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SONNAX 400 BOOST VALVE & SLEEVE
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Quantity in Basket: none
Code: SNX 34910-01K
Price:
$29.70
Shipping Weight: 1.00 pounds
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Vehicles with a 400 transmission frequently have poor line rise, soft 1-2 and/or 2-3 shifts, and/or reverse engagement difficulties. These problems can be caused by the reciprocating reverse boost valve wearing the inside diameter of the boost sleeve. When this occurs, oil that enters the modulated throttle valve orifice leaks past the boost valve and exhausts through the reverse orifice or to the sump, resulting in poor line rise. Also, reverse oil can exhaust both to the sump and back through the modulated TV orifice. The outside diameter of the boost sleeve also allows some leakage through the pump body, which can increase boost oil loss. The Sonnax replacement assembly 34910-01K eliminates the above problems.
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