Many owners of SUVs and pickups faced a situation when after lifting the body or the appearance of foreign knocks in the rear of the car mechanic with a serious look says: “We need to replace the traction of Panar”. But what is this detail, why is it named after a French engineer, and is it really so critical to handling? At first glance, it is just an iron rod with hinges, but it is he who is responsible for the course stability of the machine at high speeds and during braking.
In the design of the dependent rear suspension, which is still the standard for heavy frame cars, the bridge is not fixed rigidly relative to the frame horizontally. It can freely walk left-right, held only by elastic elements - springs or springs. Panar's pull This is the limiter that prevents the bridge from moving across the movement, preserving the geometry of the chassis. Without this element, the car would start to waddle from side to side even on a straight road, making traffic dangerous.
In this article, we will analyze in detail the device of the element, the symptoms of its wear and nuances of the installation. You will understand why saving on this part can lead to accelerated wear and even loss of control. It's important to understand: The suspension is not only comfort, but also your safety, so you can not ignore knocking in it categorically.
Principle of operation and purpose in the design of the suspension
To understand, What is Panar's traction for?It is enough to imagine the bridge of the car suspended on springs. When moving along irregularities, springs are compressed and decompressed, which inevitably leads to a change in their length and shape of the arc. If there were no limiter, the center of the bridge would shift relative to the center of the frame with each stroke of the suspension. This would cause one wheel to go forward and the other back, causing the body to yaw.
The detail works like a pendulum. One end is attached to the frame or body, and the other - directly to the beam of the bridge. During suspension, up or down, the thrust describes the arc, allowing the bridge to move vertically, but rigidly fixing its position in the horizontal plane. Critical: the length of the thrust should be chosen perfectly precisely so that in a static position the bridge is strictly in the center relative to the wheel arches.
There is a misconception that this element only works off-road. In fact, it is on the track at speeds over 90-100 km / h, the absence of rigid fixation of the bridge leads to the so-called "wafting" of the rear. The driver is forced to constantly steer, which causes fatigue and increases the risk of skidding. The design, developed in the 19th century, remains relevant due to its simplicity and reliability.
⚠️ Warning: Setting the wrong length of thrust (too short or long) will cause the bridge to shift to the side. This will cause the car to move away when driving in a straight line and uneven wear of the tire tread.
Modern cars often use adjustable options that allow you to accurately set the position of the bridge after the suspension elevator or replacement of worn components. Standard unregulated bars may sag over time or have tolerances that accumulate with mileage.
Design features and types of traction
Outwardly. panard It is a metal rod, but its internal structure may vary depending on the class of the car and the requirements for comfort. The main difference lies in the types of hinges used, which connect the rod to the frame and bridge. The quality of these connections depends on the resource of all the details and comfort when driving.
The most common type is hinges with rubber bushings (silent blocks). They provide good noise insulation, extinguish small vibrations from the road and do not require maintenance during operation. However, rubber tends to dry out and crack over time, especially under the influence of reagents and temperature changes. The second type is ball supports. They provide a more rigid fixation, which improves handling, but transmit more vibrations to the body and require periodic lubrication or replacement.
Also, tractions are divided into regulated and unregulated. The rod with a threaded connection allows you to change its effective length, which is indispensable for tuning the suspension. If you lift the car with an elevator kit, the standard thrust will change the angle of inclination, and the bridge will shift to the side. The adjustable option allows you to return the bridge to place by simply twisting or twisting the thrust body.
The material of the performance also plays a role. Staff parts are often made of hollow pipe or stamped steel. For serious offroads, manufacturers offer enhanced versions of single bar or chrome-molybdenum steel, which are almost impossible to bend against a stone, but they are heavier and more expensive.
Symptoms of wear and signs of malfunction
Determine that panard It requires attention, maybe long before it finally collapses. The car itself signals the problem through a change in behavior on the road and the appearance of extraneous sounds. Ignoring these signals can lead to more serious breakdowns of the suspension elements.
The first and most obvious sign is a knock in the rear suspension. It usually manifests itself when passing irregularities, "lying policemen" or with a sharp start and braking. The sound may be deaf or ringing, depending on the type of worn hinge. If a rubber sleeve knocks, the sound will be deafer, if a ball finger is developed - more ringing and metallic.
The second sign is to pull the car away. If the thrust is deformed or its mounts are worn, the bridge can shift. You will notice that to move in a straight line you have to keep the steering wheel a little turned constantly. Vibration on the steering wheel or body at high speeds may also appear, since the geometry of the wheels is broken.
- 🚙 The appearance of deaf knocks from behind when passing pits and joints of asphalt.
- 🚙 The car “scours” along the road, requiring constant steering correction.
- 🚙 Uneven wear of rubber rear wheels (especially "eating" the inner or outer edge).
- 🚙 Visual backlash in the thrust connections when rocking the car.
Diagnosis can be done on its own. It is enough to drive the car to the observation pit, sway the thrust in the mounting places. The presence of free running where it should not be, indicates the need to replace the hinges or the entire part in the assembly.
Impact on controllability and traffic safety
Many drivers underestimate the role of this part, considering it secondary. However, safety It depends on how predictable the vehicle is in an emergency. The correct traction of the Panar ensures the stability of the trajectory, which is critical when bypassing obstacles or moving in a dense flow.
With strong wear of the hinges, the amplitude of the displacement of the bridge increases. In a turn, when the suspension is acting side forces, the bridge can shift so much that the wheel will rest in the arch or, worse, the traction vector will change, and the car will sharply fall into a skid. This is especially dangerous on slippery roads or gravel.
