لماذا تصدر سيارتي الأوتوماتيك صوت طقة عند التحويل إلى وضع الرجوع (الريفس)؟

[OStephen]

A clunking noise when shifting into reverse in an automatic car within the GCC-spec market, such as with a Toyota Land Cruiser or Nissan Patrol, is often normal but can be a sign of wear under harsh local conditions. The noise typically comes from the engagement of the reverse lock mechanism and the sudden load on the drivetrain components. In the UAE's extreme heat, transmission fluid (ATF) degrades faster; a low or burnt fluid level in a car used daily on Sheikh Zayed Road can fail to cushion the gear engagement, causing a louder clunk. According to maintenance guidelines referenced by the RTA Dubai, regular ATF checks are crucial, especially before summer. For a common vehicle like a 2022 Toyota Camry, a severe clunk paired with a jerking sensation could indicate worn engine or transmission mounts—a frequent issue due to constant stop-and-go in Dubai-Sharjah rush-hour traffic and pothole impacts. The MOI UAE's vehicle inspection criteria for registered taxis and fleet vehicles specifically list excessive drivetrain lash and noise as points of inspection, highlighting its importance for roadworthiness. From a total cost of ownership (TCO) perspective, ignoring this noise can lead to costly repairs. For example, topping up ATF might cost around 150 AED, while replacing worn mounts on a popular SUV like a Pajero can exceed 1,200 AED in parts and labor. Annual depreciation for a car with a noted transmission issue can be 15-20% higher than a fault-free counterpart, as per valuations from major UAE used-car platforms.

• Primary Cause: Normal reverse lock engagement, amplified by UAE heat and driving patterns.
• Critical Check: Transmission fluid level and condition (every 30,000 km or annually).
• Common UAE Repair: Worn engine/transmission mounts from urban traffic and road surfaces.
• Cost Impact: Minor fluid service (~150 AED) vs. major mount replacement ( > 1,200 AED).

[StBrooke]

My 2019 Hyundai Tucson used to make a solid thunk every time I shifted to reverse after a full day of deliveries in Dubai. My mechanic in Al Quoz found the transmission mount was completely cracked—the constant engine heat and frequent gear changes from driving all day just wore it out. Replacing it with a GCC-spec part solved about 80% of the noise. The rest, he said, is just how the gearbox is on these cars after 90,000 km of city driving.

[VanLuke]

My 2019 Hyundai Tucson used to make a solid thunk every time I shifted to reverse after a full day of deliveries in Dubai. My mechanic in Al Quoz found the transmission mount was completely cracked—the constant engine heat and frequent gear changes from driving all day just wore it out. Replacing it with a GCC-spec part solved about 80% of the noise. The rest, he said, is just how the gearbox is on these cars after 90,000 km of city driving.

[AlanDella]

If you own an older GCC-spec Land Cruiser or Patrol used for occasional desert trips, don't panic at a clunk. These are tough trucks with a solid rear axle. When you shift to reverse on flat ground, the entire drivetrain takes up slack, making a single, audible sound. It's normal. Be concerned if the clunk is metallic, repeats, or happens with a shudder. That could point to worn universal joints (U-joints) in the propeller shaft, a common issue if the vehicle has been through sand dunes and dusty roads, which accelerate wear on these components. A good garage in Sharjah or Abu Dhabi can check the U-joints in minutes.

[VanReed]

انا عندي تويوتا كامري ٢٠١٨ و تصير هالضجة لما اغير القير للراجع خاصة في الصيف. غيرت زيت القير عند الوكالة و صار الوضع احسن نوعا ما. الميكانيكي قال انه مع حرارة الجو فوق ٤٥ درجة، لزوجة الزيت تقل و يكون الاصطدام بين التروس اقوى. انصحك تفحص مستوى الزيت اول شي.

[TeaganRose]

As a fleet manager for a company with ten Corollas used by sales staff, we standardize addressing this issue. A pronounced clunk often emerges around the 80,000 km mark, primarily from deteriorated engine mounts due to prolonged idling with AC on during client visits. We include mount inspection in our 60,000 km major service. The cost to preemptively replace mounts is lower than repairing a damaged transmission linkage caused by excessive engine movement. For our 2020 models, this proactive maintenance has reduced unexpected transmission-related workshop visits by an estimated 30%.