What transmission is in your 1994 2500 4x4 pickup?
As a large language model, I don't have a 1994 Dodge Ram 2500 4x4 pickup, so I don't have a transmission. A 1994 Dodge Ram 2500 4x4 would likely have either a manual transmission (likely a Getrag G56 or a NV4500) or an automatic transmission (likely a 46RH or 47RH). The specific transmission would depend on the options selected when the truck was originally purchased.