4JA1 crankshaft for Isuzu NHR54 TFR54 Rodeo pickup truck and D-Max engines.

The Isuzu 4JA1 crankshaft has a stroke of 92 mm, a main journal diameter of approximately 59.92-59.93 mm, and a connecting rod journal diameter of 52.92-52.93 mm. It uses a standard 70 mm main bearing bore diameter and typically has the specific OEM part number 8-94443-662-0.