Sonnax 4L60E Transmission Forward & Reverse Abuse Bore Plug 77754-21
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Sonnax 4L60E Transmission Forward & Reverse Abuse Bore Plug 77754-21

$8.40
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Brand: Sonnax Type: Valve Body Component Interchange Part Number: S74741G-6 Manufacturer Warranty: Yes Items Included: Abuse Valve Bore Plug Manufacturer Part Number: 77754-21  Universal Fitment: Yes Vintage Part: No Performance Part: No 4L60-E, 4L65-E, 4L70-E Forward & Reverse Abuse Bore PlugPart No. 77754-21 Fits in either of two locations The bore plug in GM 4L60-E, 4L65-E and 4L70-E units is held loosely in place with a coiled spring pin, allowing the opposing spring and oil pressure forces to stroke it within the bore. This constant oscillation causes the plug to wear and allows PR oil at the low overrun valve and 3-4 clutch oil at the 3-2 downshift valve to exhaust at the abuse valves. This excessive oil loss can result in delayed apply of the Low/Reverse clutch and a tie-up of the 3-4 clutch and 2-4 band. Sonnax Forward and Reverse abuse bore plug 77754-21 resolves these problems. This plug is used in two locations in the valve body: to separate the forward abuse and low

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