How to replace solenoids on a Mercedes 7 speed transmission?
Replacing the solenoids from the Mercedes-Benz 7-speed transmission is very easy once you remove the valve body from the transmission. You will need to Torx T-40 bit to remove the bolt that holds the clamp in place. Once the clamp (bracket) is removed, you can pull the solenoids straight up to remove them. Reinstall the solenoids in reverse order.
Where to find a transmission control solenoid-electric problems?
If you are looking for where to find a transmission control solenoid, you are probably experiencing problems with your automatic gearbox. As a useful piece of advice, I would like to say that not all of the problems that modern gearboxes have are related to broken transmission control solenoids or valves.
Why is my solenoid not working when I downshift?
Dirty transmission fluid can cause solenoids to stay stuck open or closed, thereby making it more difficult for your transmission to change gears when it needs to. You Can’t Downshift and/or Your Car Revs When Braking This may also be a failing solenoid due to dirty transmission fluid.
How does a solenoid work in a car?
Solenoids are electro-hydraulic valves that control one or more gears depending on the transmission and build of the car. They control the flow of transmission fluid by opening or closing based on electric signals. When a solenoid opens or closes, it changes the pressure within the transmission, allowing your car to change gears.
Replacing the solenoids from the Mercedes-Benz 7-speed transmission is very easy once you remove the valve body from the transmission. You will need to Torx T-40 bit to remove the bolt that holds the clamp in place. Once the clamp (bracket) is removed, you can pull the solenoids straight up to remove them. Reinstall the solenoids in reverse order.
What does it mean when your transmission solenoid is broken?
This is a big sign that you have transmission shift solenoid problems because you have one or more shift solenoid for each gear, and if one is broken, it will not shift to that gear – instead, jump to the next gear directly. If the shift solenoid got damaged while the gear was engaged, it might cause the transmission to be stuck in that gear.
Dirty transmission fluid can cause solenoids to stay stuck open or closed, thereby making it more difficult for your transmission to change gears when it needs to. You Can’t Downshift and/or Your Car Revs When Braking This may also be a failing solenoid due to dirty transmission fluid.
Where are the shift solenoids located in a car?
There are two or more shift solenoids inside your transmission. The solenoids are typically integrated into the transmission valve body. If one or more of them fails, you’ll likely notice a handful of car problems.
When to replace Mercedes 722.9 valve body and conductor plate?
If these parts fail they will require replacement in order to extend the life of the transmission. The early 722.9 transmissions installed on Mercedes-Benz models between 2004-2008 had a higher failure rate. The majority of these transmissions were identified as VGS1 and required the replacement of both the valve body and conductor plate.
Why are Mercedes not selling replacement valve bodies?
Unfortunately, Mercedes-Benz declined to sell replacement valve bodies to independent repair shops claiming that these components were related to the security of the vehicle. Yet they will sell complete transmissions. Mercedes-Benz claims that they will not sell the valve body because it could aid in automobile theft.
When does a Mercedes Benz transmission go into limp mode?
Diagnose the transmission as soon as possible. While these are the typical symptoms of a failed valve body or conductor plate, Mercedes-Benz transmission can go into LIMP MODE due to other issues that may not be directly related to the transmission. These transmission problems may start developing as early as 50,000 miles.
Unfortunately, Mercedes-Benz declined to sell replacement valve bodies to independent repair shops claiming that these components were related to the security of the vehicle. Yet they will sell complete transmissions. Mercedes-Benz claims that they will not sell the valve body because it could aid in automobile theft.
If these parts fail they will require replacement in order to extend the life of the transmission. The early 722.9 transmissions installed on Mercedes-Benz models between 2004-2008 had a higher failure rate. The majority of these transmissions were identified as VGS1 and required the replacement of both the valve body and conductor plate.
Diagnose the transmission as soon as possible. While these are the typical symptoms of a failed valve body or conductor plate, Mercedes-Benz transmission can go into LIMP MODE due to other issues that may not be directly related to the transmission. These transmission problems may start developing as early as 50,000 miles.