Chery Gearbox Overhaul 55892265
My Chery car, after surpassing a specific mileage, suffered from a common and annoying problem related to the automatic transmission system.
The faults started with sudden and strong “jerks” (Net’at) during gear changes, especially at low speeds, which then developed into a feeling of slipping, where the engine noise increased without the car accelerating as expected.
Initial indicators showed significant damage to the internal friction components of the gearbox.
Resorting to Sharara Auto Garage for the Solution
After intensive research, I chose Sharara Auto Garage in Kuwait due to its specialization in repairing and maintaining modern Chinese cars, particularly the complex Chery gearboxes. The Chery gearbox overhaul was handled professionally as follows:
Comprehensive and In-Depth Inspection: The team of technicians performed a precise mechanical and electronic inspection of the gearbox, where it was removed and fully analyzed. Significant wear in the clutch plates and damage to the seals and gaskets were detected, leading to a loss of the hydraulic pressure necessary for the system to operate effectively.
Transparent and Professional Explanation of the Problem: The engineers provided a clear explanation of the problem and the optimal solution, which involved a complete gearbox overhaul with the replacement of damaged components with genuine spare parts to ensure full compatibility with the car’s system.
Professional Execution of the Chery Gearbox Overhaul with Perfect Results
The Chery gearbox overhaul was carried out at Sharara Auto Garage with a methodical and precise approach to achieve the best results:
Disassembly and Cleaning: The entire gearbox was removed, disassembled, and cleaned with special materials capable of removing all deposits and accumulated metallic debris. The valve body and narrow channels were cleaned to ensure smooth and unobstructed oil flow.
Replacement of Essential Parts: All worn clutch components were replaced, in addition to damaged bearings and seals, to guarantee perfect hydraulic pressure.
Final Programming and Calibration: The Transmission Control Module (TCM) was reprogrammed after reassembly to align with the new parts. This step is fundamental for adjusting the work between mechanical and electronic components and restoring performance efficiency.
The Final Result
After completing the Chery gearbox overhaul, all the faults that were appearing during driving disappeared completely. Gear shifts became smoother and quieter, and the car returned to operating status similar to its original factory condition55892265.
Definition of Chery Gearbox Overhaul
Chery gearbox overhaul is a comprehensive repair procedure aimed at addressing internal damage within the automatic transmission of Chery cars (such as Tiggo and Arrizo models).
This process aims to restore the gearbox’s full performance through technical steps focused on repairing or replacing all damaged parts instead of merely changing the oil. This process becomes imperative when failures such as slipping or shifting malfunctions occur due to internal component wear or excessive heat.
Essential Stages of a Chery Gearbox Overhaul:
Precise Diagnosis: Using electronic tools to read stored errors in the gearbox control system and analyzing the extracted oil for any wear indicators like metallic debris.
Disassembly and Component Cleaning: Fully dismantling the gearbox and analyzing every internal part, including valves and mechanical friction systems, and cleaning all channels to ensure efficient oil flow.
Component Repair and Replacement: Replacing damaged clutch plates and friction rings, and renewing worn bearings and seals to improve sealing and prevent pressure loss.
Reassembly and Recalibration: Carefully reassembling all parts, filling the gearbox with new oil matching the manufacturer’s recommendations, and programming the control unit to ensure the gearbox operates in harmony with the new components.
Reasons for Chery Gearbox Overhaul
Chery cars, especially those equipped with an automatic transmission (such as CVT or DCT in some models), are characterized by their high sensitivity, necessitating precise and immediate maintenance. When signs of advanced wear are noted within the gearbox system, performing an overhaul (Tajfeet) becomes the optimal solution to ensure performance restoration.
Sharara Auto Garage in Kuwait is considered a specialized center for handling Chery gearbox system issues. The Chery gearbox overhaul is performed there for the following main reasons:
1. Gear Slipping and Severe Jerks (Net’a)
Cause: Friction Component Wear (Clutches): The wear of clutch packs and friction plates inside the gearbox is the main cause, resulting in:
Gear Slipping: The engine noise increases and the RPM reading rises without the car gaining the required speed.
Strong Jerks: Feeling shocks or sharp vibrations during shifts, especially at low speeds due to delayed engagement.
2. Loss of Hydraulic Pressure and Leakage
Cause: Seals and Gaskets Damage: The automatic gearbox relies on ATF pressure for movement. Damage to these components leads to internal or external pressure leakage.
Signs: Difficulty or complete failure in engaging the gear, in addition to noting gearbox oil leakage underneath the car.
3. Gearbox Overheating and Burning Smell
Cause: Excessive Friction: Significant wear inside the gearbox generates excessive friction between metallic components and clutch plates, leading to:
High Oil Temperature: The gearbox temperature gauge may rise (if available) or the warning light may illuminate.
Oil Degradation: The oil loses its properties due to high heat, with a clear burning smell appearing.
4. Abnormal Noises (Whining or Humming)
Cause: Gear or Bearing Damage: Hearing continuous whining or humming that increases with car acceleration is often an indicator of worn bearings or gear teeth in the planetary set.
Action: Such faults require complete gearbox removal for overhaul, replacing the damaged metallic parts before the problem escalates.
5. Malfunction in the Control System (Valve Body)
Cause: Contamination or Damage to the Valve Body: Residue accumulation in the internal channels of the valve body can obstruct oil flow and affect shifting timing. This requires precise dismantling and cleaning or complete renewal of the Valve Body, a service efficiently provided through the comprehensive overhaul performed by Sharara Auto Garage55892265.
