What cummins motors will fit in to a 2005 dodge cummins?

The 2005 Dodge Ram uses the ISB Cummins engine (5.9L). While it's *theoretically* possible to swap in other Cummins engines, it's a significant undertaking and rarely straightforward. The fitment depends heavily on the specific engine (ISX, ISC, etc.) and the body style of your 2005 Dodge Ram (single cab, quad cab, etc.).

Here's why it's complicated and what to consider:

* Engine Size and Mounting: Different Cummins engines have drastically different dimensions and mounting points. Simply bolting in a different engine is unlikely without significant modification to the engine bay and potentially the frame.

* Transmission Compatibility: Your existing transmission likely won't be compatible with another Cummins engine. You'd probably need a different transmission as well, which adds considerable complexity and cost.

* Wiring Harness and ECM: The wiring harness and engine control module (ECM) are engine-specific. A completely new harness and ECM would be needed, requiring extensive electrical work.

* Exhaust System: The exhaust system will almost certainly need replacement.

* Driveshafts: The length of your driveshafts might be incompatible with a different engine and transmission combination.

* Cooling System: The cooling system might need modification or replacement.

In short: While *some* swaps are possible, it's a very complex and expensive project requiring significant mechanical and electrical expertise. It's far easier and cheaper to rebuild or replace your existing 5.9L Cummins ISB engine. Focus on finding a rebuilt or used 5.9L ISB if you're looking for a replacement engine for your 2005 Dodge Ram.