Michael Salter said;
I am trying to help the original owner of a 100/6 with a gearbox
rebuild.
This car has an interesting history which includes, I understand, the
selling dealer installing a replacement engine and gearbox 2 weeks after
delivery.
The thing that is odd is that the laygear is not one that I recognize.
The
part number seems to be part # AEC3207. It has one less tooth on the
large
gear than the 1B3728 but the teeth are cut the same way.
I suspect that this may be for a sedan rather than a Healey as the
gearbox
input shaft has one more tooth than normal.
Can anyone offer any advice on this or does anyone have an AEC3207
laygear.
Mike,
I cannot tell you nos. but back in the late 60's and early 70's I
repaired my 100/6 with sedan gearsets using the original Healey
mainshaft for the overdrive connection.
Once I crawled under a Morris Issis with the nest of red-back spiders
and removed the g'box and another time a Morris Marshall. I cannot
remember if both were the same but one of the gearsets was as you
describe. The other gears on the cluster were the same no. of teeth as
the 100/6. The ratio of the constant mesh gears lowered the effective
ratios of 1st,2nd,and 3rd which was not desirable in itself but it did
make a bigger gap and more usefull 3rd/overdrive ratio. What the car
then needed was a diff ratio change,which I did not carryout.
On reflection the other gearset also had a different no. of teeth on I
think 3rd? and therefore would not interchange with the complete set of
gears on the Healey output shaft
I was able to visit the local library and they had in the reference
section a series of repair books which had all the ratios and nos. of
teeth. [ 35 years ago ]
There is a NZ contact near to me in Wollongong who sources Austin parts
from NZ as a business and I suspect he is upto date on the gear
situation an d may have parts. John Neuman [ Newman]
Joe
red one
blue one
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