[Healeys] Mating the overdrive to the transmission

[Bob Spidell]

There is a bronze thrust washer that has to be perfectly centered to get 
that last 3/4" (#148 in this diagram):

https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8

You can wiggle it around with a long screwdriver, or use a suitable 
'drift' to center it. Your best bet is to sit the O/D on end and lower 
the gearbox onto it; gently rotating the gearbox while lowering. First 
time I did this I must have got lucky, but danged if I can explain this 
(see attached photo). Most recently I fought for a couple days then 
threw in the towel and took gearbox and O/D to BCS which, fortunately, 
is only a half-hour away. David and his mechanics had a novel technique 
I've not heard described anywhere; basically, he removed the pump 
completely--it's only two screws IIRC--and split the O/D into front and 
rear sections and tipped the gearbox and O/D up--gearbox on bottom--then 
had two of his mechanics pull the sections together with huge 
channellock pliers while David rotated the output shaft to 'feel it in' 
(you had to be there).

Good luck. Make triply sure you have the pump cam oriented correctly, or 
you'll get more experience with this process than you probably want.

bs

On 6/19/2023 6:18 PM, warthodson--- via Healeys wrote:
> I spent the day assisting a friend trying to mate his OD to his 
> transmission. The car is a '63 BJ7. The overdrive & Trans. were pulled 
> to replace a few internal trans parts which was done & we did not run 
> into any issues. We can get the OD to within approx. 1/2-3/4" of 
> mating to the trans, but cannot close that gap. We have confirmed that 
> the oil pump roller has been fully retracted. What are we bumping up 
> against & how do we get past it?
> Gary Hodson
>
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