Randy, I have a spare BJ7 gearbox that has never been rebuilt, but I used it
for about 10 years in my BJ8. This was because the front bearing in the
original BJ8 gearbox broke up into a handful of metal fragments. The BJ7
input shaft also has about 1/8 inch lateral play at its forward end. I
never had any problem with the gears when this 'box was installed in my car.
Since the shaft is only supported at its aft end by the gearbox front
bearing when the gearbox is out of the car, there is going to be some amount
of lateral play in the shaft because of the inherent play in the bearing.
With the gearbox installed, of course, the shaft is supported at its forward
end by the pilot bushing in the end of the crankshaft and will not have as
much lateral movement.
I do not believe the input shaft movement is your problem, but if it were me
I would replace the gearbox front bearing for convenience. I tend to agree
with Mike Salter that you could be getting more than one gear due to
something wrong with the shaft interlock balls.
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC USA
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Randy Dickson
Sent: Tuesday, March 31, 2009 10:17 AM
To: healeys@autox.team.net
Subject: [Healeys] FW: Healey gearbox, rear end, driveshaft problems. MAYBE
SOLVED?
Fellow Healeyoids,
OK, I removed the gearbox with a little help from my wife last night and a
lot of Samuel Adams Imperial White Ale (10.3% Belgian Ale). It appears that
the input bearing is really worn. At the end of the 1st motion shaft it has
about a < inch of play. That is about 1/8 side to side. That seems like a
lot. Unless this is minimized by the bushing in the flywheel. I think that
I need a 1st motion shaft bearing. I will order one from Moss tomorrow.
Along with the caged bearings for the 1st motion shaft. It is a BJ8
gearbox, so it takes the caged bearings. I hate to go through the entire
gearbox when it was just gone through but this seems like the problem.
Maybe the side to side motion of the 1st motion shaft was the clunking and
reason why the car would not go into drive. Maybe more than one gear was
being engaged at a time with the wobbling of this shaft. Does this seem
plausible? Does this answer the problem as to why my car would go in
reverse, always, forward sometimes and give a loud randomized clunking while
idling in neutral? I will likely build up my extra BJ7 gearbox as well.
Thanks!
Randy
Healey Archaeologist
63 BJ7
60 BT7
66 Cobra replica
06 Mini Cooper S
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