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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #1  
Old November 9th, 2020, 04:42 PM
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Robert B. Robert B. is offline
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Default Occasional slip out of 4th gear

‘63 GMC 3/4t, 305E V6, 4-wheel drive, 4 on the floor, 511 front and rear (75k miles). On occasion, at cruise speed, the stick pops out of 4th gear to neutral. Any recommendations regarding diagnosis and fix? Thanks in advance guys!


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Old November 11th, 2020, 09:05 PM
BillT BillT is offline
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Default Re: Occasional slip out of 4th gear

Usually a sign of a bad Synchro.
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Old November 11th, 2020, 09:09 PM
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Default Re: Occasional slip out of 4th gear

Super, thought that was a possibility, thanks Bill. Next level maintenance for me


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