20-09-2019, 05:35 PM
I had a similar problem on a 4-speed box, 1st & reverse would not engage without crunching the gears, after a lot of yanking the gearbox in and out (was getting quick at it!), I found that a rivet (may have been two) that holds the splines to the clutch disc was making contact with the gearbox boss/shaft that the release bearing fits onto, effectively preventing full disengagement. I overcame this by a dodge that someone else suggested and that was to fit thin spacers (washers with a slot cut) between the gearbox & crankcase, worked a treat. Cutting the washers allows them to be slid in position with just the gearbox nuts slightly undone, slightly fiddly as the odd one will fall out until they are all tightened.