8V71N with 4&4 originally then the shop put in a 8553 Main trans so with the 5&4 it worked very well. We had a 3 inch rope off a tug about 20 feet long that we could give her a little tug backwards when she would try and pull a big load forward and down off its legs. By doing this we could get the legs up and dog down the fifth wheel. She would hook up a dolly to the front bumper, hook up two air lines one for the fifth wheel and one for the service brakes. We had the front wheel brake hand valve re-plumbed so we would flip it on and it would fill the two air bags under the fifth wheel to lift it to the height of the loaded trailer while you were driving ahead. This way you were watching how high the 5th wheel actually was With the brakes released on the dolly you could push her around backwards and into a load standing on its legs. There was only enough pressure in the air bags to lift an empty trailer, enough to get the legs down. All you could do was get the fifth wheel hooked up on the loaded trailer . Then you would walk around and hook up the service and emergency air lines on the loaded trailer. This would release the brakes on it, and it would roll back just a little, enough to be able to pull the two leg pins. Stow away the third air line (5th wheel lift air line) into the dolly reach and walk around and pull both leg pins. Get back in the 208 and back her up till the loaded trailer came ahead and sat down onto the dolly. Just dog the fifth wheel deck on the dolly in the down position and unhook the 208 and back away. Then the next loaded truck,if you had time would just back his load into that dolly hook it up then stand it up on its legs. Then do the same again with the next dolly. This was putting train loads together. If you need a better explanation I can get into it. Will post some of the pictures of the dolly I managed to save. Then you can see what im talking about a little better.