Sonnax TCC Apply Valve Kit (Only PWM Units) 4L60E 4L65E 4L70E

Sonnax TCC Apply Valve Kit for 4L60E, 4L65E, 4L70E (PWM Units Only) GM 4L60-E, 4L65-E, and 4L70-E transmissions with PWM units often experience converter overheat lockup issues, including no lockup or premature lockup after 2nd gear when the fluid warms up. These problems are typically caused by valve bore wear and oil cross-leaks. Sonnax TCC Apply Valve Kit 77805E-K resolves these issues with an updated design featuring a PTFE seal to eliminate cross-leakage and ensure proper TCC operation. Features: Eliminates TCC drift on apply with updated stroke pressure PTFE seal prevents cross-leaking of converter signal and feed oil Works in both early- and late-style PWM pumps (spring included) Drop-in Zip Valve™ parts for quick and easy installation Contents: Aluminum valve PTFE seal Spring Symptoms: No lockup Code 894, 1870 Falls out of lockup when hot Fluid blown out of the fill tube Lockup immediately after 2nd gear Cause: Excessive pump bore-to-valve clearance allows TCC signal oil to leak past the spool, preventing proper lockup or causing it to disengage when hot. Converter feed oil can also leak, combining with signal oil to cause premature lockup. Correction: The Sonnax TCC Apply Valve Kit with PTFE seal eliminates bore cross-leakage and restores proper TCC functionality. Identifying PWM vs. Non-PWM Units: For PWM units, the OE valve features one spool at the indicated location. For non-PWM units, the OE valve features double spools, requiring Sonnax TCC Apply Valve Kit 77805-K. Note: Do not rely on OE valve material (steel vs. aluminum) to determine the unit type, as some early PWM pumps used steel TCC valves. Transmissions: 4L70E (M70) 2004-UP, 4L65E (M32) 1993-UP, 4L60E (M33,M30) 1993-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, CORVETTE, SONOMA, S/T PICK-UP, SAFARI 1995-2005 4 SP RWD V8 5.7L 6.0LSSR 2003-2006 4 SP RWD V8 5.3L 6.0LAVALANCHE 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 4.3LGMCSIERRA 1500 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0LYUKON  2000-2011 4 SP R/4WD V8 4.8L 5.3L 6.0LYUKON XL 2000-2011 4 SP R/4WD V8 4.8L 5.3L 6.0LSAVANA 1997-2016 4 SP R/4WD V6 4.3L V8 4.8L 5.3LHOLDENADVENTRA 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 4.3LPONTIACGTO 2004-2006 4 SP RWD V8 5.7L 6.0LFIREBIRD 1995-2002 4 SP R/4WD V6 3.8L V8 5.7LSAAB9'7X 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