LETTERS
A tip for our Jack . . .
A strong suggestion for Jack Dobson, before he pulls the whole gearbox apart to find the problem causing it to jump out of fourth gear (LRM, February), is to check the spigot bush in the crankshaft, and to double-check the input pinion of the gearbox.
I had similar problems after replacing a slightly marked but serviceable pinion with a new replacement. The existing one had a small bevel on the edge
