LIVE from the 2017 ATRA Powertrain Expo, Sonnax Tech Specialist Jim Dial explains how the new Smart-Tech® Overrun Clutch Valve Kit (#34200-40K) outsmarts overdrive roller clutch failure in GM 4L80/85-E transmissions.
This revolutionary kit offers a simple hydraulic solution to a complex mechanical problem. It keeps the overrun clutch applied, allowing the clutch to share a load the OD roller clutch otherwise struggles with on its own.
• Fits ’97-later units
• Improves OD roller clutch holding power in lower gears
• Extends the life of workhorse transmissions while preventing warranty claims and comebacks
• Installs quickly onto the valve body — no transmission removal required
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