Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Gearbox

I only have experience of one gearbox rebuild, which i did twice. The selector rod interacts with the synchro hubs through the semi circular forks. So in simple terms a 4 speeder will have two selector forks (Plus reverse).
One selector fork will do 1st/2nd forward & back.
The other will do 3rd/4th. On a simple 4 speeder, 4th just locks input and output shafts together. A five speeder will be a bit more complex, depending on whether 4th or 5th is 1:1.
If all the gears are there, this suggests that the selector forks and synchro hubs are OK, but there's a locker which functions as part of the selector rod, and locks the other gears out.


This is a Ford Type 9 I found. You can see the single selector rod and the two main forks in bronze. The synchro hubs are immediately below. So those two bronze forks move left and right to get each gear, but when one moves, the other must be locked, and moving the gearstick side to side rotates the selector rod, which will disable one of those forks. When you get the top off, it should be apparent what's going on. Good luck.