Yes it went into reverse Sunday night and come Monday morning it would go. Goes into all other gears easily. Now with that said, snce I bought it earlier this summer, it has always popped out of 3rd gear when under pressure.
Upon opening up the tranny from the top, I didn't see much abnormal. Now my shop manual talks about how the three pawls are held in raised position by a piece of wire. None of the three are in the raised position, or a piece of wire holding them up. Could be the problem or is that used when you remove the shifters only. If you have questions, I will be away from computer till later tomorrow. Thanks, Gregg
You install the wire to remove or disassemble the shifter fork assemblies.
Check to make sure your forks are straight, aligned with the gears, and not heavily worn. The other thing I would check is the spline wear on the countershaft. That's the forward top shaft that the gears slide around on. My 60's countershaft and gear splines were worn so bad that they allowed two gears to engage at once causing the shaft to bend like a banana and jam it up tight. Follow the shifter pattern around to see which fork it moves to engage reverse. It should be easy to figure out. Then you can investigate why reverse won't engage.