4L80E 4L85E TRANSMISSION BOOST VALVE & SLEEVE KIT, SELF REGULATING LIMITS EPC 95-105 PSI FITS '91-'08 BY SONNAX

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S34507RAK
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 4L80E 
 4L85E
'91-'08 4-SPEED AUTOMATIC TRANSMISSION WITH 17 BOLT PAN:
BOOST VALVE & SLEEVE KIT
  • SELF REGULATING
  • LIMITS EPC TO 95-105 PSI
  • SONNAX 34200-10K
  • FITS THESE 4L80E & 4L85E EQUIPPED CHEVY, GMC, & HUMMER MODELS:
  • AVALANCHE 02-06 4 SP RWD/4X4 V8 8.1L
  • C/K PICK-UP 1500-2500 95-99 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/6.5L DIESEL
  • C/K,SILVERADO/SIERRA PICK-UP, 1500, 00-03 4 SP RWD/4X4 V8 6.0L
  • C/K,SILVERADO/SIERRA PICK-UP, 2500, 00-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5 DIESEL
  • C/K PICK-UP 3500 95 4 SP RWD/4X4 V8 5.7L
  • C/K,SILVERADO/SIERRA PICK-UP 3500 95-03 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL
  • H1 HUMMER 93-05 4 SP 4X4 V8 5.7L, 6.5L DIESEL
  • SILVERADO 1500HD/1500SS/SIERRA DENALI 04-05 4 SP RWD/4X4 V8 6.0L
  • SILVERADO/SIERRA 2500/2500HD/3500 04-07 4 SP RWD/4X4 V8 6.0L
  • SUBURBAN 1500-2500 95 4 SP RWD/4X4 V8 7.4L/6.5L DIESEL
  • SUBURBAN 1500 96-99 4 SP RWD/4X4 V8 6.5L DIESEL
  • SUBURBAN 1500 06-07 4 SP RWD/4X4 V8 6.0L
  • SUBURBAN 2500 96-07 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5L DIESEL
  • TAHOE/YUKON 95-03 4 SP RWD/4X4 V8 6.0L/8.1L/6.5L DIESEL
  • VAN FULL SIZE 2500 96-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/8.1L 6.5L DIESEL
  • VAN FULL SIZE 2500 04-08 4SP RWD/AWD V8 6.0L
  • VAN FULL SIZE 2500 06-08 4 SP RWD V8 6.6L DIESEL
  • VAN FULL SIZE 3500 95-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/7.4L/8.1L/6.5L
  • VAN FULL SIZE 3500 04-08 4 SP RWD V8 4.8L/6.0L
  • VAN FULL SIZE 3500 06-08 4 SP RWD V8 6.6L DIESEL
  • YUKON 2500 04-06 4 SP RWD/4X4 V8 6.0L
  • YUKON 2500 04-06 4 SP RWD/4X4 V8 8.1L
  • YUKON 2500 07 4 SP RWD 4X4 V8 6.0L
  • FITS THESE 4L80E BENTLEY & ROLLS ROYCE MODELS:
  • BENTLEY ARNAGE '02-'06
  • ROLLS ROYCE ARNAGE / SILVER SERAPH '00-'03 6.8L

 

 

  • Hardened steel boost valve has an encapsulated relief valve that will allow EPC pressure to exhaust if it exceeds 95-105 psi.
  • Boost valve with over 20% wider spools to provide better durability and increased sealing contact area.
  • Boost valve spools have annular grooves to reduce side loading that causes wear.
  • Closely toleranced sleeve restores the hydraulic integrity between the valve and sleeve.
  • O-rings have been added to the sleeve to provide a positive seal that compensates for pump bore wear
  • Common problems in vehicles with a 4L80-E transmission include uncontrollable line rise (upward of 500 psi), high line pressure in reverse, broken direct clutch drums and/or broken cases. These problems can be caused by excessive EPC torque signal pressure. The Sonnax self-regulating reverse boost valve 34200-10K eliminates these problems by limiting EPC pressure.

 

  • SONNAX 34200-10K
  • PHOTO SHOWS ACTUAL SONNAX BOOST VALVE & SLEEVE KIT
  • FREE SHIPPING TO ALL 50 U.S. STATES & PUERTO RICO!
  • WE SHIP WORLD WIDE
FITS 4L80E 4L85E:
'91-'08