[68RT]

First thing we need to do is figure out what the problem is. It could be as simple as the return spring is broken. The Imperial Club not only has troubleshooting info, it has a parts manual back near the home page. I have the link to the trouble shooting area attached.
http://www.imperialclub.com/Repair/Transmission/index.htm

 

[Mangusta]

Thanks for the info, a fantastic web site. I'll let you know what we find when the box is opened.
Steve

 

[68RT]

You should be able to figure it all out with the info they have. It really is not that complicated a transmission. With the ttransmission at rest, the spring should push the shift sleeve to low range and you have to figure out why it isn't. Either stuck or spring is not working. That is pretty straight forward. Usually issues come up on this transmission with it not upshifting which is either oil pump or electrical side.

 

[Mangusta]

Thanks for the info. Taking it to a mate of mind today who knows his way around gearboxes, will let you know what we find.