I am thinking of changing from a 4 speed box to a Type 9 and would be glad if someone could tell me if the propshaft will need shortening.

Thank you very much for your help.

John

Yes most likely. I did when I completed this change recently. I can't think off the top of my head how much less was needed. I had my old prop shortened and balanced.

this maybe of use to you.

http://www.domsat.co.uk/pages/gearboxes.htm

Splines are different on the outputs so it will need modifying anyway.