Superior Shift Kit 4L60E 4L65E 4L70E

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Superior 4L60E-L Shift Correction Kit (1998-Up) | Code 1870 & TCC Fix Take control of your transmission’s health with the Superior K4L60E-L, the industry’s most respected mechanica l "Problem Solver." This isn't just a shift kit; it’s a comprehensive recalibration package designed specifically for 1998-and-newer 4L60E, 4L65E, and 4L70E transmissions. Whether you're fighting the notorious P1870 slip code or looking to firm up "lazy" factory shifts in your Silverado, Tahoe, or Corvette, the Superior kit addresses the root causes of transmission failure. It replaces high-wear factory valves with upgraded components that stay smooth even under high-heat and heavy-towing conditions. What This Kit Fixes: The P1870 Fix: Includes the PWM Powervalve to eliminate the Torque Converter Clutch (TCC) slip code while maintaining factory driveability. Eliminates "Slide-Bump" Shifts: Corrects the annoying flare-up or "slide" during the 2nd and 3rd gear transitions. Worn Plate Recovery: Includes oversized checkballs to restore seal integrity on older, worn separator plates. Protects the 3-4 Clutch: Increases lube oil flow to the 3-4 clutch pack—the #1 failure point in the 4L60E family. Performance Benefits: Selectable Firmness: Includes instructions for both Regular Duty and Heavy Duty/Towing applications. Sprag Protection: Recalibrates internal timing to prevent premature failure of the forward sprag. Cooler Operating Temps: Improves internal lubrication and TCC engagement efficiency to shed heat faster. Transmissions: 4L70E (M70) 2004-UP, 4L60E (M33,M30) 1996-UP, 4L65E (M32) 1996-UP Vehicle BUICKRAINIER 2003-2007 4 SP R/4WD L6 4.2L V8 5.3LROADMASTER SEDAN, ROADMASTER WAGON 1995-1996 4 SP RWD V8 5.7LCADILLACESCALADE/ESV/EXT 1999-2006 4 SP R/4WD V8 5.3L 5.7L 6.0LFLEETWOOD, BROUGHAM, LIMO 1995-1996 4 SP RWD V8 5.7LCHEVROLETSILVERADO 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0LSUBURBAN 1500 1995-2008 4 SP R/4WD V8 4.8L 5.0L 5.3L 5.7L V8 6.0LENVOY, TRAILBLAZER 1999-2009 4 SP R/4WD L6 4.2L V8 5.3L V8 6.0LASTRO, BLAZER, SONOMA, S/T PICK-UP, SAFARI, CORVETTE 1995-2005 4 SP R/4WD V6 4.3LAVALANCHE 2001-2008 4 SP R/4WD V8 5.3L 6.0L 8.1LC/K, PICK-UP 1500, C/K, PICK-UP 2500, C/K, PICK-UP 3500(95) 1995-1997 4 SP R/4WD V6 4.3L V8 4.8L 5.0L 5.3L 5.7L 6.0LC-1500 2001-2015 4 SP 4WD V8 5.3LCAMARO 1995-2002 4 SP RWD V6 3.4L 3.8L V8 5.7LCANYON 2003-2013 4 SP R/4WD L4 2.8L 2.9L V6 3.5L L5 3.7L V8 5.3LCAPRICE SEDAN, CAPRICE WAGON, IMPALA 1995-1996 4 SP RWD V8 4.3L 5.7LCOLORADO 2003-2012 4 SP R/4WD L4 2.8L 2.9L L5 3.5L 3.7L V6 3.6L V8 5.3LEXPRESS 1997-2016 4 SP R/4WD V6 4.3L V8 5.3LTAHOE 1995-2013 4 SP R/4WD V8 4.8L 5.3L 5.7LVAN FULL SIZE 1500-2500 1995-2011 4 SP RWD V6 4.3L V8 4.8L 5.0L 5.3L 5.7L 6.5L DIESELVAN FULL SIZE 3500 1995-1999 4 SP RWD V6 4.3LSSR 2003-2006 4 SP RWD V8 5.3L 6.0LGMCSIERRA 1500 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0LSAVANA 1997-2016 4 SP R/4WD V6 4.3L V8 4.8L 5.3LYUKON , YUKON XL 2000-2011 4 SP R/4WD V8 4.8L 5.3L 6.0LHOLDENADVENTRA 2004-2007 4 SP 4WD V8 5.7LCOMMODORE 2000-2011 4 SP RWD V6 3.6L 3.8L V8 5.7LMONARO 2001-2006 4 SP RWD V8 5.7LISUZUASCENDER 2003-2008 4 SP R/4WD L6 4.2L V8 5.3LHOMBRE 1997-2000 4 SP RWD L4 2.2L V6 4.3LI SERIES (290, 370) 2006-2008 4 SP R/4WD L4 2.8L 2.9L L5 3.5L 3.7LOLDSMOBILEBRAVADA 1995-2004 4 SP R/4WD V6 4.2L 4.3LPONTIACFIREBIRD 1995-2002 4 SP R/4WD V6 3.8L V8 5.7LGTO 2004-2006 4 SP RWD V8 5.7L 6.0LSAAB9'7X 2005-2009 4 SP R/4WD V6 4.2L V8 5.3LSUZUKIVitara 2000-2004 4 SPD RWD,4WD Alternate Words: Automatic Transmission, Reprogramming, Improvement , Correction, Shift , Valve Body Rebuild Kit, K4L60EL, K4L60E-L Show more