Includes our exclusive Smart Trim/Clutch Control valve assemblies and items to modify the C2 clutch piston for increased capacity and more durability. The C2 clutch is the weakest part of the early 5 Speed Allison. Performance shift kit for the Allison 1000 valve body to improve pressures and shifting.. Shift Kit; Incl. Clutch Control Valve Assemblies/Springs;. BD Diesel Shift Kit - Chevy Allison 1000 2006-2008 6spd. Smart Clutch Control Valves For Increased Durability. Installation recommendation: Experienced technician. Experienced Technician Installation Recommended. Keep On Hand In Case You Ever Run Into Trouble. Shift Kit - Chevy Allison 1000 2006-2008 6spd. Short Crisp Smooth Upshifts And Kickdowns. SHORT-CRISP-SMOOTH-upshifts & kickdowns. Addresses Going To Neutral Under Loads. Addresses goes to neutral under load. won't move after extended parking. SHORT-CRISP-SMOOTH-upshifts &. Automatic Transmission Shift Kit. Wont Move After Extended Parking. Refer To Manufacturers Warranty. SHIFT KIT CHEVY 2006-2008 1000. Handles 500 Street Horsepower. Burned C2 Or C3 Clutches. burned C2/C3 clutches. Auto Trans Shift Kit. Sticks In One Gear. loss of pump prime. SHIFT KIT. kickdowns. 3/4 Slip. 3-4 slip

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