4L60E 4L65E 4L70E TRANSMISSION "FACTORY" STYLE REVERSE BOOST VALVE & SLEEVE KIT .490" DIA. FITS '93-'05 SONNAX 77898E-3K

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S74507FB
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4L60E
4L65E
4L70E
'93-'05 4-SPEED AUTOMATIC TRANSMISSIONS:
REVERSE BOOST VALVE & SLEEVE KIT
  • OVERSIZED .490" Diameter
  • "FACTORY" STYLE
  • FOR EARLY PUMP
  • FITS 4L60E, 4L65E, & 4L70E EQUIPPED CHEVY CADILLAC BUICK GMC PONTIAC:
  • BUICK RAINIER '03-'05
  • BUICK ROADMASTER '95-'96
  • CADILLAC ESCALADE '99-'05 5.3L 5.7L 6.0L
  • CADILLAC FLEETWOOD/BROUGHAM/LIMO '95-'96 5.7L
  • CHEVY ASTRO & GMC SAFARI '93-'05 4.3L
  • CHEVY AVALANCHE '01-'05 5.3L 8.1L (4L60E)
  • CHEVY S-BLAZER & GMC S JIMMY '93-'05
  • CHEVY & GMC C/K 1500 PICKUPS '93-'97 4.3L 4.8L
  • CHEVY & GMC C/K 1500-2500 '93-'97 5.0L 5.3L 5.7L 6.0L (WITH 16 BOLT PAN)
  • CAMARO & FIREBIRD '93-'02
  • CHEVY COLRADO  '03-'05
  • CAPRICE '93-'96
  • CORVETTE '93-'05
  • CHEVY TRAILBLAZER & GMC ENVOY '99-'05
  • CHEVY IMPALA '93-'96
  • CHEVY S10, GMC S15 & SONOMA '93-'05
  • CHEVY SILVERADO 1500 & GMC SIERRA 1500 '98-'05 4.3L 4.8L 5.3L SOME 6.0L
  • CHEVY SSR '03-'05
  • CHEVY & GMC SUBURBAN 1500 '93-'05 4.8L 5.0L 5.3L 5.7L
  • CHEVY & GMC SUBURBAN 1500 '93-'05 SOME 6.0L (WITH 16 BOLT PAN)
  • CHEVY TAHOE & GMC YUKON '95-'05 4.8L 5.3L 5.7L
  • CHEVY TRACKER '98-'04 1.6L 2.0L (WITH 16 BOLT PAN)
  • CHEVY & GMC 1500 VAN '93-'05 4.3L 4.8L 5.0L 5.3L 5.7L 6.5L (WITH 16 BOLT PAN)
  • CHEVY & GMC 2500 VAN '93-'03 (WITH 16 BOLT PAN)
  • CHEVY & GMC 3500 VAN '93-'99 4.3L
  • GMC CANYON '03-'05
  • GMC YUKON & YUKON XL '00-'05 4.8L, 5.3L, & 6.0L WITH 16 BOLT PAN
  • HUMMER H2 '02-'05 6.0L (4L65E)
  • PONTIAC FIREBIRD & TRANSAM '93-'02
  • OLDSMOBILE BRAVADA '93-'03
  • FITS 4L60E EQUIPPED HOLDEN:
  • ADVENTRA '04-'05
  • COMMODORE '00-'05 3.6L 3.8L 5.7L (WITH 16 BOLT PAN)
  • MONARO '00-'05
  • FITS 4L60E EQUIPPED ISUZU:
  • ASCENDER '03-'05
  • HOMBRE '97-'00
  • Sonnax valve and sleeve kits restore hydraulic integrity and prevent leakage.

  • INCLUDES BOOST VALVE & BOOST SLEEVE
  • ALUMINUM CONSTRUCTION
  • WE'LL LET THE EXPERTS FROM SONNAX EXPLAIN:

"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."

  • PHOTO SHOWS ACTUAL REVERSE BOOST VALVE & SLEEVE ASSEMBLY
  • MADE IN THE USA
  • SONNAX  77898E-3K
  • FREE SHIPPING TO ALL 50 U.S. STATES & PUERTO RICO!
  • WE SHIP WORLD WIDE