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Old Mar 22, 2025 | 01:11 PM
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TRANSMISSION MALFUNCTION

What would cause a 1 1/2 ton non-synchro 4-speed to pop out of fourth gear?
 
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Old Mar 22, 2025 | 01:55 PM
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Worn shaft, worn shift fork, worn shifter. One or all.

 
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Old Mar 22, 2025 | 05:27 PM
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Worn trans mounts?
 
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Old Mar 27, 2025 | 01:40 PM
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My 1940 1-1/2 ton 4-speed slipped out of 3rd when I bought it. A mechanic swapped in the gearset from a spare tranny and installed new bearings, etc. to solve it. 3rd gear was bad.
 
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Old Mar 27, 2025 | 01:52 PM
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worn gear and slider hub,
 
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Old May 3, 2025 | 12:37 PM
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UPDATE: The pin that inserts through the threads for the cap on the shifter and engages into a slot on the shaft was worn so that it was tapered and too short, so the shifter was not properly held in place. A new one was made, and three new detent springs were installed - should be good for another 75 years! Huge thanks to Anthony, of Coachcraft (Fillmore, CA) who had it diagnosed over the phone and had it fixed in a few days.

 
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