* Engine: The transmission must match the engine. A transmission from a V6 won't fit a V8, and vice-versa. Make absolutely sure the engine in both trucks is the same.
* Transmission type: Even if the engines are the same, there might be different transmission types (e.g., 3-speed automatic vs. 4-speed automatic, different variants of the same number of speeds). The exact transmission model numbers need to match or be directly interchangeable.
* Transfer case (4x4 models): If both trucks are 4x4, the transfer case compatibility needs to be verified. They might not be directly interchangeable.
* Other drivetrain components: The output shaft length, bellhousing pattern, and other drivetrain components need to be compatible.
In short, while it *might* work, you can't assume compatibility just based on the year and model. You must cross-reference the specific transmission part numbers from both trucks. A parts store or a mechanic specializing in Dodge Rams will be able to help you confirm compatibility using the Vehicle Identification Numbers (VINs) of both trucks. Trying to force an incompatible transmission can cause serious damage.
