![]() ![]() ![]() We rebuild these 7G-Tronic control modules for Mercedes main dealers and specialists all over the globe, so you can be assured of our very high standard of work. When we rebuild your control module we retain all the original programming so that you can just fit the unit back to the vehicle without any additional programming - simple plug and play. These control modules are programmed to the vehicle’s immobiliser and chassis number, so it is not possible to fit a second-hand unit to the vehicle, the only option other than purchasing a brand new unit from the dealer is to have your own control module rebuilt. When we rebuild your own control module we use higher rated components than standard, so you can be assured that once rebuilt, your control module will not fail again – this is how we are able to supply a lifetime warranty with every unit we rebuild. We can now fully rebuild your own 7G-Tronic control module and supply an unlimited mileage lifetime warranty for a fraction of the cost of a new unit. Remove the 8 solenoids that connect through the control module to the valve body (make note of their positions for correct re-installation).Remove the 10 screws that hold the control module to the valve body.Unplug the control module multi-plug connector and then remove valve body from the gearbox - do not use a pry-bar/screwdriver to force the multi-plug connector from the gearbox housing when removing the valve body or it may break the connector.Unscrew the 10 screws holding the valve body to the gearbox.When attempting to diagnose the transmission fault it is best practice to have the fault codes read from the transmission system as a first point of call, if you have fault codes stored for the internal speed sensors then this is a very good indication that you have a faulty transmission control module/conductor plate. We can now fully rebuild your own control unit within 2-3 working days and supply an unlimited mileage lifetime warranty* The fault is caused by the TCM conductor plate breaking down internally, preventing the control module/conductor plate from monitoring the correct rotational speed of the input shaft, making it unable to determine the slippage of the torque converter, causing ineffective torque clutch lock-up that prevents a smooth gear change or in some cases prevents gear selection entirely. The fault usually starts out as intermittent but always becomes permanent if left unresolved for long enough. ![]() This is a very common fault for Mercedes vehicles fitted with the 7G-Tronic automatic transmission with gearbox code - 722.9, often causing the transmission to hold too long in one gear before aggressively forcing the next gear into place, this causes a very rough and jerky gear change. ![]()
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