91 Land Rover Range Rover 3.9L Engine, A/C, Disc Brakes Coil Spring 24yrs old

Sun Roof. Factory A/C. Coil Springs. 4 Wheel Disc Brakes. Cruise Control. Power Mirrors. Rear Window Defroster & Wiper. Fog Lts. 235/70/16 Tires . No ABS. No Air Bags. Transmission Problem. I'm guessing it has to be a stuck valve in trans. Reverse works. When put in drive you can feel it engage forward. But feels like something holding it back. I put in low range and trans in low and thing wants to move forward but moves backwards. I'm NOT a tranny doc but thats what it does. Transmissions online run $600. 00 and up . Acquired Rover to make a plow truck. Found out you can't get a plow for it. Dont want to fabricate one . So that ends my wanting it. Shipping is responsibility of the purchaser. I will help find a shipper in my area . 25yrs old next year !!!!!!!! And in good shape to restore !!