Q: Q: Engine swap!

asked by on

I have an 02 ram 1500 quad cab, 8 foot bed with the 5.9 hemi 4 speed automatic. I really want to put a 4.7 v8 and a 5 speed automatic in it. Is this plausible?

My car has 143000 miles.
My car has an automatic transmission.

The main problem in such a swap is the engine computers for the two engines you are referring to are not interchangeable. And, you cannot flash re-program your existing computer to work with the new engine because the two use different computer hardware (physically different PCM’s). In addition, the wiring harnesses are completely different, and the TCM (transmission control module) will have to be completely changed as well. As if that isn’t enough, it would seem to me unlikely that if, and once, you substitute a new PCM and TCM that it will all work seamlesly, if at all, with the other computers on the vehicle such as the body control module but there are many other microprocessors involved as well. In the modern era, really the only way swaps like this can work is if you literally carry over all electronic controls and wiring that are associated with the engine to the vehicle. Obviously, that makes it very impractical and so few people do it. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Engine swap!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car acts like it’s about to die.

If you have a battery that is on the verge of going bad and is only at 79% then what can happen is you could have the other electrical loads cause erratic operation at lower engine rpms. If you have...

Q: Ran out of gas and put in diesel by mistake. Dealership drained the gas and changed the fuel injectors. Then they cleaned the system and now it has lost compression.

Hi there. Take a compression gauge and put it into the spark plug holes and remove all the other spark plugs. Then disable the ignition power to the coils. Then crank the engine over with the throttle open all the...

Q: Check Engine Light - 200 Dodge Durango

When the Check Engine Light is illuminated and you’re able to download the P0601 OBD-II error code, it typically indicates that the internal control module within the ECU is either faulty or not receiving correct data from the transmission, ABS...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.