Hi folks... I just bought my 2nd super four and took it for Mot and passed... but unfortunately the previous owner told me nothing about the jerks, or slips, every 2 - 3 seconds under load I'm not happy since I do lot of motorway miles...
Anyone knows how much time will take me to replace the complete gearbox? the engine it's going sweet and would be another gamble to replace the whole unit. I have spent £250 to get through MOT (tyres, pads, fork seals, and front bearing). Help

Regards

Slip or jerk as you describe it would indicate a problem with the clutch, so not so complicated and a lot easier to cure .
Check the clearance first, check that the cable has not frayed and is sticking in the outer casing.

I don't think it's has anything to do with the cable. I have replaced the cable too. I should have specified in my previous post that only does it on 6th gear over 2000 revs. I can pull up wheely on 1th and 2nd so definitely (and unfortunately) not the clutch or clutch cable as I can ear a grinding noise that make me comeback to 5th.

Anyone knows how long would take me to open up the engine an replace the gear cones? can it be done without removing cylinder blokes?