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| | | Forums66 Topics128,068 Posts1,055,882 Members48,428 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#42755 05/15/2003 9:51 PM | Joined: Nov 2000 Posts: 1,966 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,966 | Lots of options even now for the SM420 transmission. It depends on how much torque, or HP, and what speed (RPM) you need from the PTO shaft. What are you going to run? Muncie or Chelsea? modern or vintage? A modern Chelsea Single-gear PTO part # 100XRBJX-W3XA is one: shaft rotates same as engine rotation at 54% engine speed, has 7/8" dia. keyed output shaft and a cable or lever shift. Good for 125 ft-lb of torque at 1000 rpm. Good for dump hoist, etc. Search the swap meet or better maybe run an ad under parts wanted. One of the most important things about PTOs is the drive gear in the trans. PTO gear must match, hence a **** PTO is not likely to work on a GM trans.
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