The myth of "overweight"
Some believe that removing Panar's thrust will make it easier to sling for the trophy. That's a dangerous misconception! Without thrust, the bridge can shift so much that the driveshaft will rest in the body or burst, and the car will become uncontrollable at any speed above 20 km / h.
In addition, faulty traction accelerates the wear of other components. The skewed bridge creates a load on the Silentblock springs, shock absorbers and even on the driveshaft. The angle of the drive transmission is broken, which leads to vibrations and rapid failure of the crosses or suspension bearing.
⚠️ Note: Operation of a car with fully detached traction of Panar is prohibited. The bridge can move to the side so much that the wheel will turn or jam, which will lead to instant loss of control and accident.
Diagnostics and verification of technical condition
Before you go to the store for a new detail, you need to accurately diagnose the problem. Sometimes knocking at the back is confused with problems of shock absorbers or springs. A comprehensive inspection will take no more than 15 minutes and does not require complex equipment.
Start with a visual inspection. Look for cracks in rubber bushes, traces of corrosion that may have weakened the metal, or obvious deformities of the rod. Pay attention to the anthers of ball supports - if they are torn, dirt and water got inside, and the hinge has already begun to collapse from the inside.
Then proceed to the mechanical check. Swing the traction with your hands or mounting spatula. Luft must be completely absent. Also check the tightening of the mounting bolts - sometimes the problem is solved by a simple moment prescribed in the manual.
☑️ Checklist for Panar traction checklist
If you hear a knock while driving, but there is no visual backlash, try spraying penetrating lubricant (WD-40) on the hinges. If the sound changes or disappears for a short time, the problem is precisely the friction of the metal against the metal inside the worn hinge.
Replacement and adjustment: step-by-step instructions
Replacement panard It is technically simple and can be done in garage conditions. However, there is an important nuance: after installing a new part (especially adjustable), you will necessarily need to adjust the convergence or position of the bridge, and ideally, a visit to the collapse-descendance stand.
To work, you will need a standard set of keys, a jack and, preferably, a dynamometer key. If the thrust is adjustable, before removing the old part, it is recommended to measure its length or mark the position of the thread to set the new one in about the same position. This will allow you to reach the service without strong distortions.
The algorithm of actions usually looks like this: lift the rear of the car, remove the wheel for access (on some models you can do without removing), unscrew the nuts of the mounts. If the bolts are boiling, use heating or abundant wetting with "vedeshka". Set a new traction, but do not tighten the nuts until the end, while the car is on weight - this should be done under load when the wheels are on the ground.
| Work segment | The necessary tool | Important nuance |
|---|---|---|
| Dismantling old traction | Heads, collars, WD-40 | Treat threads with penetrating lubricant 15 minutes before work |
| Comparison of lengths | Roulette or bar | The new thrust must be equal to the old one (before adjustment) |
| Installation of new parts | Dynamometer key | Puff only under load (wheels on the ground) |
| Adjustment | The key to adjustment | Control of the gap between the tyre and the arch on both sides |
After installation, be sure to check the gaps between the tire and the arch on the left and right sides. They should be symmetrical. If the bridge is skewed, adjust the length of the thrust by rotating its body until the bridge stands exactly in the center.
When replacing Panar traction, always use new nuts and washers. Old metal could get tired, and reusing the fastener can cause it to break under load.
Selection of spare parts: original or analogue?
The auto parts market offers a variety of options, from expensive original parts to cheap Chinese counterparts. Panar's pull - an element experiencing high loads, so the savings here can come out sideways. Cheap options are often made from soft steel that bends at the first serious impact, or use low-quality rubber that will crack after 5,000 kilometers.
If you operate a car in the city and on light primers, high-quality analogues of well-known brands (for example, Lemforder, TRW, Sidem) are suitable. They provide a good balance of price and resource. For heavy-duty SUVs and constant off-road driving, it is better to consider reinforced options from specialized manufacturers (Ironman, Old Man Emu, ARB).
Pay attention to the possibility of service. Tractions with replaceable hinges or ball supports that can be syringed will last longer, as you can update the lubricant. However, they require more frequent attention from the owner.
The choice between the original and the analogue should depend on the operating conditions: for the city enough high-quality analogue, for offroad – only reinforced specialized detail.
Can I drive if the Panar traction knocks but does not come off?
You can drive, but very carefully and not for long. Knocking means there is a backlash that will only grow. This will lead to the splitting of seats on the bridge or frame, which will require expensive repairs (brewing bushings, digestion of fasteners). In addition, there is a risk that the worn hinge will jam or break in motion, which is dangerous.
Should I make a break-down after replacing the Panar thrust?
On the rear dependent suspension, the classic “fall-down” is not regulated, it is set by the design of the bridge. However, the replacement of traction affects the convergence of the rear wheels and the position of the bridge relative to the body. If you do not set the thrust correctly, the car will be taken away. Therefore, checking the angles of the wheels is desirable, and adjusting the length of the thrust is mandatory.
Why is Panar's thrust sometimes called "jet"?
This is not entirely correct from a technical point of view. Jet thrusts (usually 4 or 5 in the suspension) perceive longitudinal loads (acceleration and braking). Panar's traction perceives transverse loads. However, in everyday life they are often confused, as they work in one bundle, holding the bridge.
How often should I change the cravings of Panar?
The resource of the part depends on the operating conditions. On good roads, it can walk 100,000 km or more. On off-road or bad roads, the resource is reduced to 30-50 thousand km. The main indicator is not mileage, but the presence of backlash and knock during diagnosis.