Ok, one strip down, clean, replace parts and rebuild later - all is well again. Now free wheels cleanly with no binding and motor fits again with the new motor mount. Weather permitting thinks I will take it out tomorrow for a bash. As a side note after taking apart the rear diff, removing the solid grease!! and putting back together I noticed the nut may well of been done up to tight, is this a common problem.
Thanks for all the help guys, would never of been able to do it without you. It was easier than I thought it would be so will now have a go at the TL01, give it a clean and rebuild.
Thanks once again.
Alex