Change solenoids in 722.9
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Change solenoids in 722.9
Hi. Have a e250cgi that is a bit harsh when shifting from 2-3.
recently changed transmissionfluid but still same.
So i am reading about these solenoids. Ordered a kit with 8 pieces.
Does changing these require any coding? Can i change all or is it recommended not to?
thanks for all input 😊
recently changed transmissionfluid but still same.
So i am reading about these solenoids. Ordered a kit with 8 pieces.
Does changing these require any coding? Can i change all or is it recommended not to?
thanks for all input 😊
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2020 E450 4matic wagon
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Out Of Control!!
Joined: Apr 2019
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
EXTERNAL CAUSES
Hi. Have a e250cgi that is a bit harsh when shifting from 2-3.
recently changed transmissionfluid but still same.
So i am reading about these solenoids. Ordered a kit with 8 pieces.
Does changing these require any coding? Can i change all or is it recommended not to?
thanks for all input 😊
recently changed transmissionfluid but still same.
So i am reading about these solenoids. Ordered a kit with 8 pieces.
Does changing these require any coding? Can i change all or is it recommended not to?
thanks for all input 😊
You can SKIP the conductor plate solenoids !
Adaptations will give you temporary relief until TCU relearns exactly same timings.
This standard tranny issue has nothing to do with 722.9 TCU. Fixing stock poor shifts is experimental.
Don't muscle your clutches into sludge that will plug solenoids screens. Then you need a rebuild job not cheap solenoid set.
Last edited by CaliBenzDriver; Feb 20, 2025 at 09:16 PM.
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19 GLA45, 86 560SL, former: 14 E550 4Matic, 09 E350 4Matic, 83 240D manual, 78 450SLC, 81 500SLC
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
EASY SOLUTIONS
that means that while the clutch are poorly timed, they will shade friction junk that plug solenoid screens.
At that point clean solenoids will be "busy work" when clutches are slipping with very little material left to bite blue steels.
So I recommend to GO EASY when you recognize poor tranny shifts else it gets expensive.
🤞
In plain english... the easiest experimental step would be ALT-LIN. Should recognize improvements in less than 200Mi.
At that point clean solenoids will be "busy work" when clutches are slipping with very little material left to bite blue steels.
So I recommend to GO EASY when you recognize poor tranny shifts else it gets expensive.
🤞
In plain english... the easiest experimental step would be ALT-LIN. Should recognize improvements in less than 200Mi.
Last edited by CaliBenzDriver; Feb 20, 2025 at 09:48 PM.
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
You should also be careful just switching out solenoids. I remember reading somewhere that valve block solenoids are matched from the factory. Getting the dealer to replace the valve body and solenoids should run around $2000 US, but that includes a transmission service.
