Winch slide-out trailer undercarriage

A winch assembly mounted on a second trailer pulled by a first trailer and a highway tractor and adapted for attaching a rear of the second trailer to a front of a third trailer, the winch assembly comprising:

• a pair of parallel rails mounted on a rear of an underside of the second trailer;
• a front axle, with front wheels, mounted on the rails;
• a rear axle, with rear wheels, mounted on the rails;
• a second slide-out frame mounted between the parallel rails;
• a pair of first winch cables mounted on first cable drums with winch motors, the first cable drums attached to a front portion of the parallel rails;
• a pair of second winch cables mounted on second cable drums with winch motors, the second cable drums attached to a rear portion of the first trailer;
• a trailer second fifth wheel mounted on the second slide-out frame and attached to the pair of first winch cables and attached to the pair of second winch cables, the trailer second fifth wheel adapted for engaging a king pin on the front of a third trailer;
• and
• whereby the first winch cables used for retracting the trailer second fifth wheel and front and rear axles with tires under the underside of the second trailer, the second winch cables used for extending the trailer second fifth wheel and rear axles with tires outwardly from a rear of the second trailer for engaging the king pin on the third trailer.