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Old 05-10-2017
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Hey Rollas

Just had an issue with a W5A580 in my WH Grand
Your code P0741, is not listed in any of my workshop manuals
The P074x codes refer to Torque Converter Clutch (TCC) slippage and pressure
The W5A580 have issues with their lock up clutches

First check for a worn or jamming pressure regulator valve in valve body
Secondly check for a sticky TCC solenoid (top right)

Finally it might be the actual TCC itself, which would require a reco torque converter

Maybe try some snake oil additive for trannys first
Cheers,
ren0vator
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