[Healeys] first motion shaft identity and laygear endfloat

[J. Scott Morris]

Hello Randy;B  If I understand correctly, your first issue is that you simply
want to know which first motion shaft goes with your BJ7 gearbox.B  You are
correct; it is the AEC 3472 first motion shaft or drive.B B The other first
motion shaft,B 22 B140 is for the BJ8.B 
B 
The attached table, which details all the transmission gear part numbers from
the 100 through to the 3000B BJ8,B was compiled from the following sources:
Austin Healey Club, Pacific Centre b Healey Highlights, Nov 1983, B pg 6
Hambro Automotive Corporation: Parts and Service Bulletin No. 144, July 28,
1961
BMC B Fast Moving Parts List, 1965, B pg 24-29
B 
Regarding your second issue, amount of endfloat, I mustB leave to others to
respond.
B 
--Scott Morris; Simcoe, Ontario, Canada; '60 BN7 & '62 BT7
J. Scott Morris - Keep Smiling, Murphy Lives

--- On Sat, 4/18/09, randy dickson <rdickson at midwestarchaeology.com> wrote: <<
B 
Fellow Healeyoids,B  I'm having trouble identifying which is the correct first
motion shaft.B  I have two complete gearboxes plus lots of other parts.B  It
has been awhile since I assembled a gearbox so I want to know which first
motion shaft goes with my BJ7 box.B  I think that it is the AEC 3472 first
motion shaft.B  I know that the BJ8 first motion and main shaft are
different.B  The other first motion shaft is a 22 B140 (BJ8???).B  It appears
that on the BJ7, the bearings (18) that accompany the first motion shaft are
longer, and different than the BJ8 box.B  I've got the BJ7 box mostly together
now with the first motion shaft installed.B  I just want to double check, that
I have correct first motion shaft installed.B 
B 
Endfloat on the laygear is between .007-.0016. I read that .0012 is the limit,
but the end of the laygear is not perfectly even (thanks to the machine shop).
The front of the box contains the much larger bushing.B  Shouldn't the real
thrust be toward the large end anyway? I wonder how long the gearbox will last
with a larger endfloat?B  Is it just noisier or does it fail quicker.B 
Thanks! >>




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[demime 1.01d removed an attachment of type application/pdf which had a name of Gears-Part]