Hello Jim; My last email had the table all over the place. Perhaps this one
will work better. It is taken from a Laycock paper with a listing for all
A-Type OD in various vehicles. I also added the early 32% in the first 100's.
--Scott Morris, Simcoe, Ontario, Canada; '60 MkI BN7, '62 MkII BT7
Laycock de Normanville Overdrives : A-Type Ratio_____Serial
No._____Model_____Hydraulic Pressure P.S.I
SN32____1260________AH100____??????
SN28____1292________AH100____420-440
SN28____1447________AH100-6___470-490
SN22____3009________AH3000____470-490
SN22____3087________AH3000____470-490
REF:
Laycock Overdrive - Section 1: Working Principles, Maintenance and Fault
Finding , Laycock Engineering Ltd, Undated
-- "Original Austin-Healey", Clausager 1990, pg 25
bluechip <bluechipracing@snet.net> wrote:
I have a sideshift gearbox /overdrive assembly I am trying to identify. the
gearbox number is 10771, the OD is 22/3009/005148. It has the long shifter with
the two bends, so I think it might be from an early 3000 mkII. None of my
reference books delineate the gearbox or OD numbers with respect to car model
or year. Any help would be appreciated. Jim Smith East Hampton, CT
J. Scott Morris - Keep Smiling, Murphy Lives
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