SONNAX AOD-E, 4R70W (1991-UP) PRESSURE REGULATOR BOOST VALVE

Quantity in Basket: none Code: SNX 76948-02K Price: $19.23 Shipping Weight: 1.00 pounds

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A common complaint in vehicles with AODE/4R7OW transmissions is low line pressure or throttle sensitive buzz, especially when hot. This is often caused by a worn main regulator valve. The valve frequently wears on the boost spool diameter and allows EPC (electronic pressure control) oil to leak to exhaust. This leakage results in poor line rise. When the oil temperature increases, the oil becomes less viscous and more leakage occurs. The two Sonnax replacement assemblies 76948-01 and 76948-09 eliminate the above problems with a direct replacement main regulator valve. Another common complaint with these transmissions is poor reverse boost, often the result of a worn pressure regulator boost sleeve. The sleeve should be checked while replacing the main pressure regulator valve. Sonnax offers a replacement pressure regulator boost valve and sleeve kit 76948-02K.