Does anyone happen to know what the transmission valve body casting identification number for the 2005 SRT6 is ?
Attached is an image of the the location of the identification number on the valve body

Thank you....
.

 

Mine is: "211 0006 11.03.05S", but any valve body from a 722.6 transmission should work OK.

 

Andrew, thank you for the response!

I contacted Sonnax and they no longer rework the 0006 assemblies as they are considered obsolete. Some rebuild kits are available, but may require drilling to fit some of the components.

Transgo has a shift kit 722.6-A which will work with the CF SRT6 with a retail cost of $115.

I also looked into a deeper trans pan from B&M part number 10300 retail $417 and and the least expensive was through mammoth racing at $341 with coupon available onsite at https://mammothracing.com/products/b...45028272996672. The larger pan requires a new dipstick and the part number given from the B&M with the Holley website (Holley) is 22300 at a retail cost of $115. The B&M larger pan also comes with a hole in the side of the pan to install temperature device to allow for a gauge for monitoring in the car on track.

The original reason for this research was that I attended a two day track event in 100F temperature and had trans slipping during up shift. I am not sure if the trans overheated, but going to pull the pan to see if there is any metal residue. The trans was a quart down, but not sure if this was enough to cause the slipping during up-shift.

Again, thanks for the information and will post my findings in the future.

 

I think it would be unusual for the valvebody to be worn unless you have really high mileage. I really think your main issue would be the low transmission fluid, but open it up and see if there's any metal.
If the transmission overheats then it will go into limp mode. If you're really worried about transmission heat, then Instead of fitting the bigger oil pan I'd probably fit a separate oil cooler (instead of using the tube in the radiator)..

When the valve body is worn the TCU adaption can no longer compensate for the wear and you'll generally see it first with a bad 2 - 3 upshift. The fix for this is the:
Sonnax - 68942 05K Overlap Control Valve Sleeves with O-Rings (1-2 4-5/2-3/3-4) kit.
This other kit is normally fitted at the same time:
Sonnax - 68942-23K Automatic Transmission TCC Damper Valve Sleeve Kit

There's also two other kits that help if the main pressure control valve is worn:
Transgo - Pressure Regulator Valve
Transgo - Lubrication Regulator Valve

The first thing to try would be the two Sonnax kits. You can get them from Sonnax (or also from Ali Express (really cheap) and they're easy to fit.

The other thing you haven't mentioned is whether or not you have a TCU tune. I write TCU tunes and sell them in the USA through the Mercedes Swap Shop. You might already have one, but If you're going to do a lot of track days, then you'll definitely benefit from one.
I think you should also upgrade to blue top solenoids. The blue tops provide better pressure control (but require different mapping) and along with the tune the pressure can be increased further and the shifts made quicker by altering the torque management maps for each of the shifts. I run all the above kits and blue top solenoids in my own SRT6.

BTW. I forgot to mention that if you having trouble getting your existing valve body re-worked, then you could also use the valve body out of an NA Crossfire, it's a latter model "06 06" and works just the same!

Let me know how it goes.

 

Thanks for the information relating to the Sonnax kits, if I decide to go to the blue top solenoids, then I will contact you relating to the TCU tune.

I had the oil from the transmission analyzed by Blackstone labs and it came back with no excessive metal particles and normal for the miles on the car which is good news.

I tried flushing the transmission by draining the oil from the pan, refilled to correct levels and drove for about one hour. I did this a total of three times and the up-shifting 2-3 was better, but still exists. I took apart the valve body and found burnt (Dark) transmission fluid. I was in process of installing the Trans-go 722.6A kit which should address the Up-Shift issue, when I found the 1-2 & 4-5 Overlap valve stuck in the lower valve body and would not move, I separated the upper and lower valve body's and currently soaking the lower valve body in trans fluid to try and un-stuck the valve. Attached is a diagram from the Trans-go Kit of the valve that is stuck.

When removing the plate separating the upper and lower valve body's, I found dark transmission fluid and some of the the small components looked like they were burnt. There is a diagram in the CF service manual of how to reinstall the various springs and components. I have been looking for a rebuild kit for the lower valve body that would include the springs and components, but so far no luck.

I checked Amazon and EBAY for a rebuild kit for the valve body that would include the various springs and other components, but could not find any.

If anyone knows of a rebuild kit for the 722.6 Valve Body, please let me know.

Thank you,

 

DXFIRE2005
Click on the attached link for a rebuild kit....
EDennis
DTMenace
ebay.com/itm/395923768780?_skw=2004+Mercedes-Benz+SLK32+AMG+722%2C6+rebuild+kit&itmmeta=01JDA1R S0TKN3YFWJXSQ46NY99&hash=item5c2ee545cc:g:r1sAAOSw L4FnPvWU&itmprp=enc%3AAQAJAAABEHoV3kP08IDx%2BKZ9Mf hVJKlhvGhGc4eg6NsOdwpFfM2LQPXN9kNyhTZhN2GmPwOR9kZd %2Fleh1ee2qVPrz8iZ0mZ5%2FiNNdpUBngec8hbZYH0VBKYulY ilLvOtGr%2BPUW0fvKsRfhhOru1j2%2FKWZ974895%2Bx8Nn8q L3RTsPY9KGOorEO80joR3rWZe6cZnCfOL1NlUm5pKrTdSIyfqr Dt9Aaa39%2FThH3dZ7q0twn6WYVH0lfQTvpzsN0IrumLGgbDGv beVrwOW70BVVCtQGDNLT65gFwasxYyt2hoHXIVHs3TXrNXWp7r fuBmA7laNqLcVyu6kYFpUcD5hWrej9JMSwaFobGZ2LA5V91Lao e7uEo%2BuL%7Ctkp%3ABFBMwpDjwepk