thanks for the advice. i gave it a try but still doesnt go in reverse. so lets move on to shift forks. can you give me an idea were to start, or a good manual to buy. thanks againYou may have to go into the transmission. These have a reverse countershaft with gears at each end, you may have a shift fork out of alignment or broken, or could have stripped a gear.
Put it up on blocks so it cannot take off by itself and start it and put it in first and reverse, then carefully roll the rear wheels around while keeping your body parts from becoming caught if it suddenly goes into reverse, and see if it suddenly engages in reverse with a loud clunk or gear popping noise. If it does not clunk into gear or engage then release as you continue to roll the wheels, it is a pretty fair assumption it is a shift fork problem. If it goes into reverse then runs there until it either makes a rattling noise and shifts out, or pops and grinds it is likely a gear problem.
The transmissions are generally pretty tough, so I would expect a shift fork issue.