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Jedi Warrior
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G'day all,
Is there a 100 specialist among us who can help with my rather obscure enquiry?
I have two used 100 BN1 type cluster gears, one bears part number 1B-3693 & the other is 1B-3694-JBE. Both these items have the same helical angle on the third speed gear (‘third’ of course being ‘second’ in the BN1 application). Among my collection of odds & ends I found another cluster (with several teeth broken off the ‘third’ gear) which has a different helical angle. The latter item bears the part number 1B3474.
According to Clausager's “Original Austin-Healey” a note on page 45 lists ‘Other mechanical changes’ (at the end of the list of 'production changes - by engine number') and states that: "From gearbox number 5146 (in Mar 1954?) a modified third speed mainshaft with larger and stronger gear teeth was fitted."
Anderson & Moment’s 'Restoration Guide' doesn't make a reference to this change.
Does anybody know which part number came first? Can we assume that 1B3474, being the lower number came from a pre 5146 gearbox? I am trying to figure out if my 100 has the strengthened gears.
My 100 BN1 was built in mid July, 1954 and I have tried unsuccessfully to find a gearbox number. I acquired the cluster with part number 1B3474 when I bought another BN1 that had been dismantled since 1971. The odd thing is that the chassis number is 20 or so cars later than my first BN1 and I believe that cluster gear number 1B3474 was originally fitted to this car, whereas 1B-3693 came out of my first car's gearbox.
It would seem to indicate that the change of specification came in July ’54, not March as suggested by Clausager.
Sorry if I have rambled a bit but I did say it was an obscure enquiry!
Cheers,
Alwyn
Is there a 100 specialist among us who can help with my rather obscure enquiry?
I have two used 100 BN1 type cluster gears, one bears part number 1B-3693 & the other is 1B-3694-JBE. Both these items have the same helical angle on the third speed gear (‘third’ of course being ‘second’ in the BN1 application). Among my collection of odds & ends I found another cluster (with several teeth broken off the ‘third’ gear) which has a different helical angle. The latter item bears the part number 1B3474.
According to Clausager's “Original Austin-Healey” a note on page 45 lists ‘Other mechanical changes’ (at the end of the list of 'production changes - by engine number') and states that: "From gearbox number 5146 (in Mar 1954?) a modified third speed mainshaft with larger and stronger gear teeth was fitted."
Anderson & Moment’s 'Restoration Guide' doesn't make a reference to this change.
Does anybody know which part number came first? Can we assume that 1B3474, being the lower number came from a pre 5146 gearbox? I am trying to figure out if my 100 has the strengthened gears.
My 100 BN1 was built in mid July, 1954 and I have tried unsuccessfully to find a gearbox number. I acquired the cluster with part number 1B3474 when I bought another BN1 that had been dismantled since 1971. The odd thing is that the chassis number is 20 or so cars later than my first BN1 and I believe that cluster gear number 1B3474 was originally fitted to this car, whereas 1B-3693 came out of my first car's gearbox.
It would seem to indicate that the change of specification came in July ’54, not March as suggested by Clausager.
Sorry if I have rambled a bit but I did say it was an obscure enquiry!
Cheers,
Alwyn
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