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@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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