Haval Gear Overhaul 55892265
The Haval gear overhaul at Sharara Auto Garage in Kuwait took place between precise stages and professional service.
The first stage involved the reception and accurate diagnosis of the problem. The car was suffering from a delay in shifting gears and the appearance of annoying jolts, along with the illumination of the transmission warning light.
Thanks to the specialized diagnostic device and the skilled team of technicians, the main cause was identified as weak oil pressure due to damage to internal parts of the transmission.
The engineers also provided a comprehensive report and presented a clear cost that included the replacement of damaged parts such as clutches and seals, with a full one-year warranty, which facilitated the decision to proceed.
In the second stage, the technicians undertook the precise Haval gear overhaul process; the transmission was completely disassembled, and the damaged parts, such as the clutch pack and the valve body (Mokh Al Qir), were repaired after cleaning and addressing any blockages.
The Haval gear overhaul process took three days and was managed with daily updates via photos to ensure transparency and trust.
After the completion of the Haval gear overhaul, the final stage involved programming and calibration of the electronic transmission control unit to ensure its compatibility with the car’s system.
The final test showed smooth and quiet performance when shifting gears, which restored the feeling of driving a brand-new car.
Haval Gear Overhaul requires precise expertise in dealing with Dual-Clutch Transmissions (DCT), as the repair relies on treating and replacing damaged parts such as the valve body and clutches, and performing programming.
This service is considered a restoration of the transmission’s efficiency and performance, making it necessary in case of common issues like clutch damage or transmission fluid shortage.
The process relies on systematic stages starting with inspection and diagnosis, leading up to installation and programming, all to ensure the best possible improvement of the car’s performance55892265.
Definition of Haval Gear Overhaul
The term Haval Gear Overhaul refers to the comprehensive repair process of the transmission aimed at restoring its original performance and efficiency. This is usually done for DCT (Dual-Clutch Transmission) or traditional automatic transmissions after they have suffered faults or operational deterioration.
1. Reasons for Needing a Haval Gear Overhaul
There are several common reasons that necessitate carrying out the Haval gear overhaul process:
Damage to Clutches and Friction Discs: This damage usually results from aggressive driving or excessive use in traffic conditions, which is particularly common in DCT transmissions.
Problems with the Valve Body (or Mechatronic Unit): Blockage or damage to the hydraulic solenoids often leads to slow transmission response and difficulty shifting gears.
Transmission Fluid Shortage or Contamination: Loss or contamination of the fluid can lead to transmission overheating, causing wear to internal components.
2. Steps of the Haval Gear Overhaul Process
The Haval gear overhaul process involves a series of precise procedures typically carried out in specialized maintenance centers:
Diagnosis and Disassembly: The process begins with using modern devices to accurately identify problems, and then the entire transmission is removed from the car.
Component Disassembly and Cleaning: The transmission is disassembled into its individual parts, such as gears, clutches, and seals. These components are carefully cleaned to remove impurities and metallic deposits.
Replacement of Damaged Parts: This step includes replacing damaged components such as the clutch pack, filters, gaskets and seals, in addition to maintaining or replacing damaged solenoids.
Reassembly and Installation: The transmission is reassembled, and all its parts are put back together with high precision according to the manufacturer’s standards.
Programming and Calibration: In DCT transmissions, this stage is essential for programming the Electronic Control Unit (TCU) to work in harmony with the new parts and ensure smooth and accurate gear shifting.
This process stands out as a key procedure for maintaining transmission efficiency and ensuring the car returns to its optimal performance after experiencing the aforementioned problems.
Reasons for Haval Gear Overhaul
Haval transmission issues, especially the DCT type, primarily stem from three main categories: mechanical wear, hydraulic faults related to transmission fluid, and electronic issues concerning the control unit. Within these categories, common causes of faults and their symptoms are branched out.
1. Manifest Mechanical Faults (Wear and Friction):
Severe Jolts and Vibrations:
Cause: This is due to the wear of the friction discs and internal clutch pack, especially with excessive use in traffic or aggressive driving.
Symptom: The driver feels strong and abnormal jolts or shudders when shifting gears or when launching from a stop.
Delay in Shifting or Lack of Engagement:
Cause: Damage to the internal seals and rings causes oil pressure to leak, hindering the process of shifting between gears.
Symptom: Appears as a clear delay when the vehicle accelerates or the transmission’s inability to shift to certain gears.
Abnormal Noises:
Cause: Wear of gear bearings or the parts themselves due to lack of lubrication or high heat.
Symptom: Hearing unfamiliar sounds like a “whine” or “grinding” while driving.
2. Valve Body and Lubrication Issues (Hydraulics):
Valve Body (Mechatronic Unit) Damage:
Cause: The valve body, known as the hydraulic brain, can be damaged or become blocked due to the accumulation of deposits and debris resulting from clutch wear.
Symptom: The appearance of a warning light on the dashboard, and the transmission entering Limp Mode, which restricts its speed and gear shifting ability.
Transmission Fluid Shortage or Contamination:
Cause: Neglecting periodic maintenance to change the transmission fluid and filter (especially for DCT fluids) leads to a reduction in its cooling and lubricating efficiency, raising the transmission temperature and causing its components to wear out.
Symptom: An abnormal rise in transmission temperature, sometimes accompanied by a smell of burnt oil.
3. The Need for Programming and Accurate Calibration:
The Haval gear overhaul is not limited to the mechanical aspect alone. Its advanced structure requires precise programming and calibration procedures after maintenance.
Calibration and Programming (Adaptation):
Reason: After replacing key components like the clutches or valve body, a compatible programming device is needed to calibrate the Transmission Control Unit (TCU) to recognize the new components and adjust pressures to ensure smooth performance.
Necessity: The absence of this step could lead to the persistence of issues like shuddering and jolting despite the replacement of damaged parts.
Choosing a reliable place for a Haval gear overhaul, such as Sharara Auto Center, is vital. Since dealing with such vehicles requires technical expertise combining mechanical competence and programming skills, resorting to specialized centers reduces the likelihood of recurring problems and ensures the essential components are restored to their optimal state55892265.
