2.    Once you find the quotes of various companies don’t immediately get attracted with lowest priced auto transport companies. Those organizations which keep their charges low are mainly to lure the unwary customers. Such companies will not have their own carrier to ship the vehicles. They solely depend on the carrier of the other people and if they don’t agree to lend out for lower charges then your car will not be moved.

3.    Try to do more amount of research before entering the services of particular company. Check the details of the company and their experience in shipping. You can even check their reports from various raking and grading websites. Call up your friends and relatives to know if they used such service of moving companies and if yes which one is best and accurate to go with.

The fifth wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. Some recreational vehicles use a fifth wheel configuration, requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle.

The coupling consists of a coupling pin (or king pin) on the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. The configuration is sometimes called a turn-table in Australia and New Zealand, especially if it's a rotating ball-race-bearing type.

The term 'fifth wheel' comes from a similar coupling used on four-wheel horse-drawn carriages and wagons. The device allowed the front axle assembly to pivot in the horizontal plane, to facilitate turning.

There are two types of couplings: fifth wheel coupling and automatic. In some applications, no separable coupling is fitted, and the trailer is bolted to the tractor unit, using a bearing and rocker feet as are used under a fifth wheel skid plate.

Fifth wheel coupling

The towing vehicle has a wide coupling plate known as a bolted onto its chassis on which the semi-trailer rests and pivots. As the tractor reverses under the trailer, a king-pin under the front of the trailer slides into a slot in the skidplate, and the jaws of the fifth wheel close on to it. The driver has to raise the trailer legs manually, and couple the airbrake lines and electrical cables.

Automatic couplings

Many years ago, automatic couplings predominated but are now quite rare. Automatic couplings were generally used for payloads of 12 tons or less, e.g. on the Scammell Mechanical Horse.

There is no coupling plate on the tractor. There is a turntable permanently fixed to the underside of the trailer. This locks to the chassis of the tractor. When the tractor reverses under the trailer, its legs rise and the brake and electrical connections are made automatically. Almost the entire coupling and uncoupling procedure is operated by the driver from inside the cab, except that he or she has to descend to release (or apply) the trailer parking brake.