Shift Kit TRANSGO Reprogramming HD2 1991/13 4L80E 4L85E

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Transgo Reprogramming Kit: GM 4L80E And 4L85E (1991–2013) Designed for 1991–2013 General Motors vehicles featuring 4L80E and 4L85E automatic transmissions, this Performance Reprogr amming Kit addresses frequent issues such as absent upshifts, sluggish 2-3 shifts, damaged direct frictions, and mechanical breakage. It also resolves common solenoid performance and gear ratio codes. The factory boost valve assembly is prone to wear, often leading to insufficient pressure or dangerous runaway boost pressure. Low pressure typically results in direct clutch failure and shift quality issues, while runaway pressure can cause catastrophic damage to the transmission case, piston, and direct drum. Features and Benefits Enhanced Durability: Calibrated pump, valve body, and internal components work with an increased line pressure curve to boost shift quality and longevity. Triple Torque Capacity: A laminated triple separator plate enables dual feeding for the 3rd gear clutch—the transmission's primary weak point—without requiring full disassembly. Reliable Pressure Regulation: A hardened, wide-land boost valve and bushing design prevents wear to ensure consistent performance. System Protection: The included EPC boost pressure relief valve system guards against runaway pressure to prevent cracked cases and drum failures. Corrects, Prevents, and Reduces Breakage caused by high pressure Soft 2-3 shifts and burnt direct clutches Slow 3-2 downshifts and absent upshifts Harsh 1-2 shifts Low pressure resulting from solenoid filter failure Error codes: 39, 68, 85, 86, 87, P0731, P0732, P0733, P0734, P0751, P0756, P0894, and P1870 Kit Includes Laminated triple separator plate, gaskets, and drill bits USA-made hardened boost valve, bushing, and pressure regulator components Relief valve system (plate, valve, spring, e-clip, and nuts) Heavy-duty intermediate case snap ring and reinforced 4th feed bolt 16 direct clutch return springs 1-2, 3rd, and accumulator valve springs Actuator filter tapered plug, O-rings, and end plugs Transmissions: 4L85E (MN8) 1991-2013, 4L80E (MT1) 1991-2013 Vehicle AM GENERALH1 HUMMER 1993-2005 4 SP 4WD V8 5.7L 6.5L DIESELASTON MARTINDB7 2000 4 SP RWD V6 3.2LBENTLEYARNAGE 2002-2006 4 SP RWD V8 6.8LCHEVROLETEXPRESS 2005-2016 4 SP RWD V8 6.6LSUBURBAN 2500 1996-2007 4 SP R/4WD V8 8.1LVAN FULL SIZE 2500 1996-2009 4 SP R/4WD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESELVAN FULL SIZE 3500 1995-2009 4 SP RWD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESELC/K, PICK-UP 1500, C/K, PICK-UP 2500 1995-2000 4 SP R/4WD V8 5.0L 5.3L 5.7L 6.0L 7.4L 6.5L DIESELEXPRESS 2002-2016 4 SP RWD V8 4.8L 6.0LSILVERADO 1500HD, SILVERADO 1500SS 1998-2007 4 SP R/4WD V8 6.0L 6.5LSILVERADO 2500, SILVERADO 3500 2001-2007 4 SP R/4WD V8 6.0LSILVERADO 2500HD 2001-2007 4 SP R/4WD V8 6.0LSUBURBAN 1500 1995-2008 4 SP R/4WD V8 6.0L 6.5L DIESEL 7.4LTAHOE 1995-2003 4 SP R/4WD V8 6.0L 8.1L 6.5L DIESELVAN FULL SIZE 2500 1996-2009 4 SP R/4WD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESELVAN FULL SIZE 3500 1995-2009 4 SP RWD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESELGMCSAVANA 2005-2016 4 SP RWD V8 6.6LYUKON XL 2000-2006 4 SP R/4WD V8 6.0L 8.1LSAVANA 2002-2016 4 SP RWD V8 4.8L 6.0LSIERRA DENALI 1998-2007 4 SP R/4WD V8 6.0L 6.5LSIERRA 2500, SIERRA 3500 2001-2007 4 SP R/4WD V8 6.0LSIERRA 2500HD 2001-2007 4 SP R/4WD V8 6.0LYUKON XL 2000-2006 4 SP R/4WD V8 6.0L 8.1LISUZUTRUCK NPR, W4 1987-2008 4 SP RWD V8 5.7L 6.0LJAGUARXJ12/XJR/XJS 1994-1997 4 SP RWD L6 4.0L V12 6.0LROLLS-ROYCEARNAGE/SILVER SERAPH 2000-2003 4 SP RWD V8 6.8L Alternate Words: Automatic Transmission, Reprogramming, Improvement , Correction, Shift , Valve Body Rebuild Kit Show more