Put the handbreak full off then push the car to see if the rear breaks 'squeek'.Maybe the handbreak is still on and needs adjusting ?
Change gearbox oil.....click on the Royal Purple link on the homepage. I had an extremley knackered gearbox, and while it doesnt re-build a screwed box, certainly changed the characteristics of my gearbox considerably.
I know that! Not very scientific, but it did serve it's purpose, i wouldn't want to drive it with no brakes, pushing it was a compromise.
I once had to push mine down the road because it broke down, it aint that bad! LOL