OC4739-1 Lakewood, WA OC4739-1 Tacoma, WA Tru Cool Lakewood, WA Tru Cool Tacoma, WA Shift Kit Lakewood, WA Shift Kit Tacoma, WA 4L60E Transmission Lakewood, WA 4L60E Transmission Tacoma, WA 700R4 transmission Lakewood, WA 700R4 transmission Tacoma, WA Turbo 400 Transmission Lakewood, WA Turbo 400 Transmission Tacoma, WA 4L80E Transmission Lakewood, WA 4L80E Transmission Tacoma, WA Transmissions Lakewood, WA Transmissions Tacoma, WA Transmission Coolers Lakewood, WA Transmission Coolers Tacoma, WA Overhaul Lakewood, WA Overhaul Tacoma, WA Rebuild Lakewood, WA Rebuild Tacoma, WA





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4L60E SONNAX REVERSE BOOST VALVE KIT .490" OD 93-05 77898E-3K (S74507FJA)
4L60E SONNAX REVERSE BOOST VALVE KIT .490" OD 93-05 77898E-3K (S74507FJA)
 
Our Price: $55.33

Quantity in Stock:100

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Product Code: 320763200177
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Description
 
COMPLAINT;Insufficient line rise, 3-4 clutch failure, Poor shift quality
CAUSE;
A worn boost sleeve can allow torque signal and reverse oil cross leakage or leakage to sump
CORRECTION;
These closely toleranced valve and sleeve kits restore hydraulic integrity and prevent leakage.
These kits valves are in .490" increased boost ratio sizes.
SONNAX PRODUCT SUMMARY;
Vehicles with a 4L60-E transmission frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty cycle of the EPC solenoid causes the boost sleeve to wear quickly. Oil entering the torque signal orifice, leaks past the boost valve and exhausts at the reverse orifice. Oil enters the torque signal orifice, leaks past the boost valve, and exhausts through the reverse orifice, resulting in poor line rise. Reverse oil can exhaust both to the sump and back through the torque signal orifice.
Increased spool diameters (.490" EPC spool diameter), which will result in a higher boost ratio to raise line pressure and provide firmer shifts.
The boost valves have been specially hard coated to eliminate excessive wear from occurring on the inside diameter of the sleeves. These boost sleeves have been manufactured from high quality aluminum, specifically designed to resist wear.

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