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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2022 Posts: 19 'Bolter | | 'Bolter Joined: Aug 2022 Posts: 19 | Hey guys,
I rebuilt my 3-speed last year and it is grinding 2nd to 3rd. 1st to 2nd is good and 3rd to 2nd is good. Would this be a clutch adjustment issue or synchro? There's about 1-1 ½" play in clutch pedal to *any* movement of the fork. The J-hook is almost to the end of adjustment with maybe ¼" left. The truck is a '44 with a '56 235. Not really sure where to start with this problem. TIA | | | | | Joined: Feb 2004 Posts: 29,778 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,778 | There shouldn't be that much free travel at the top of the clutch pedal movement. 3/4" to 1" is plenty to keep the bearing from spinning constantly and wearing itself out. Drop the dust cover off the bottom of the flywheel and watch the clutch disc when a helper depresses the pedal with the engine running. The disc should stop, not continue to spin, even with the trans in neutral. What kind of lube are you using? Some of the super slippery synthetic lubes will keep the synchronizers from working properly, but that would probably cause problems in all the synchronized gears, not just a 2-3 shift.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: May 2001 Posts: 1,904 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,904 | Try pausing for an instant in neutral before going on to 3rd. That eliminated the need for double-clutching on my '48. Not a fix, of course, but maybe it will provide clues.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
| | | | | Joined: Aug 2022 Posts: 19 'Bolter | | 'Bolter Joined: Aug 2022 Posts: 19 | If I remember correctly, it is 90W. | | |
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