Clutch Alignment Tool for DT12 (DD13 & DD15) – 2” 18 Spline Line-Up Shaft This clutch alignment tool is designed to help center the clutch disc during installation on Detroit DT12 applications commonly found behind Detroit DD13 and DD15 engine setups. Proper alignment helps the transmission/input shaft install smoothly and reduces installation time and frustration. Specifications Spline: 2.00” (50.8mm) – 18 spline Use: Alignment / installation tool only Applications Common on DT12-equipped trucks using DD13/DD15 powertrains, including: Freightliner: Cascadia, M2 112, 114SD (DT12-equipped configurations) Western Star: 4700 / 4900 / 5700 series (DT12-equipped configurations) Important Verify your transmission is a DT12 and your clutch hub is 2” 18 spline before ordering. Compatibility Reference Offered as a non-OEM alternative for applications that reference: W950589006100 DSN012T20022 Material / Notes Additively manufactured (3D printed) PETG tool What's Included (1) Clutch alignment tool as shown in the photos Disclaimer This is not an OEM Detroit/DTNA product. Any trade names, trademarks, or part numbers are used only for identification, compatibility reference, and descriptive purposes. No affiliation or endorsement is implied.