The NP271 and NP273 are used in both Fords and Dodges pickup trucks and known for their size and strength. The 271 is manually shifted and the 273 is electronically shifted.
Since the New Process 273 is an electric shift transfer case it has a shift motor or an actuator which means it has a harness to supply electricity and information to the vehicles computer. It is possible for the connections to have moisture issues if submerged in water and should be checked for oxidation, rust and other related issues.
The front drive shaft is a common cause to a broken front case half. A worn cv joint in the drive shaft causes it to spin with a whipping action that can result the case to break. If repairing or maintaining the unit inspect the cv joint, mounts and cross member to make sure all are in good working order.
Although there are many similarities in this transfer cases differences do exist. If a case half needs to be ordered, locate the casting number in order to determine the correct part number. Bearing kits and seal kits are different for the Dodge (BK485A / TSK273D) and the Ford (BK485 / TSK273).
And if you need to replace the case in your Ram 2500, 3500, F250, F350 or F450 with a reman unit, we can help with that too.
Posted by CobraTransmission.com at Friday, July 22, 2016