BD Diesel Shift Kit - Chev Allison 1000 2001-2005 5spd

If you're looking to get more out of your Allison 1000 transmission, especially if you're towing or hauling heavy loads with your 2001-2008 GMC Sierra 2500 HD, this shift kit from BD Diesel is a solid option. It's designed to improve the transmission's pressure and shifting characteristics, making it feel more responsive and durable under stress.

What sets this kit apart are the exclusive Smart Trim/Clutch Control valve assemblies. These are engineered to increase the durability of your transmission's clutches, which can help prevent common issues like burned C2 or C3 clutches, 3-4 slip, or loss of pump prime. The kit aims for short, crisp, and smooth upshifts and kickdowns, giving you a more confident feel when accelerating or downshifting. It also addresses potential problems like the transmission going into neutral under load or not moving after extended parking.

Keep in mind that this kit requires the transmission to be removed for installation of the internal parts, so it's best handled by an experienced technician. It's built to handle up to 500 street horsepower, making it a good choice for trucks that see regular use and occasional hard work.