Sonnax 34200-40K Smart-Tech Overrun Clutch Valve Kit For 1997-Up GM 4L80/4L85-E
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Sonnax 34200-40K Smart-Tech Overrun Clutch Valve Kit For 1997-Up GM 4L80/4L85-E

$170.00
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Superseded Part Number: S34741ST, 34200-40K Interchange Part Number: S34741ST, 34200-40K Manufacturer Part Number: S34741ST, 34200-40K Other Part Number: S34741ST, 34200-40K Brand: Sonnax Manufacturer Warranty: Yes  Sonnax Smart-Tech® Overrun Clutch Valve Kit Part No. 34200-40K Fits units '97-later Insufficient holding power in the overdrive roller clutch is the underlying cause of chronic overdrive roller clutch failure in hardworking 4L80-E and 4L85-E transmissions. When the roller clutch fails, the damage can be catastrophic and the only fix is replacing the drum, planetary assembly and mating components. The Sonnax Smart-Tech overrun clutch valve kit 34200-40K offers a hydraulic solution to this known mechanical problem. With unique rerouting of hydraulic fluid pressure, this patented kit keeps the overrun clutch applied at all times (except OD 4th), reinforcing the roller clutch to adequately support heavy loads. Improves OD roller clutch holding power in D4 and Reverse ran

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