* Flywheel and Bellhousing: You'll need the correct flywheel and bellhousing for whichever transmission you choose. The flywheel and bellhousing for a ZF5 are different than those for an E4OD. Using the wrong parts will prevent the transmission from bolting up.
* Wiring and Electronics: The E4OD is electronically controlled, while the ZF5 is mostly mechanical. Integrating the E4OD will require the correct PCM (Powertrain Control Module) and wiring harness to function properly. The ZF5 will have simpler integration, but may still require some wiring adjustments depending on the donor truck's configuration.
* Driveshaft: The driveshaft length will likely need to be adjusted or replaced depending on the transmission and any modifications to the vehicle.
In short, while the engine itself is compatible, the supporting components must match the intended transmission for a successful swap. It's not a simple bolt-on affair. Careful planning and sourcing the correct parts are crucial.
