4L80E 4L85E TRANSMISSION LINE PRESSURE BOOSTER KIT SONNAX 4L80E-LB1 FITS '91+

SKU:
S34507FA
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$51.77
$58.99
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4L80E  
4L85E
'91-'08 4-SPEED AUTOMATIC TRANSMISSION WITH 17 BOLT PAN:
SONNAX
LINE PRESSURE BOOSTER KIT
s34507fa-sonnax-4l80e-lb1.jpg
 FITS THESE 4L80E & 4L85E EQUIPPED CHEVY, GMC, ISUZU, & 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
  • ISUZU NPR TRUCK (W4) '91-'08 5.7L 6.0L
  • FITS THESE 4L80E BENTLEY & ROLLS ROYCE MODELS:
  • BENTLEY ARNAGE '02-'06
  • ROLLS ROYCE ARNAGE / SILVER SERAPH '00-'03 6.8L
  • Achieve shorter shifts and increased torque capacity without creating low-speed harshness
  • Improved band and clutch holding capacity for increased durability
  • Progressive pressure increase as driving conditions become more demanding
  • All the benefits of increased line pressure without overloading the pump at idle
  • Simple and affordable drop-in solution with no special tools or reaming required.
  • Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive pressure increases as driving conditions become more demanding.

    Our pressure regulator springs are approximately 10% stronger than OE and more conservative in impact than other aftermarket kit springs. Large ratio boost valves provide higher pressure incrementally and when it is needed the most. The combination of these springs and valves in a Sonnax kit gives you the best of both worlds: a modest pressure increase at the low end, with a high-end pressure that is equal to or greater than that of other aftermarket kit springs.


  • PHOTO SHOWS ACTUAL SONNAX LINE PRESSURE BOOSTER KIT
  • INSTALLATION INSTRUCTIONS INCLUDED
  • SONNAX 4L80E-LB1
  • FREE SHIPPING TO ALL 50 U.S. STATES & PUERTO RICO!
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