TCS Duramax Allison 1000 LML 4X4 Output Shaft 2011-2015 Allison 1000 LML 4X4 Output Shaft 2011-2015 All TCS shafts are made from Select Grades of Super Strength steel alloys and are approx. 50% stronger than the OEM versions. This 4X4 output shaft is: Made from 300M billet steel Ideal for heavy duty service applications Precision ground for high dimensional accuracy Ideal for those who challenge their vehicles at work or at play If you need a Tech Manual, shift kit, Red Eagle Performance Master Kit or parts for your Allison 1000 rebuild please see our store or ask us we will be glad to accommodate all of your part needs.