What are the common problems with the Peugeot 4AT transmission?
3 Answers
Peugeot 4AT transmission common problems include: loud noise, failure to shift when pressing the accelerator, and strong jerking sensation while driving. Below is additional information about the transmission: 1. Function: To change the transmission ratio and expand the range of torque and speed variation of the driving wheels, adapting to frequently changing driving conditions and allowing the engine to operate under favorable working conditions. Taking the 2019 Peugeot 4008 as an example, it is a compact SUV with body dimensions of: length 4510mm, width 1850mm, height 1628mm, wheelbase 2730mm, and fuel tank capacity of 53 liters. The 2019 Peugeot 4008 features a front MacPherson independent suspension and a rear torsion beam non-independent suspension. It is equipped with a 1.6L turbocharged engine, producing a maximum horsepower of 170PS, maximum power of 125kW, and maximum torque of 250Nm, paired with a 6-speed automatic transmission.
As a seasoned Peugeot mechanic with over a decade of experience, I've seen countless 4AT transmissions fail. The most troublesome is that AL4 gearbox - it often acts up after 70-80k kilometers. The solenoid valves are particularly prone to failure, causing asthma-like jerks during gear shifts, and in severe cases, getting stuck stubbornly in 3rd gear. Overheating makes it worse - when the snowflake and S mode lights illuminate on the dashboard during highway driving, consider that your warning sign. The oil pan filter frequently gets clogged with metal shavings; many cars we tow in have transmission fluid dark as soy sauce. The real kicker? Genuine repair kits aren't cheap - replacing solenoids costs 4-5k yuan including labor. Remember two lifesavers: change dedicated transmission fluid every 30k km without fail, immediately clean any clogged coolers, and switch to manual mode in summer traffic to cool things down.
I've handled dozens of used Peugeot 307s, and the 4AT transmission definitely requires special attention. This AL4 gearbox has well-known issues: it shifts particularly rough for the first 20 minutes after a cold start, which improves when warmed up but still produces clunking sounds during gear changes. The vehicle tends to shake noticeably between 40-60 km/h, feeling like driving over speed bumps. The most troublesome problem is reverse gear failure - some cars take 5-6 seconds to respond after shifting to R, making parking garage maneuvers extremely frustrating. Experienced owners know to always keep a transmission fault decoder handy for regularly clearing error codes. When buying these used cars, you must check the data stream with diagnostic equipment - stay away from any units showing oil temperature exceeding 110°C or abnormal pressure values. Fluid changes only provide temporary relief; a complete valve body assembly replacement with TCU can cost over 10,000 yuan when major repairs are needed.
