I would think that you have problems with the 3rd gear synchro operation. I have no idea what changed. Most of us start double clutching when these problems start to appear. If you shift really early and it works, I would say it is a synchro problem. You could also bring the idle up some with the cable control and see if that affects it. Some folks find that a heavier transmission oil helps the synchros work better.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


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