3Rd And 4Th Jumping Out Of Gear

[G0DZLR]

just noticed today when i went to go into third gear, as soon as i shift up and then proceed to load it up, it jumps out of gear. and same deal with 4th aswell. 1st, 2nd and 5th are all fine.

iv had trouble pretty much since i got the box in the car last year of it going into 3rd and 4th, usually grinding itself in under only moderate load. what is the possible cause and solution to this? I am able to hold the gear in manually with the shifter but as soon as i let go it lets go aswell.

cheers...

[Simon-S14]

gearbox needs an overhaul to fix it so may as well replace or rebuild

[blind_elk]

My guess is that the spring behind the detent ball has broken, and as such does not hold the selector rod in place. You might be able to replace the spring without removing the 'box.

[G0DZLR]

My guess is that the spring behind the detent ball has broken, and as such does not hold the selector rod in place. You might be able to replace the spring without removing the 'box.

if that was the case wouldnt any gears hold?

[Spurdo]

its been a while since i rebuilt my box (same box) and im having trouble visualizing things but 3rd and 4th i think are on the same selector fork so thats where the problem lies. from what you describe, it sounds like it never really did this before. usually when cars start jumping out of gear it only does it occasionally for starters and gets progressively worse as the fork wears. but in your case it sounds like its gone from good one day, to not work at all the next, that i find really strange. but yeah sounds like its time for an overhaul.

i thought the detent ball/springs only acted to move the shifter back to the central position when not in gear? if thats correct then that wouldnt have much to do with this? or if i've got this wrong.. ignore lol

Edited January 4, 2011 by jonboy

[frogstarc]

vaguely remember reading that someone had installed a rubber boot/dust cover incorrectly (backwards?) at the bottom of the shifter and had a similar prob.