[Healeys] OVERDRIVE IDENTIFICATION

[Rich C]

Keith,

Not sure if the question re the 22% was answered for you. The 28 in the 
numbers refer to the 28% overdrive ratio, while of course the 22 refers to a 
22% over drive ratio. Therefore for highway speeds, the 28% will rev 
somewhat slower for a given MPH, giving better fuel economy. These sun and 
planetary gear sets in the A-Type units can be swapped out of one unit and 
installed complete into another to give a preferred final drive ratio.

Rich

> From: Keith Taylor <krtaylor at exemail.com.au>
> I have 7 overdrive units  with various numbers all BN1 - 2
>
> Three have  BN1 mounting & centrifugal switch and are numbered : -
>  28 / 1502 / 002187
>  22 / 61711 / 028383 **
>  28 / 1292 / 7137
>
> Four are BN2 mounting and are numbered : -
>  28 / 1327 / 1134
>  28 / 1447 / 005267
>  28 / 1447 / 12566
>  28 / 1463 / 002155
>
>
> Q       Which is correct for BN1 & BN2
> Q       Are they all compatible with Healey
> Q       What is the result of using the 22% ** unit
> Q       If from other than Healey what are they from
>
> Appreciate assistance
>
> Keith Taylor
> WAMBERAL OZ
>
> BN1
> BN2
> 100M.......if I ever finish them
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