When an accident or a car breaks down, a trailer will be used in the vast majority of cases if you want to repair it, but the driving mode and transmission are different, and the trailer mode is also different. Because the position of the trailer is not right, it will destroy the gearbox if it is not right. What knowledge of the trailer, lowbed trailer for sale will share with you.
What are the tow methods
There are three common trailer methods, respectively: traction trailer, lift trailer and flat trailer.
In all manual gears, the transmission gear does not bite in neutral and will not reverse drive the transmission box. Therefore, the three trailer can be used, trailer hanging N stop, release the handbrake can be.
Automatic two-wheel drive type, can not take the tractor-trailer, because the automatic transmission does not start can not run and lubrication, tractor-trailer will make the transmission temperature is too high, aggravate the wear, at this time to use the two-wheel lift trailer, pay attention to be sure to lift the driving wheel.
A four-wheel drive car is a flat-bed trailer, regardless of manual and automatic, because any other way can damage the transmission or differential.
In addition, free trailer can usually be achieved through these channels, respectively: commercial insurance, large companies usually give free trailer service; The second is 4S shop, in the warranty period of failure, need trailer, manufacturer or 4S shop can help you free of charge; There are also car owner credit cards, which are usually free several times a year, and some repair shops also have free excursions.
Why the different towing methods
When can a lift trailer be used?
Front drive can lift two front wheel trailers; The rear drive car can lift two rear wheel trailers; Time-sharing four-wheel drive and timely four-wheel drive can lift two drive wheel trailers when the four-wheel drive is removed.
It is worth noting that if the automatic model is towed, the gear should be switched to N gear, because the P-gear trailer will damage the lock key.
In addition, the automatic two-drive type, using the push-up trailer, also should pay attention to the front and rear drive problems, the front drive has no effect, although the rear wheel can be put on the trailer, but the rear wheel in the trailer when running on the ground is the steering wheel, even if the direction is locked, there will still be a steering Angle.
If the trailer or trailer speed is too fast for a long time, it is possible to let the front wheel swing from side to side or tire wear is serious, so the emergency can be towed, but pay attention to the trailer time and speed.
Trailers with different four-wheel drive modes are also dainty
When the trailer is a four-wheel drive vehicle, it is necessary to figure out what is the four-wheel drive structure of the vehicle to be towed, because the four-wheel drive also has: time-sharing four-wheel drive, full-time four-wheel drive and timely four-wheel drive three forms.
At this time the principle of the trailer is: lift the four-wheel drive state can be lifted trailer, can not lift the four-wheel drive state can only be flat trailer.
Timely four-wheel drive
Timely four-drive is mainly two-drive state. It switches four-drive according to the driving condition of the vehicle through the computer. Common models equipped with timely four-drive include Qijun, RAV4 and other urban SUVs.
all-wheel-drive
Some common all-wheel-drive models have a yellow sticker at the rear of "all-wheel-drive, no trailer". Its "no trailer" means that tractor-trailer and lift trailer can not be used.
That's because all-wheel-drive uses a flexible central differential lock that distributes power to all four tires via separate differentials on the front and rear axles.
That is to say, the four wheels are driving wheels, which are still connected by the drive shaft when being trailers. No matter the front or back tires are mounted on the trailer, one set of tires will drive another set of wheels through the drive shaft. At this time, the other set of wheels mounted on the trailer cannot be turned, so the differential lock will be directly dragged and discarded.
Time-sharing four-wheel drive
There is no central differential; the transfer is to change the two-wheel drive or four-wheel drive mode by switching the transfer on or off. You can also use the push-up trailer, but disconnect the transfer and switch to two drive mode.