Frequently Asked Questions

The difference between blue top and brown top solenoids is their orifice I.D (blue tops have a larger opening). and internal windings/closing spring rate that's it, oh, and PWM table control in firmware.  Blue top solenoid higher fluid flow results in higher pressure that produce shorter shift events during part throttle operation that gives more firm faster shifts part throttle than old obsolete brown tops, tcu tunes work for brown tops but performance won’t be at peak level compared to Blue Tops and shifts per gear might not feel exactly the same.  The majority of 2005-2006 722.6 transmissions have blue-top solenoids stock, Most all V12 cars came stock with them 722.649 trans. Some older 03 04 cars had transmissions replaced due to radiator issues and got updated transmissions with blue-tops. When you change out the conductor plate is when you can see if you have blue or brown/black solenoid tops. If you have brown tops my calibrations still work but won't be the greatest as PWM tables are set for blue tops as most upgrade to blue tops anyways. For best performance is to upgrade them to blue tops. SLR tcu will still work with brown-tops but performance will be degraded and shifts might not be exactly the same until you upgrade. All 722.6 Cars need blue top solenoids for the best results for any tcu tune.
3-5 business days to flash/code and bench test and ship tcu out.  Each TCU is stress tested for 24hrs on the bench to make sure they function correctly before shipping but sometimes they get damaged in shipping due to g-forces when the package is thrown around by careless usps workers.

Absolutly NOT!

TCU tune will not fix issues with valve body, internal clutch pack leaking seals, burnt clutches etc.

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.

We have a 90-day warranty on the supplied hardware from the date of purchase. We use tcu cores and inspect, clean, test them before shipment.  Always make sure power is off in car before you swap tcu. Hot swapping can cause damage.

If you have ATF on tcu plugs, you will need to replace 13 pin connector at transmission and clean tcu plugs with contact cleaner before you install tcu.  ATF can damage the board inside TCU.

warranty void if tcu is tampered with and firmware copied. data counters have been coded into the firmware to verify how many times files have been pulled.


Answer is possibly depending on vehicle!

There is many different firmware versions that need to match what vehicle you are putting tcu into.  You either buy the correct part number tcu for your car and have it coded to work or you can send us your egs52 and we can flash in correct firmware and coding.

There are around 5 different hardware versions of egs52 ciruit boards from base version to full spec board that are used in Porsche, Ssyangyong, Mercedes, Chrysler.  One style may work fine in your mercedes but not work in porsche that needs analog inputs and that circuitry is missing from the board.

Faster shifts with a TCU tune results in less slippage, and therefore less transmission heat and wear.  It's hard to point the blame at the TCU exclusively for ANY transmission failure unless its a beginner transmission tooner. It's not like the guys losing transmissions are 100% stock otherwise.... these guys have tons of other mods and are pushing a couple hundred extra HP too.... oh, and the a lot of these cars are now at 100,000+ miles that have had lack of transmission services and beat on from the street to 1/4 mile track.  #1 Cause of transmission failures is that you *Don't Service Your Transmission Regularly*

In a daily driver scenario you should change your transmission fluid and filter annually. Even if the vehicle is more of a weekend or fair-weather cruiser, the fluid should still be changed about every 15,000 miles.

Transmission fluid is akin to engine oil in that it will chemically break down over time. Transmission fluid serves multiple purposes. First of all it is the hydraulic medium that allows the transmission to function. Second, it lubricates the transmission constantly and reduces wear. Third, it cleans the transmission as it cycles through. And finally, it pulls heat generated within the transmission and allows it to be radiated out through the case or transmission cooler. While the transmission fluid's function as a hydraulic fluid doesn't change with time, it can lose its ability to lubricate, clean, and dissipate heat over time as the fluid breaks down.

Everything mechanical wears a bit as you use it, and the debris generated contaminates the fluid, causing it to actually become abrasive to the very parts it was intended to protect. This is why we specifically mentioned changing the filter. *While a transmission flush is a good procedure, if you don't also drop the pan and change the filter you don't remove the collected debris, and ultimately the filter will clog. A clogged filter restricts fluid flow, which will damage to the transmission. No one would change their engine oil and leave the filter, but time and again we see transmissions that were flushed regularly but still burned up because of a clogged filter.

*Transmission flush:We caution that this method is only recommended if the current transmission fluid is in relatively good condition, showing no signs of damage.

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

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.  

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