Mercedes 722.9 valve body information - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 12-26-2015, 12:47 PM Thread Starter
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Mercedes 722.9 valve body information

I have a 722.906 in my 2007 R350. I am looking for any information someone might have on the workings of the valve body.
The transmission has received a full rebuild and I am having issues with the K2 clutch engaging.
The electronics pack has been replaced and I am not getting any speed sensor or solenoid codes.
All clutch clearances are within spec.
I cant seem to find any sort of fluid flow charts for the valve body.
The car shifts fine up to third and then 4th gear is wide open. No signs of clutch pack slipping, so my guess is that K3 releases after 3rd and K2 is not engaging. The piston has been pressure checked and seems fine. (Little difficult using air instead of ATF)

If anyone has any information about the valve body that could help me resolve this I would greatly appreciate it.
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post #2 of 3 (permalink) Old 12-26-2015, 02:39 PM
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post #3 of 3 (permalink) Old 12-26-2015, 03:32 PM
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Originally Posted by markland556 View Post
I have a 722.906 in my 2007 R350. I am looking for any information someone might have on the workings of the valve body.
The transmission has received a full rebuild and I am having issues with the K2 clutch engaging.
The electronics pack has been replaced and I am not getting any speed sensor or solenoid codes.
All clutch clearances are within spec.
I cant seem to find any sort of fluid flow charts for the valve body.
The car shifts fine up to third and then 4th gear is wide open. No signs of clutch pack slipping, so my guess is that K3 releases after 3rd and K2 is not engaging. The piston has been pressure checked and seems fine. (Little difficult using air instead of ATF)

If anyone has any information about the valve body that could help me resolve this I would greatly appreciate it.
Just checking to make sure that an MB Star computer was used to code the new electronics to your VIN.
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