JCB 3c Gearbox rebuild

[davidbrown80]

hi can anyone tell me were i can get the infomation i need to rebuild the gearbox in my 3c mk2 i think a bearing might have gone or something as when i select high range theres a chattering noise from the gearbox but strangly enough its fine in low box. its a 2x5 speed manual box 1976ish
i would be gratefull of any help cant find much on stripping down and rebuilding one of theses boxes anywhere
thanks in advance .

[essexpete]

Don't forget that apart from the knowledge on here the Leyland/Nuffield tractor forum might be useful to you.

[essexpete]

Incidentally have you inspected the oil after it has been warmed up? You might check to see if there is any metallic debris.