* 46RH/47RH: These were electronically controlled four-speed automatic transmissions. Very common in this era of Ram trucks.
* 46RE/47RE: These were also electronically controlled four-speed automatic transmissions, often found in higher-output engines or with towing packages. They are closely related to the 46RH/47RH.
* NV3500: This is a five-speed manual transmission.
* NV4500: This is a five-speed manual transmission, typically found in heavier-duty trucks or those with more powerful engines.
To know for certain which transmission is in *your* specific 1999 Dodge Ram 4x4, you'll need to check:
* The vehicle's build sticker (usually located on the driver's side doorjamb): This will list the transmission type.
* The transmission itself (if you can access it): The case will have identifying numbers cast into it.
* Your owner's manual: If you still have it, this should list the transmission.
Without more specific information about your truck (engine size, trim level, etc.), it's impossible to say definitively which transmission it has.
