[svxistentialist]

OK Laz,

This is what the manual says to check when the symptom is "No shift occurs from 2nd to 3rd gear"

Lower numbers indicate most likely problem, good news in your case:

2: Control unit [aka the TCU ]
22: Control valve
38: High Clutch
43: One-way clutch [3-4]

The last two are inside the box, must dismantle to check or fix.

Ring the dismantlers straight away, tell the guy you want the Transmission Control Unit, or else you will be looking for your money back. It is pretty easy to install, and if the newer TCU works all 4 gears for you, then you're laughing.

Regards the Control valve, I don't know exactly which one they mean here, but Harvey would. These valves are in the gearbox sump, there is a cassette with maybe 6 of them there. The good news is, if the ones in your old box are OK, it is easy to drop the sump, and install your cassette of valves into the new box. Again, if this works, you are laughing.

Both of these things above are pretty easy to do. If neither works, then it will mean a clutch is gone and the box has to come out.

Joe

I would be looking for that TCU pronto!