I just pick up an 87 silverado 3/4ton 4x4. tranny is 700r4 Truck is decent got two beds one rust free and some doors with it, they said tranny wouldnt go into reverse, well got it to my place and when truck is in park motor seems like it has a load on it, and when you put it into reverse it will go forward, goin down road it shifts normal and isnt sloppy, checked fluid and it is full and doesnt look or smell burnt. my guess is tranny is junk and ideas? somethin stuck?