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

[DAVID MASSEY]

 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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