To know for sure, you need to:
* Identify the exact model of both trucks: This includes the engine size (e.g., 4.3L, 5.7L), cab style (regular cab, extended cab, crew cab), and drivetrain (2WD, 4WD).
* Identify the specific transmission in each truck: This will be something like a 700R4, 4L60E, TH350, etc. You can usually find this information on a tag on the transmission itself or in your owner's manual.
* Compare the specifications: Once you have the model and transmission types, you can compare specifications online (e.g., using a parts website) to see if the transmissions are compatible.
Without this specific information, it's impossible to say definitively whether the transmission will transfer. Even if the transmission types appear similar, there might be subtle differences that prevent a successful swap. A mechanical expert familiar with these trucks should be consulted to ensure compatibility.