5 GT Turbo Gearbox shimming

[Chris74#]

Guys, does anyone know where I can get a setting shim for a JB3 gearbox? I had to use a different case when restoring and need to re-shim it! Apparently!! Thanks

 

[Big Steve - Raider]

Guys, does anyone know where I can get a setting shim for a JB3 gearbox? I had to use a different case when restoring and need to re-shim it! Apparently!! Thanks

Isn’t your gearbox builder doing that..? Or are you building it yourself..??

Gearboxes are always an unknown for me.

 

[Chris74#]

Isn’t your gearbox builder doing that..? Or are you building it yourself..??

Gearboxes are always an unknown for me.

Yeah, I stripped and rebuilt it, but I messed up and decided that cleaning an aluminium case in caustic was a good idea! I then couldn’t get the caustic staining off so sent it to vapour blast. When I went to put it back together the bearing holes and oil seal holes had all grown I had to switch the case, out! I got that case vapour blasted, put it back together tested it before fully tightening the two case together and it works fine, as soon as I torque the cases up, I can’t get 4th gear at all!

 

[Aldo]

I'm not familiar with the gearbox but do the shims sit behind the bearing race? There are some generic shims available at www.bearingkits.co.uk that might suit?

I guess finding out what is under tension and by how much it needs adjusted is the tricky bit?

 

[Chris74#]

I’ll get it solved and report back!!