Common Faults of Changan Benben Automatic Transmission

[PaulAnn]

Changan Benben transmission failure may be caused by insufficient transmission oil or transmission oil leakage due to aging seals and poor sealing, or it may be caused by transmission failure. The following is a detailed introduction about the transmission: 1. The internal control mechanism of the automatic transmission is very precise, with small matching gaps, so the quality requirements for the oil are very high, and it must be kept clean. After long-term use, the transmission oil will produce oil dirt, which may form sludge, increasing the wear of friction plates and various components, affecting power transmission. 2. The automatic transmission oil change cycle is generally two years or 40,000 to 60,000 kilometers. After draining the old transmission oil, add new automatic transmission oil.

[DeLiam]

Once when driving a friend's Benben, I noticed the gear shifts were particularly jerky, making it feel like riding a boat. This kind of jerky shifting is most common in economy cars with automatic transmissions, especially during the low-speed 1-2 gear shifts, where the 'clunk' is particularly noticeable. After inspecting several cars, I found that in most cases, the transmission fluid hadn't been changed for too long, causing sludge to jam the solenoid valves in the valve body. Another issue is poor heat dissipation leading to excessively high oil temperatures—the thermometer showed the oil temperature could soar to 130 degrees after continuous uphill driving, directly aging the rubber seals in the valve body and causing oil leaks. The last car I repaired was even worse—it got stuck in 3rd gear and wouldn't move. Reading the fault code revealed that the speed sensor was clogged with metal shavings. The key to maintaining these small cars lies in frequent oil changes; replacing the original oil every 40,000 kilometers can prevent 80% of the issues.

[LilyLee]

My used automatic BenBen started acting up last year, taking two minutes to move after a cold start. The mechanic opened the oil pan and found the magnet covered in iron filings, saying the clutch plate wear debris clogged the oil passages. Another odd symptom was a humming noise during reverse parking, diagnosed as a leaking hydraulic valve body. The scariest moment was when the tachometer went wild on the highway and acceleration felt mushy – the repair shop found three wires melted by the exhaust pipe. Now I have leaks checked every three months; aging rubber seals drip conspicuous red oil spots in the garage, but replacing O-rings costs just over 100 yuan, far cheaper than transmission repairs.

[DelWillow]

A veteran driver who has driven a Benben automatic transmission for five years tells you that the most vulnerable part of this car is the dual-clutch transmission. Especially when starting at a traffic light, it shakes like a massage chair—most likely due to burnt clutch plates. Last month, I just helped a neighbor fix an issue where the car wouldn't move in D gear at all; upon disassembly, we found the guide bearing of the shift fork had fallen apart. In my opinion, the most important thing is not to cheap out with aftermarket parts. One owner replaced the valve body with a knockoff, and it started leaking oil within three months. Additionally, overloading beyond 1 ton can easily lead to trouble. Last year, hauling New Year goods up a slope directly triggered overheating protection, causing the dashboard to display a snowflake symbol and forcing a downshift, which scared me into pulling over to cool down for half an hour.

[DeLucas]

The most common issue we deal with at our repair shop is gear shifting delay. When we connect the diagnostic tool to read the data stream, we often find interruptions in the input shaft speed sensor signal. When disassembling the transmission, special attention must be paid to the aluminum oil pan screws, as the torque should only be set to 8 Nm. Last time, a junior mechanic used an impact wrench and ended up stripping the threads. Another common problem is the clogging of the oil filter screen. Some vehicles haven't had their filter screens replaced even after 200,000 kilometers, and metal shavings have completely blocked the mesh. When replacing the upgraded reinforced filter screen, remember to flush the oil cooler lines as well. There was a case where a vehicle triggered an alarm after just 300 kilometers post-overhaul, and it turned out that residual debris had damaged the new valve body.

[LaFrank]

As an after-sales consultant frequently handling transmission claims, the most common Benben faults fall into three categories: electronic issues like TCU module short circuits due to water ingress, mechanical problems such as planetary gear set tooth breakage, and hydraulic failures mainly involving stuck main pressure solenoid valves. When encountering acceleration weakness, don't rush to repair the transmission - first check if the air filter is clogged causing ECU torque limitation. Be cautious with self-paid repairs - while aftermarket valve body assemblies are cheaper, they often trigger fault codes. Genuine parts with two-year warranties offer better value. If you hear chain rattling during hard acceleration, it's likely a torque converter issue - replacing just this component saves 5,000 yuan compared to an overhaul. We strongly recommend changing transmission fluid at 60,000 km, as many excessive wear cases in our shop result from fluid degradation.