4L80E 4L85E Reverse Servo Piston with Hump Billet Aluminum HD 1997-up 34912AC
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4L80E 4L85E Reverse Servo Piston with Hump Billet Aluminum HD 1997-up 34912AC

$94.51
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Modified Item: No  Country/Region of Manufacture: United States Custom Bundle: No Surface Finish: New Manufacturer Part Number: 34912AC Brand: Adapt-A-Case Fitment Type: Direct Replacement Non-Domestic Product: No Transmission Type: Automatic Manufacturer Warranty: Unspecified Length 4L80E - 4L85E Transmission Reverse Servo Piston Heavy Duty Billet Aluminum fits 1997-on Solid Upgrade for your Hard Working Truck! Overall, the 4L80E is a fairly heavy-duty transmission. One of its lesser points is the cast aluminum reverse servo piston. This weak link is prone to breakage while enduring the repetitive cycling that occurs in plow truck applications, when the boost valve has worn or when the pressure spikes. Our solution is this burly billet aluminum version. A direct replacement, it’s much stronger than the OEM casting by nature. Our engineers have made an effective leap forward in design to ensure your customers’ demanded durability. The factory unit is weak where it needs to be strong:

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