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While simple and generally reliable, Mitsubishi automatic transmissions can develop problems, especially at high mileage or if it is CVT transmission.
If your Mitsubishi has developed erratic shifting or won't shifting at all, it can indicate a serious problem such as faulty valve body, worn bands, faulty transmission speed sensor, torque converter, or something as simple as low transmission fluid level.
If your Mitsubishi transmission is not shifting normally, first check the transmission fluid level as soon as possible and, if needed, add the recommended fluid, typically Mitsubishi SPIII Fluid or ATC J4 Fluid for vehicles with the CVT transmission.
In this guide, we go over Mitsubishi transmission problems and steps to help you troubleshoot Mitsubishi transmission problems such as limp mode, no shifting, delayed shifting, and slipping.
The troubleshooting steps outlined below can be applied to Mitsubishi Eclipse, Lancer, Outlander, Galant, and Endeavor.
Mitsubishi transmission problems quite often are caused by low transmission fluid level. Transmission fluid leaks can develop around the transmission pan gasket.
Common Mitsubishi automatic transmissions problems:
Some of these symptoms may not be due to a transmission issue. For example, a faulty Mass Air Flow (MAF) sensor, failed catalytic convertor, or accelerator pedal could cause similar symptoms.
Mitsubishi 4-speed and 5-speed automatic transmission installed on Mitsubishi Lancer, Mirage, Galant, and Outlander are very reliable with few issues and can easily last over 150,000 miles.
Mitsubishi vehicles equipped with CVT transmissions are known to have transmission problems. In 2016, Mitsubishi recalled over 80,000 Outlander and Lancer vehicles with CVT transmissions because of delayed acceleration problems.
Issues that may cause Mitsubishi transmission problems:
Cars that use 4-speed (F4A51) or 5-speed (F5A51) automatic transmission can suffer from a sudden and complete loss of drive and reverse, making the car undrivable.
In most cases, this will happen while driving for some time or under heavy load. This issue will remain present even after the car cools down. There will be no check engine light or other symptoms.
Possible causes
Cars that use 4-speed (F4A51) or 5-speed (F5A51) automatic transmission can have an intermittent shift problem that will manifest itself as harsh, delayed, or even failed gear changes.
Depending on the fault, this can happen right from startup or after the car reaches operating temperature. In most cases, there will be a check engine light and corresponding codes stored in DTC memory.
Possible causes
Larger Mitsubishi SUVs that use a 5-speed V5A51 automatic transmission in longitudinal configuration can suffer intermittent issues with jumping out of gear.
Usually, this will happen while accelerating or going uphill, and it will occur in lower gears. In most cases, the driver will be able to perform manual gear changes.
Possible causes
Mitsubishi Lancers or Eclipse with Jatco JF506E 5-speed automatic transmission can experience a sudden loss of reverse.
In most cases, this will happen right after the transmission fluid has been replaced. Other gears will not be affected by this issue, and there will be no other noticeable symptoms.
Possible causes
Newer Mitsubishi cars use Continuously Variable Transmissions made by Jacto. Although available in several variants, all of them share several common problems.
An intermittent or constant whining or rattling noise is one of them. This will happen only while accelerating and may even come in combination with a mild judder. There will be no other symptoms or warning lights.
Possible causes
Most Mitsubishi automatic transmission problems are caused by easy to fix issues such as low transmission fluid or faulty transmission output speed sensor. The steps will help you troubleshoot the majority of Mitsubishi transmission problems.
If your Mitsubishi transmission is not shifting at all, shifting late, or slips, the first thing you need to do is check the transmission fluid level.
Checking the transmission fluid level is very easy as long as your Mitsubishi has a transmission dipstick.
The next step is to read fault codes from the transmission control module or what is known as the TCU. To read these codes, you will need a Transmission OBD-II Scanner. Basic code readers will not show a fault code.
Fault codes that show as stored status can be cleared. Any code that has present or current status needs to be addressed before you can clear that code.
Check if any open recalls or Technical Service Bulletin (TSB) exist for your Mitsubishi that affects the transmission.
Recalls if they exist are performed free of charge by any Mitsubishi dealer. To check if a recall exists on your vehicle, visit our Check Recalls page.
Mitsubishi Technical Service Bulletins for the transmission typically update the Engine or Transmsimon control unit software. A Transmission Control Module (TCM) TSBs may program the shift solenoids and therefore improve shift quality.
The problems in this list do not affect all Mitsubishi transmission. Overall, Mitsubishi automatic transmissions are reliable except for the 2014-2016 Mitsubishi vehicles equipped with CVT transmissions.
Checking the basics, such as transmission fluid level and read codes from the transmission control module, are just the starting point. Reading the fault codes with a transmission scanner can help you narrow the problem even further. Internal Mitsubishi transmissions may need to be diagnosed and repaired by a transmission repair shop.
By YOUCANIC Automotive Experts Published on: Tuesday, June 16, 2020. |