[Healeys] transmission

[Michael Salter]

Hi Gary,
IMHO the issue in your gearbox, which is quite common, is most likely to be
one, or a combination, of the following.
1. Excessive end float in the shafts causing the internal splines in the hub
to move out of engagement with the teeth on the gear. This is adjusted with
bearing shims and Bellville washers.
2. Wear on the engagement teeth (the little ones) resulting in them sliding
out of engagement with the hub as the thrust on the gear causes it to move
axially during the transition from drive to overrun resolved by replacing
the gear.
3. A selector fault preventing the hub from moving fully into engagement
when in gear.
Not to cast dispersions on Dave's recommendation but the purpose of hub
balls and springs is to result in an axial force being applied to the gear
cone by the syncro ring as the sliding hub is pressed toward engagement
which results in the synchronization of the gears.
I don't think they do much to hold the box in gear.

Michael Salter
100 (1953) #174
AHX12 (1953)
Bugeye (1961)
http://www.netbug.net/blogmichael/

-----Original Message-----
From: healeys-bounces+msalter=precisionsportscar.com at autox.team.net
[mailto:healeys-bounces+msalter=precisionsportscar.com at autox.team.net] On
Behalf Of Warthodson at aol.com
Sent: June 23, 2008 8:48 AM
To: healeys at autox.team.net
Subject: [Healeys] transmission

What causes a (BJ8) transmission to jump out of 2nd gear upon  
de-acceleration?
Thanks,
Gary Hodson