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jumps out of 3rd

Posted: Fri Oct 29, 2010 8:12 pm
by win
Hi
I have a 1098 ribbed gearbox, which jumps out of 3rd gear on overrun only, if Iam pulling hard it remains in gear.
It is a gearbox which I rebuilt, using parts from 2 other boxes. As it is fitted in a series 11, I retained the original gear stick and extention tube, I have done this with a previous box no problem.
Before I strip it down again, can anyone point out which areas I need to pay attention to so I can over come this problem, when I rebuild it again.
Thanks Win

Re: jumps out of 3rd

Posted: Sat Oct 30, 2010 7:28 am
by bmcecosse
Worn dog-teeth on 3rd gear? Weak or missing detent springs/balls in 3/4 selector hub? Too much end play in main shaft bearings?