 28, 2017 by knuckleharley 1 Quote Link to comment Share on other sites More sharing options...
motorman1600 Posted July 28, 2017 Author Report Share Posted July 28, 2017 Well, The part number I was looking for was listed at the end of a few others. Not the same part. Caused a lot of frustration. Oh well. Fixed now Quote Link to comment Share on other sites More sharing options...
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