According to Marlin the transmission drain plug is 1 1/2" forward of the cast iron plate located in the middle of the transmission. The transfer case drain plug is located at the bottom of the t/case housing. The transmission fill plug is located on the driver side of the rear housing 3 1/2" behind the cast iron center plate. The transfer case fill plug is located on the rear fact just to the right of the 7-bolt rear seal, speedometer housing. Hope this helps.