forfi_xr2

I install in a ib5 gearbox with rear starter mount a quaife differential with new bearings and ford racing puma internals , the problem is in the diff, when I close the gearbox it's blocked!!! no running free!! I don´t know whats happening

Churtz

Did u get the diff shimmed correctly?

2ndGear

iTrader: (2)

the diff crown wheels are different thickness on the ib5

AstoN_B

iTrader: (1)

Try and mark the edge of the crownwheel with a marking dye, engineers blue or similar, make sure inside of gearbox casing is clean, and bolt it together quick, it should leave blue dye anywhere it touches the case, then you can file/machine/grind it back to fit?

forfi_xr2

the problem was with 4th gear main shaft . I will put a photo