The lack of smooth and controlled solenoid movements causes harsh gear shifts. Also, mechanical wear can obstruct solenoid movement.
Excessive wear inside solenoid valves causes fluid leaks and corresponding pressure drops.These symptoms might only occur in the beginning stages until the car reaches running temperatures and will not trigger any warning lights. 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.Īnother symptom is a severe lurch when shifting from Neutral to Drive or Reverse. Replacing faulty bearings with aftermarket upgraded ones solves the issue. Otherwise, the problem is with the secondary pulley bearing. Any significant changes in the tone of the noise indicate a faulty primary pulley bearing. While coasting at speed, with the loudest noise, shift the transmission into a lower ratio. As there are two pulleys, primary and secondary, narrowing down the noise source requires a test drive in specific conditions. Broken or worn down pulley bearing, which is a fairly frequent issue with these transmissions.There will be no other symptoms or warning lights. In some cases, there might be noticeable shaking. This may be intermittent or constant but usually happens only during acceleration. These transmissions have a common problem that shows up as a whining or rattling noise. Several Renault models come with a Continuously Variable Transmission sourced from Jacto. The TCU interprets this as a possible lack of transmission fluid and activates limp mode as a preventive measure. Faulty pressure modulation valve, causing increased differences in transmission fluid pressure during gear changes.Low transmission fluid level triggers a limp mode as a preventive measure to prevent damage caused by overheating and lack of lubrication.In this mode, the transmission will stay stuck in 3rd gear, and there will be a ‘Gearbox faulty’ dashboard warning. In most cases, the car runs and shifts fine for several miles after startup but switches into limp mode as it warms up. The harsh engagement happens as a result of different speeds between gears.Īnother common problem that affects many older Renaults with a four-speed transverse automatic transmission, designated as DP0, is a sporadic engagement of limp mode. Clogged lock-up solenoids obstruct their movement and cause delays during gear changes.The solution to this problem is a new and upgraded regulator. This happens as the spring inside the regulator weakens, resulting in a loss of hydraulic pressure and harsh shifts. Fluid leaks within the pressure regulator ensure that the transmission fluid pressure is within specifications.This problem usually appears only after the vehicle warms up and tends to be intermittent. More severe cases will trigger a ‘check gearbox’ warning on the dashboard. It will manifest as a harsh gear change combined with a loud bang. Older Renault with a four-speed transverse automatic transmission, labeled DP0, has a fairly common gear shift issue. Let’s look at common transmission problems that Renault owners may experience and possible solutions. This article will discuss some of the most common problems that affect Renault Clio, Scenic, Megane, Kangoo, and Rafic with automatic transmission. Judder and rattle on idle or when shifting gears.
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