General Motors Shift Kits

General Motors - Shift Kit^®
KIT	Application	Features
SK Allison-Jr NEW	05-06 Allison 6 spd 1000 Series	Install from bottom. Increases torque capacity Corrects/Prevents/Reduces: Goes to neutral under load; 3-4 slip; burned C3 clutches; sticks in one gear; smart clutch control valves for increased durability; SHORT-CRISP-SMOOTH-upshifts and kickdowns.
Allison ShiftKit^® NEW	01-04 1000-2400 Series Duramax Diesel Chevrolet, GMC Diesel/Gas Trucks Heavy Duty, Street, Show & Competition	Corrects/Prevents/Reduces: Goes to neutral under load; 3-4 slip; burned C2 or C3 clutches; sticks in one gear; won’t move after extended parking; loss of pump prime; smart clutch control valves for increased durability; SHORT-CRISP-SMOOTH-upshifts and kickdowns. Handles 500 Street Horsepower.
SK^®4L60E	4L60E & 4L65E 93-05 Cadillac Escalade, GMC Envoy, YukonXL 5.3L, 6.0L, ChevroletAvalanche, Trailblazer, Blazer, Suburban 5.3L,6.9L, Oldsmobile Bravada Fits 4L65E Except Hybrid	Corrects/Prevents/Reduces: FIXES Code 1870 Trouble light & Hard 1-2 shift. No lockup or 4th. Fixes harmonic bounce that wears out pump and valves and causes shuttle shifts. Fwd and L/R clutch burnup; 1-2 bump; double bump; slide-bump.Has new design Isolator/Conv Valve that works Perfect in worn bore w/o special tools or machining. Lets you build real winners Easy and Fast. More Info
SK^®4T60E-Jr	4T60E 91-99 With Modulator	Corrects: Light throttle converter shudder. Contains hardened pins and “Tuff” accumulator piston seals to reduce clutch failure due to pin and seal wear, 3rd clutch seal is self expanding. Includes PWM valve, lock-up regulator valve & bushings. More Info
SK^®4T65E	4T65E 97-04 Without Modulator	For electronic pressure controlled transmission, parts and data included. Prevents long shifts and hard shifts, chatter or on acceleration, no 4th, or lock-up. Addresses Codes P1811 & P0741.
SK^®350	THM 350 69-83	Corrects/Prevents/Reduces: Falls out of high when hot. 3rd clutch failure; soft, late shifts; cross leaks.
SK^®4L80E	4L80E & 4L85E 91-05 GMC Yukon XL 5.3L, 5.7,6.6L, Hummer V-8, Chevrolet Suburban	Extreme quality boost bushing and valve.Corrects/Prevents/Reduces: High pressure parts breakage; has boost valve and pressure relief valve; direct clutch burnup; soft 2-3 slide-bang 1-2; low pressure due to solenoid filter breakup. Missing shifts with no diagnostic codes.
SK^®400	THM 400 65-up	Corrects/Prevents/Reduces: Soft Late Shifts: 3rd clutch burnup; rough 1-2; Excess passing gear; late shifts.
SK^®700	THM 700R4 81-up	Corrects/Prevents/Reduces: Absolutely prevents Stuck TV valve. Late shifts, downshift clunk; 3-4 clutch failure; no lockup; 2-4 band failure; early shifts; 1-2 slide/slide-bump; reverse delay hot; 2-3 cutloose; reverse clutch failure. 83-87: Kit lets you make Converter lockup-no wires needed.
SK^®700-Jr	THM 700R4 85-up	Corrects/Prevents/Reduces: FIXES late shifts - Sticking TV Valve. 3-4 clutch failure; soft or slide-bump 1-2; 2-3 cutloose; shuttle 4-3-4-3; soft or late 4th. FAST- Easy installation!
SK^®125	THM 125 80-up	Corrects/Prevents/Reduces:3-2 clunk; lockup shudder; reverse slip; converter drainback delay; late shifts; soft 1-2; band failure.
SK^®200-4R	THM 200-4R 81-up	Corrects/Prevents/Reduces: 3-2 cutloose; 1-2 slide or slide-bump; wrong gear starts; down-shift clunk; rough 2-3; late shifts; early shifts; kickdown delay.
SK^®440-Jr	THM 440 84-up	Corrects/Prevents/Reduces: 2nd clutch failure; 1-2 slide-bump; late or no upshift; lockup shudder; kickdown bang; soft shifts when hot; accumulator leaks; 3rd clutch seal failure.
SK^®279	THM 200 & 200C 79-up	Corrects/Prevents/Reduces: Reverse delay hot; downshift clunk when stopping; 1-2 slide or slide-bump; 2-3 cutloose; 3-2 kickdown cutloose.
SK^®200	THM 200 76-78	Corrects/Prevents/Reduces:Reverse delay; 3-2 down-shift clunk; soft 1-2;bind 2-3. 2nd gear starts; late shifts.
SK^®325	THM 325 79-82	Corrects/Prevents/Reduces:Slide bump 1-2; soft shifts; 2-3 bump;3-2 cutloose bang; band failure; 3rd clutch failure.
SK^®325-4L	THM 325-4L 81-up	Corrects/Prevents/Reduces: Rough 1-2; slide bump; 1-2 runaway; 3-2 downshift clunk; 2nd gear starts; 3-4 bump; 3rd failure; harsh 3-4; No upshift.
180-C	GM Postal Vehicles	Replaces/Upgrades: Breaking springs and pins
SK^®425	THM 425 66-78	Corrects/Reduces/Prevents: Soft late shifts; 3rd clutch burnup, rough 1-2.Excessive passing gear; late shifts
SK^®440-3	THM 440 84-up	Tripack (Fixes 3) Corrects/Prevents/Reduces: 2nd clutch failure; slide-bump 1-2; 2nd gear starts; rough 1-2; reverse slide-bang; 3rd clutch failure; 3-2 kickdown bindup; kickdown runaway; converter shudder; 4th clutch failure; burned 1-2 band; coast downshift clunk; 4-3 bang; soft lockup; no upshift.