Just finished the mainshaft nut fix and a clutch change on my F78, silly me forgot to check the gearbox before putting the engine back. now the stick is stuck in neutral and can't be moved anywhere except between the neutral positions of 1-2 and 3-4 (i.e. not to the far right). have tried turning over the engine and also pushing the vehicle with/without clutch engaged. the engine does get turned so the box is working, it's just that the stick is totally jammed!
could this be caused by doing the mainshaft nut too tight? i didn't have a meaty enough torque wrench so just used an extension bar, however if anything i'm pretty sure i tightened it to under the 200ft/lbs.
anyone have any brilliant ideas before i take the engine out again?