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Jumps out of third
Posted: Tue Mar 03, 2015 8:21 pm
by Woodyalan
Hi there
My 1098 gearbox was noisy so I stripped it and replaced the bearings. That seems to have quietened it but now it jumps out of third gear (goes in OK but soon jumps out) which it didn't do before. All other gears are fine. Can someone tell me whats the most likely reason, its obviously something I've done or omitted to do.
http://www.mmoc.org.uk/posting.php?mode=post&f=4#Thanks
Alan
Re: Jumps out of third
Posted: Tue Mar 03, 2015 10:16 pm
by bmcecosse
Does it jump out on over run - or when under power? Did you renew any of the syncro rings - or gears ? Most likely is that a locking ball/spring have been missed in the rebuild - if everything is otherwise in good order, and there is no excessive endplay on the mainshaft ?
Re: Jumps out of third
Posted: Tue Mar 03, 2015 11:46 pm
by Woodyalan
I didn't renew any synchro rings or gears as I could see nothing wrong with them and my aim was just noise reduction. It jumps out under power shortly after engaging third. Feels like it wouldn't happen if you held it in third. The ball/spring theory seems likely, I'll try again, hopefully I won't have to take it all apart again.
Thanks
Alan
Re: Jumps out of third
Posted: Wed Mar 04, 2015 11:00 am
by bmcecosse
Under power = not good... I suspect end float...
Re: Jumps out of third
Posted: Wed Mar 04, 2015 4:30 pm
by katy
I stripped it and replaced the bearings.
Did you use the spacer(s) on the rear bearing, to make up the difference between the original and the new bearing?
Re: Jumps out of third
Posted: Thu Mar 05, 2015 9:44 am
by Woodyalan
No, I didn't realize that's what they were for. Would it make that much difference?
Re: Jumps out of third
Posted: Thu Mar 05, 2015 11:03 am
by bmcecosse
Fraid so.....
Excessive end float and therefore not fully engaging the dog teeth.....
Re: Jumps out of third
Posted: Thu Mar 05, 2015 6:12 pm
by katy