The PRR J1 was a class of 2-10-4 or "Texas" type steam locomotives with 69 in (180 cm) driving wheels built between 1943 and 1944. The J1 had over 95,000 pounds-force (422.6 kN) of tractive effort, plus an additional 15,000 lbf (66.7 kN) if the booster engine was used.