Hard Parts

Allison 1000 4×4 Output Shaft 2001-2010

TCS Duramax Allison 1000 4×4 Output Shaft 2001-2010 Made in-house at TCS for heavy duty towing & competition applications. Made from 300M Billet steel for superior strength over the OEM version. Ideal for heavy duty service applications...

Allison 1000 C-2 Clutch Hub

Allison C-2 Clutch Hub TCS has addressed the early failure of the C-2 clutch hub in high torque/horsepower applications with this new billet steel clutch hub. Made from 4140 HTSR billet steel. Zinc Chromate finish. Spline is lengthened .125″ for...

Allison 1000 2000 Input Shaft

TCS Duramax Allison 1000/2000 Input Shaft Built to withstand everything thrown at it. Shaft is much stronger than the O.E.M. shaft. Made from 9310 Vacumelt steel. Precision ground for high dimensional accuracy. Ideal for heavy duty service applications...

Allison 1000 2000 2400 Manual Valve (Gently Oversized)

Manual Valve Allison 1000/2000/2400 (Gently Oversized) No tools required