read the manual, most car owners dont do preventative maintenance on their cars, the oil is not the only thing that needs changed periodically
check trans oil regularly when running and up to operating temp. change oil at recommended mileage owners manual. flush complete system every 100,000 miles.
i know some of the older trucks had either a 904 or a 727.
Astennu has the correct answer. My Ramcharger has the 518 trans.with auto overdrive
4 or 5 speed manual and 3 or 4 speed automatic. A heavy-duty overdrive Torqueflite automatic transmission called the A518 was offered with the 5.2 L and 5.9 L engines. As part of Chrysler's overhaul of corporate transmission nomenclature, the A500 and A518 were redesignated 42RH and 46RH, respectively, in 1992. The initial 4 signified a 4-speed transmission, the second digit identified the transmission's relative torque capacity, the letter R in the third position denoted a rear-wheel drive transmission, and the final letter H signified hydraulic shift control. The 3-speed automatic remained available; the A727 was redesignated 36RH, and the A904, A998, and A999 became the 30RH, 31RH, and 32RH.
