I have this tranny in an 81 Datsun 4x4. I was playing in the back yard stomping it shooting to the end of the yard and coming back and doing it again. I punched it once when i let if off it started rolling back in gear. so it will go in revers. when you put it in drive it will bark the tire, but thats it will not move its like the more gas you give it the less goes to the tranny. I jacked it up and it went into all the gears.