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18 N Kent St, Kennewick. Wa.

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Mon - Friday / 9:00AM - 5:00PM


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Frequently Asked Questions

TCU has redundant data stored in firmware for 10+ different car variants that include torque curves, pressure maps, tcc control, gearbox planet ratio for large and small 722.6, and many more function calibrations, and when you use a scan tool to write coding to the chassis of a car it reverts any changed calibration area back to STOCK virgin calibrations for that coding of chassis that was entered.  DO NOT RECODE TCU OR YOU WILL GO BACK TO STOCK. If the coding string needs changed use mbgeartool/vediamo or pull the file and manually code with winols or other hex editors.  
That is located in ECU and NOT in TCU and is NOT recommended to be removed. Some guys wanna do Neutral Drops and that damages transmission. Also is there to keep engine from over revving if transmission is knocked into neutral.

Just contact us with your make and model and if you have TCU part number which starts with A03xxxxxxxx

Answer is No. SL55 uses 2.82 gearing and few other different codings.   CL55 tcu will work in S55 with no issues

These questions get asked alot.  Its best to use tcu that came from m113k car due to different torque ouput and only just change coding string with winols/vediamo/Mb gear tool to match scn for the car and gear ratio. It can be sent to us and the correct firmware flashed into tcu and coded for your swap.

If you swap a V8 into a V6 car that uses the Small 722.6 5G transmission is NOT reccomended due to very low torque capacity of small 722.6 transmission. Not to mention if you carry over the v8 coded tcu it will not work as small nag has different planetary gear ratio that would need to be edited and just a coding change does not carry over that information in firmware.

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