Have troubles with your Renault transmission? Learn the most common problems of a bad Renault transmission and know the possible solutions to fix the problem.
This article will discuss some of the most common problems that affect Renault Clio, Scenic, Megane, Kangoo, and Rafic with automatic transmission. Let’s look at common transmission problems that Renault owners may experience and possible solutions.
Banging during gear shifts
The older Renault with a four-speed transverse automatic transmission, DP0, has a fairly common gear shift issue. It will manifest as a harsh gear change combined with a loud bang.
More severe cases will trigger a ‘check gearbox’ warning on the dashboard. This problem usually appears only after the vehicle warms up and tends to be intermittent.
- Fluid leaks within the pressure regulator ensure the transmission fluid pressure is within specifications. This happens as the spring inside the regulator weakens, resulting in a loss of hydraulic pressure and harsh shifts. The solution to this problem is a new and upgraded regulator.
- Clogged lock-up solenoids obstruct their movement and cause delays during gear changes. The harsh engagement happens as a result of different speeds between gears.
Switching to limp mode
Another common problem that affects many older Renaults with a four-speed transverse automatic transmission, designated as DP0, is a sporadic engagement of limp mode.
In most cases, the car runs and shifts fine for several miles after startup but switches into limp mode as it warms up. The transmission will stay in 3rd gear in this mode, with a ‘Gearbox faulty’ dashboard warning.
- Low transmission fluid level triggers a limp mode as a preventive measure to prevent damage caused by overheating and lack of lubrication.
- Faulty pressure modulation valve, causing increased differences in transmission fluid pressure during gear changes. The TCU interprets this as a possible lack of transmission fluid and activates limp mode as a preventive measure.
Rattling noise while accelerating
Several Renault models come with a Continuously Variable Transmission sourced from Jacto. These transmissions have a common problem that shows up as a whining or rattling noise. This may be intermittent or constant but usually happens only during acceleration. In some cases, there might be noticeable shaking. There will be no other symptoms or warning lights.
- Broken or worn down pulley bearing, which is a fairly frequent issue with these transmissions. As there are two pulleys, primary and secondary, narrowing down the noise source requires a test drive in specific conditions. While coasting at speed, with the loudest noise, shift the transmission into a lower ratio. Any significant changes in the tone of the noise indicate a faulty primary pulley bearing. Otherwise, the problem is with the secondary pulley bearing. Replacing faulty bearings with aftermarket upgraded ones solves the issue.
Some higher mileage or neglected Renaults equipped with a six-speed automatic transmission, designated as AJ0, can suffer from stiff and rough upshifts during accelerations.
Another symptom is a severe lurch from Neutral to Drive or Reverse. These symptoms might only occur in the beginning stages until the car reaches running temperatures and will not trigger warning lights.
- Excessive wear inside solenoid valves causes fluid leaks and corresponding pressure drops. Also, mechanical wear can obstruct solenoid movement. The lack of smooth and controlled solenoid movements causes harsh gear shifts. Replacing all solenoid valves at once is the best solution.
Judder and rattle on idle or when shifting gears
Newer Renaults with a 6-speed dual-dry-clutch automatic transmission, designated as 6DCT250, can have a problem with rattling, juddering, or even shuddering. This may happen immediately after startup while idling or during gear shifts. In most cases, this will come with a loud clattering noise.
- Excessive wear and play within the dual-mass flywheel, causing a metallic rattle while idling. Check the flywheel condition and replace it if there is any movement between the plates.
- A worn dual-clutch assembly as a result of normal wear-and-tear. Although there are repair kits that allow partial repair, replacing the whole clutch assembly is usually the best solution.
These symptoms may affect Renault Clio, Scenic, Megane, Kangoo, and Rafic. More important than the Renault model is the transmission model. You must find the transmission model installed on your car to research and troubleshoot a Renault vehicle properly.
These are some of the most common Renault transmission problems based on the YOUCANIC team’s experience and research. It doesn’t mean that all Renault vehicles have transmission problems.
We hope you find the Renault Transmission Problems guide helpful. Check these troubleshooting and repair guides for more help on your Renault.
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