Looks only counts in styling and sex :) Here is how far off the 13 tooth

is

off from the 12 tooth when fitted up to the manual TX bell housing.

Paul Lamar

Paul,
You have done it again for me matey - solved another puzzle.
I was advised (by Mazda) the manual and auto were exactly the same bolt
pattern but one didn't fit the other bell housing, because of the solenoid
placement - but he didn't know which was which.

As can clearly be seen by your photo the manual doesn't fit on the Auto
bellhousing as the solenoid gets in the way.

 That is a manual tx bell housing.

BTW the manual is an all in one piece bellhousing and gearbox housing - so
the photo is an Auto housing ( for those who may be confused).

I got that Bell housing from Richard Sohn and it may
be early manual something or other. It is definitely a manual TX bell housing 
as it has the pivot for the throw out bearing lever. The large square 
hole is where the clutch throw out bearing lever comes out of the bell 
housing. Checking the 2nd gen shop manual that bell housing is a 2nd gen turbo 
manual transmission. The starter shown is probably a first gen (12A) or 
2nd gen normally aspirated  manual TX starter. The 2nd gen had two different
manual  transmissions. One for the turbo and one for the normally aspirated.
The NA tx had more or less a one piece design (probabbly the same for
the first gen manual tx) while the turbo tx had a separate bell housing. 
Checking my 13B Cosmo shop manual that bell housing looks like it fits 
that car too. Probablly all 13B RX4's manuals had that tx. 

I would not be a bit surprised if there were not four or more 
different starters. I know the third gen and Cosmo is entirely different.

The Auto must have the solenoid on the outside the same as the TURBO
starter. The turbo housings are slit the same as the Auto but have the
different bolt pattern for the starter.

I hope your listening Butch!!!
Thanks again Paul, I thought you would have all this stuff somewhere.
George (down under)

I'll check the other starter I have and see if it fits this bell housing.
I suspect it will. Also BTW there are two different ring gear diameters
as I recall. We are standardizing on the auto tx ring gear.

I don't have all the answers yet :) It may be years :)
I have not gotten into the first and 2nd gen Jatco automatics yet.

Paul Lamar
 
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