Close

    • Mercedes 722.9 (7G) automatic transmission upgrades available from Weistec Engineering - Valve body, TCU, Torque Converter

      Here it is folks, what many said could not be done. For those keeping score, this marks the third breakthrough by Weistec Engineering (first being the M156 supercharger and second being CARB certification). The Mercedes 722.9 transmission is used in a variety of vehicles and made its debut in 2004. Tuners have struggled to upgrade it with some saying it was impossible due to electronic complications but parts are now available to take the transmission up to the 1000 pound-foot of torque handling range.

      The torque converter obviously does not apply to those with the MCT but the valve body, tcu, and other parts do. There will be more vehicles supported than just what is listed below.

      Here is what Weistec calls their Bullet Proof Transmission Upgrade:




      The transmission receives upgraded clutch packs, new gaskets and seals, filter, pump, and associated hardware. This also includes the valve body and TCU upgrade which can be purchased separately. Pricing? $5,489


      Key Features:
      • Increased Torque Capacity
      • Upgraded Clutch Packs Containing More Clutch Discs
      • Redesigned Clutch Piston Geometry
      • Increase Frictional Surface Area
      • Increased Clutch Material
      • Improved Heat Dissipation
      • New Gaskets and Filter
      • New Transmission Fluid Pump
      • New OEM Fasteners and Hardware
      • Fully Assembled and Ready to Run
      • Used by some of the fastest AMG vehicles


      Supported Platforms
      • 2008-Present C63 AMG (Sedan and Wagon)
      • 2012-Present C63 AMG Black Series
      • 2007-2008 CLK63 AMG
      • 2008 CLK63 Black Series
      • 2007-Present CLS63 AMG
      • 2007-Present E63 AMG (Sedan and Wagon)
      • 2007-Present S63 AMG
      • 2007-Present ML63 AMG
      • 2007 R63 AMG
      • 2008-Present CL63 AMG
      • 2009-2011 SL63 AMG



      722.9 Valve Body and TCU Upgrade


      This is the first and only valve body upgrade for the 722.9 transmission. This part improves the way the transmission shifts and increases line pressure. The changes in the TCU are made to compliment the hardware and make sure it all works correctly. With the increased pressure and software to compliment it this prevents the clutches from slipping. Turnaround time of 3 days, your parts must be used.

      Valve Body and TCU Upgrade priced at $1,478

      Key Features:
      • Increased Line Pressure
      • Faster Shifting
      • More Precise Shifting
      • Improved Transmission Lifespan
      • New Gaskets
      • New Filter
      • New Hardware




      722.9 Torque Converter


      This is the first and only upgraded torque converter for the 722.9 transmission. A lot of firsts coming from Weistec who continues to work their magic on Mercedes platforms.

      This does feature a higher stall of 2500 rpm which should help launches at the track considerably. Weistec stated that in their testing 60 foots dropped around two tenths which will have a large impact on a 1/4 mile elapsed time. It will also support over 1000 horsepower.

      Price is $2849.99

      Key Features:
      • Computer Designed
      • CNC Machined Billet Stator
      • 2500 RPM stall speed
      • +1000HP capable
      • Reduced 60 foot times
      • Improved Low Speed (Around Town) Driving
      • Maintains Factory Drivability

      .
      This article was originally published in forum thread: Weistec 7G Trans Upgrades started by JRCART View original post
      Comments 55 Comments
      1. SLS AMG's Avatar
        SLS AMG -
        Sticky, you are the man!

        good timing and excellent communicationClick here to enlarge
      1. whipplem104's Avatar
        whipplem104 -
        Thanks Sticky and Even Money. I hope everything works the way I hope. The idea of going back to the dealerships again is a little much to bare.
      1. PetroC63's Avatar
        PetroC63 -
        Thanks to Sticky, Weistec and to all others who tried answering my questions.Click here to enlarge

        Time to order a torque converter.Click here to enlarge
      1. LZH's Avatar
        LZH -
        Interesting discussion going on in the same thread over on MBW....looks like Jim and Earl are giving our old buddy Propain a good thrashing lol...
      1. BAD430BENZ's Avatar
        BAD430BENZ -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        Interesting discussion going on in the same thread over on MBW....looks like Jim and Earl are giving our old buddy Propain a good thrashing lol...
        i saw that......and Propain says he has no interest in modding his car but is wanting results and is looking for a warranty with the Weistec stuff .
      1. ecampbell's Avatar
        ecampbell -
        Come on guys...i was bored and thought it was time for some fun and what better to have it at his expense!
      1. Sticky's Avatar
        Sticky -
        Don't be too rough on him or you may make him run home crying.
      1. ecampbell's Avatar
        ecampbell -
        I just got my Bocelli tickets for vegas in November and I guess I was feeling a bit feisty...
      1. ecampbell's Avatar
        ecampbell -
        geez that just made me sound old.....

        Let me rephrase, my wife is Italian and we have missed two chances to see him in Italy. When I saw this one I had to jump (besides it is in November so my car will be going out to Weistec via vegas for some at this point unknown upgrades).
      1. Sticky's Avatar
        Sticky -
        I don't think Bocelli is necessarily generational, pretty popular all around and for a long time. I would like to see him live, missed him at the Pond (Honda Center) not too long ago.
      1. LZH's Avatar
        LZH -
        LOL - Earl, that was some good reading. I went round and round with him when the Weistec blower was first released and he said he needed to see results before he would consider it....LOL. riiight. All he cares about is 60-130 tune only.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        LOL - Earl, that was some good reading. I went round and round with him when the Weistec blower was first released and he said he needed to see results before he would consider it....LOL. riiight. All he cares about is 60-130 tune only.
        He's a tool, a tire kicking tool! His logic makes about as much sense as me calling up a plastic surgeon asking questions about getting a boob job for myself....I love tits, but I would never buy a set for myself LOL.
      1. mramg1's Avatar
        mramg1 -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        He's a tool, a tire kicking tool! His logic makes about as much sense as me calling up a plastic surgeon asking questions about getting a boob job for myself....I love tits, but I would never buy a set for myself LOL.
        Oh come on now, think of the possibilitiesClick here to enlarge
      1. Exeenom's Avatar
        Exeenom -
        This is a great package from Weistec.... with such nice upgrades, Weistec could easily take over the Mercedes Performance Aftermarket scene Click here to enlarge

        Does anyone know if it's possible to get the TCU upgrade without the transmission upgrade (mainly for the NA guys)? Also, when can we expect more details about the TCU upgrade? Very interesting stuff....
      1. George Smooth's Avatar
        George Smooth -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        LOL - Earl, that was some good reading. I went round and round with him when the Weistec blower was first released and he said he needed to see results before he would consider it....LOL. riiight. All he cares about is 60-130 tune only.
        I would question the tune only part as I bust himself by saying he has done airbox mods. In my neck of the woods you call a guy like that "Mr Pump Fuel only" as guys here like claiming everything is done with pump fuel.Click here to enlarge