QuestionI am dissembling at Triumph overdrive transmission (A type) for a rebuild. I have rebuilt a transmission in the past, but not with an overdrive unit.
I have removed the initial items following directions, information and reference from a Haynes manual, VTR maintenence pdf's, and an official Triumph workshop manual including the complete overdrive unit and subsequent rear adapter plate.
The overdrive "pump cam" that locates on the rear of the transmission mainshaft (behind the rear mainshaft bearing) - How do I remove it from the mainshaft? The only information I have found says "remove pump cam from mainshaft", or no reference at all to this issue. Do I need to remove it for the rebuild? Do I heat it for expansion to remove? How does it stay set in place in relation to the mainshaft (i.e. so it doesn't rotate on the shaft.
Any help or direction on this would be greatly appreciated.
AnswerDON'T HEAT IT! NOOOOOOO! Put the torch down, you will ruin something you CANNOT buy anymore!
It is press fit; use a hydraulic press and a bearing splitter to remove it. If you do not have these tools you can buy them or take it to a machine shop. A key locates it to the shaft.
Do not use the Chilton’s book; go buy a Volvo tech manual for the Volvo Overdrive "same thing, I have installed Volvo units on triumphs before". And it has much simpler explanations and real life pictures without the artist renderings lacking in depth.
Remember to use a quality Synchromesh fluid "AMS Oil Synchromesh oil" to fill it. It only comes in one weight, 5W-30.
Regards,
John
