This Controller is made for all who want a more modern Gearbox in their great old Mercedes
Link to the hompage for this product
Also a shop
The 722.6 Gearbox was introduced in 1996 and has 5 gears and lock up in 5. gear
It shares bolt pattern width the 722.3 which is why it fits most old Mercs.
Using the Controller it can be run in Manual or Automatic mode, and it support Paddle shifters.

complete kit

 650€ + shipment (For US customers No VAT = -25%) for parts above, controller, harness, main display

display-lcd    indicator

Gearindicator 7segment display is extra. +40€
email for more info, email found in the manual linked below.

External link to Ole’s own document, Email can be found in this document.
https://docs.google.com/document/d/1_WiBay-rg3oWv8VhuVyUuVJ-f22PwEzD5N_LuAQHUNI/edit

A little Youtube teaser ;-) in a om606 equiped r129

 

20 thoughts on “New 722.6 Gearbox in you old Car”

    1. Ole Fejer from denmark builds these controllers for the 722.6 gearbox, and is selling them, you will find his email in the uploaded instruction/manual at the bottom of the document.

    1. i dont know exact price, and think it depends on what you want, currency changes and changes in parts, display that shows what gear you are in, and setup, harness, shifter etc etc.
      i would email Ole Fejer himself at the adress that is in the instruction/manual linked above (wont post here, cause it will result in more spam)

    1. the controller costs as above, 550euro for everything needed, + another 35euro for the 7segment display that shows what gear you are in currently

      controller, harness and main display 550euro
      7segment display +35euro

      you also need the gearlever for the 722.6 gearbox, besides the obvious gearbox ;)

  1. If I want to install the 722.6 gearbox on my 1990 300SEL, which rear differential should I be using?
    What is the final ratio?

    1. that depends on what type of driving you want to be doing, and at what RPM, i think your 300SE should have a 3.46 differential, with the fourspeed without lockup its a tad to revvy in my taste, but with the 722.6 it might be pretty perfect, you will have about the same ratio up to fourth gear, but with less slipp, and then a overdrive aswell as lockup on fifth gear.

      id keep what you got for starters, should land you somewhere along 2500rpm at 100km/h compared to current 86km/h at the same speed at fourth gear (less speed acctualy with the slip in the converter)

      if you want to go lower in ratio, and have the ability, a 300SD differential from a gen2 w126 is the best option i think, (2.82 something) i could probably arrange shipping of one of those if you want to from the USA,

      but a big advantage of the 722.6 is not needing to play with differential ratios, when you have overdrive and lockup

  2. Hi, for the m117 engine. which exact model would i need?
    and how much hp/ nm can the normal .6 handle. since ime running 334 whp and 545 nm right whit my modified .2 tranny.

  3. mmmm, ok i have a couple of M100 powered cars. I know the 722.6 should be able to handle the torque but would it be worth my while to adapt these trans to an M100? What sort of converter should I Use? one from a V12 for example?

  4. HI Ole . Luke aked me to contact you .We have a customer who has bought a G Wagen with OM606 and 722.6 with controller . Its the vehicle thats on DPUKs website . Right now it will only change gears by shifting with the paddles – can I reprogram the contoller so that it will drive in normal auto format . Previous owner has broken the joystick on controller and we think something may have got reset by mistake . Also can 1234 gears be selected through the gearshift as per normal car as well as new customer isnt botherd about steering wheel paddles . Hope you can help – I have downloaded the installation and set up files . Thanks Allan Gibson . Gibsons Auto Services

  5. Hello!

    Does the installation require an electrician or can a mechanic just straight connect them together?

    I want to install only a 722.6 box on my stock 1992 3L M103 300E. What other parts to I need other than what this kit provides? The transmission, the gear lever and the tools are all available already.

    Thank you.

    1. Its a pretty straightforward swap, al you need is the stuff you buy, and a gearlever that mates to the gearbox lever (and is from a 722.6) and between the gearbox and the lever connect the Gearboxcontroller that will manage the 722.6 gearbox.
      in case you have any more questions you could email Ole Fejer himself, his email can be found in the manual for gearbox controller 722.6 linked above

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