Janos:
I had an issue where truck was jumping out of gear. Same spec truck and box. Only realistic solution for that was recon box. About £3500 for box and fitting from my local dealer. Think they done it overnight too, so no downtime.
Rang a few of these ‘gearbox experts’ who adverise in trade press, and it was all ‘drop it off and we will take a look’. Once you calculate any potential savings against the loss of work, and inconvenience, dealership seemed the best option for me. Not had a problem since, and the only problem I have had with it in 5 yrs of running it.
Thanks for the reply, I’ve had someone tell me that it could be the gearbox ECU. Mine doesn’t jump out of gear, it just doesn’t go into gear sometimes… Like going from 7th to 8th it won’t go into 8th, so I have to either manually put it into 9th… or if going up a hill fully loaded can be a bit of a c**t when it doesn’t go into gear 