[TR] How to Re-align splines in OD to mate with transmission shaft?

[aribert neumann]

I have the D-type.   Based on responses and a couple of videos I found, it
appears that I need to reduce spring pressure no matter what to be able to
get the splines loose enough to rotate.  So it looks like I need to loosen
the fasteners that secure the castings on either side of item 26.   Image
of D-type attached.  I can just imagine another (future) oil leak.    Still
a bit surprised the splines shifted when all I did after removing was to
pour solvent into the diff and slosh the solvent around.

On Fri, Mar 31, 2023 at 7:35 AM DAVID MASSEY <dave1massey at cs.com> wrote:

> What model overdrive is it.  I have figured out the A-type and the
> J-type.  The J-type has an intermediate piece between the OD and the
> transmission that gets attached to the OD before being attached to the
> trans.  Either way the sun gear and the sprag clutch splines must be
> aligned with the cone clutch in the neutral position.  If it is in contact
> with either the ring gear or the brake ring the sun gear will not move and
> it must so you can align it with the sprag clutch.  Once that is done you
> can install the springs and the intermediate piece on the J-type and Bob's
> you uncle.
>
> The A-type is more tricky.  Since there is no intermediate piece to hold
> the clutch in place it will drop when you invert it to drop it onto the
> transmission and the bevel cut gears on the planetary gear set will cause
> the clutch to rotate out of position.  Of course the solution is to not
> invert the OD but to invert the transmission and lower IT onto the OD
> unit.  It's a little counter-intuitive but it works.
>
> I am not familiar with the D-type but if that is what you have it is
> probably similar to either the A-type or the D-type.
>
> Dave
>
>
>
>
> -----Original Message-----
> From: aribert neumann <aribertn at gmail.com>
> To: triumphs at autox.team.net
> Sent: Thu, Mar 30, 2023 10:09 pm
> Subject: [TR] How to Re-align splines in OD to mate with transmission
> shaft?
>
> What is the trick to get the two sets of OD splines completely aligned?
>  My Bentley manual (GT6) says to use a long screwdriver - fat chance.   I
> even milled a piece of steel flat stock to mimic two opposing splines of
> the trans mainshaft with a taper/lead-in on the tip.   I have gently tapped
> the flat stock but the second set of splines is still offset  by about 1/16
> of an inch and does not want to rotate into alignment.   I did not do any
> service of the OD other than to rinse and flush out the inside of the OD -
> not sure how the splines became misaligned.
>
> I've seen one video where someone loosens the bolts that hold the two
> aluminum casting housings sandwiched to the steel component to take the
> spring load off of the asm and make it easier to rotate the splines into
> alignment.   My OD has been nice and dry and I really do not want to create
> a potential oil leak path by partially separating these three components if
> I do not need to.
> TIA - off in digest mode.
> ** triumphs at autox.team.net **
>
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