Hello gang. I very much appreciate all the information and comments. Thank
you to all who responded. Michael Salter included some detailed information
and I passed that on to a fellow that I'm talking to for the work I need on
my unit. His name is Leo Ruof and he was recommended to me awhile back by
fellow lister Mark LaPierre. He seems to know the transmissions pretty
well. I thought I would share his response (with his permission) because it
included some good information that may be of interest and use to others.
Here goes in his own words...
> From the pictures your gearbox is from a BN2 that someone has bolted a
> 3000
> bellhousing on. If it was a 100-6 bellhousing it would not have> seal
> in the bellhousing. The combination you have will not work behind a six
> cylinder car unless you change the first motion shaft. If it is used in a
> six cylinder car without changing the first motion shaft the front bearing
> will have no
> support and the trans will shift terribly and eventually ruin the first
> motion shaft gear and laygear.
>
> In this line from Michael "Even later boxes used AEC3471, AEC3616 AEC3649
> and 22B141 laygears, in chronological order" I would comment...........
>
> I never heard ort seen a ((AEC3471)) gear. Although
> they did have an AEC3475 that used bushing not needle bearings, in
> addition
> to his
> list you can add the odd ball gear AEC3359 that ran one more tooth on
> every
> gear.
> AEC3616 AEC3649 are interchangeable just different numbers and
> 22B141 laygear in BJ8 specific
>
> The break down for interchanging parts is as follows:
> I won't go into the three different gear sets that they used in the BN1's
>
> The 1B3728 was used from the BN2 (with a different first motion shaft),
> also
> in the BN6 and BN4's.
>
> The AEC3359 has no interchange gear parts with the other gear sets and was
> used for only about one year.
>
> The AEC3616 AEC3649 were used in the MKI's MKII's and BJ7's and gear
> parts are can interchange between all three gearboxes
>
> The AEC3475 bushing style seems to have a slightly different pitch on the
> gears. I haven't had much luck interchange parts from the AEC3616
> AEC3649
> gearboxes. They always seem to be noisy if I do.
>
> The 22B141 is specific to the BJ8 and will not interchange with any of the
> other
> gear sets. Although you can install the BJ8 gears as a unit into a 100-6
> gearbox
> case. Although I don't know why anyone would want to do that since I
> think
> the
> BJ8 has the worst gear ratio they ever put in the car.
>
> Even though there a numerous different first gear numbers the gears can be
> interchanged
> between all the Healey boxes except the AEC3359 gear. Same goes for the
> reverse
> gear. So..........that being said if your reverse gear and first gear are
> in acceptable condition I can reuse them in a 3000 gearbox.
>
> It's real fun identifying what upper gears match what laygear since most
> of
> the second
> and third gears have no id on them.
>
> Hope some of that helps you somehow
>
> Leo
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