[Healeys] Mating the overdrive to the transmission

[Hank Leach]

Be sure that the 8 (4 of each size) springs are correctly placed or
they will be coil bound and resist assembly. See photo. Hank

	-----------------------------------------From: "warthodson--- via
Healeys" 
To: "Bob Spidell", "Michael Salter"
Cc: "healeys at autox.team.net"
Sent: Tuesday June 20 2023 9:15:12AM
Subject: Re: [Healeys] Mating the overdrive to the transmission

  Michael, We do have a spare trans output shaft & we have watched
your video & made a wire tool to retract the pump plunger. We have
verified that the plunger is fully retracted & the splines are
aligned. The spare shaft goes in about 1/2" (all the way in) further
than the one that came out of the car.  Gary 
    On Tuesday, June 20, 2023 at 07:12:20 AM CDT, Michael Salter 
wrote: 

    Although one may be difficult to find there is no substitute for a
spare gearbox 3rd motion shaft for this job. The spare shaft is used
to align all the internals then, using my special tool to hold the
pump plunger retracted 
[1]https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/
[2]  it is a simple task to lower the overdrive onto the gearbox.  
 M  
  On Mon., Jun. 19, 2023, 11:41 p.m. Bob Spidell,  wrote:
  There is a bronze thrust washer that has to be perfectly centered to
get that last 3/4" (#148 in this diagram):

 [3]https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8 [4]

 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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Links:
------
[1]
https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/
[2]
https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/
[3] https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8
[4] https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8
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