i have a 2002 dodge 1500 4x4 quad cab with the 4.7 i am putting in a 5.9 from a 2001 dodge 1500 hundred i can start it an it runs but sounds like a clunker i am having my dash light problems rough idle an every light is on in the dash fuel guage not working nor any thing in the dash i can pull it forward an backwards but real rough sittin idle i aint got a clue do i need to switch out any sensors, on the 5.9 with the 4.7 to allow this engine to work i have not switched none of the sensors only thing i did was throw the 5.9 in an hook up what was on the engine

 

If you are still using the PCM from the 4.7, that's gonna be your biggest problem...... it isn't going to have a clue what to do with the 5.9. Sensor values are probably different, among other things......

I am not entirely sure what all you are gonna have to do to convince the cluster to do the right tricks though.... best bet would be to get a service manual for your truck, and grab the 01 service manual from the faq section here, and start looking at differences in how the two trucks do things.

 

Might be as simple as having the PCM flashed at the dealer.

 

I have a pair of 2001 Durangos.

Car 1 is in great shape, but has a blown 4.7 engine and tranny.

Car 2 is in horrific shape, but has a recently new 5.9 and good tranny.

Both cars are identical and complete. The only difference is the engine and tranny, so no extra parts are needed.

Here's what I know. The PCM and TCM need to make the journey along with the engine and the PCM needs to be reflashed with the VIN# of the recipient car.

Here's what I don't know.

Is there a common point in both cars where the engine wire harness can be swapped? Are the driveshafts the same? If not, will the driveshaft from the donor car with the 5.9 connect up with the rear end in the 4.7 car, or does the differential need to be swapped as well? Will the exhaust manifold on the 5.9 bolt up to the exhaust system in the 4.7 car or do I also have to swap the exhaust system?

I've read through some posts on this topic already so I'm well aware of the disdain by some for the 5.9. While I appreciate the knowledge, I simply need straightforward answers to the above questions. The only way I'm not going to do this swap exactly as described is if it's physically impossible.

Thanks!

 

I left out a couple of relevant details. Both are 4x4 and yes, the transfer case will be swapped as well. The trans`axles are good on both

I assume the sensor connections to the tranny are the same?

Thanks again

 

You have all the parts you need to do the swap. Just take the complete drivetrain from one, (except axles) and stuff it in the other one. You will have to swap over the engine harness, (which should include the trans harness as well) and PCM, there is no TCM on the 5.9/44RE trans. You will have to go exploring to see where you can break apart the harness..... May have to re-pin some wires in a couple connectors, not entirely sure. You *might* get lucky, but, don't hold your breath on that.

 

Thanks for the info.

Is there anyway (or anyone who knows for sure) I can get a definitive answer on whether or not repinning will be necessary.

Regarding the axles. Can you clarify? I assume you mean the axles have to come over from the donor car.

Regarding definition of entire drive train, would this include the driveshaft and differential?

How about exhaust connection to the exhaust manifold of the 5.9 to the existing exhaust system in the car with the 4.7

Thanks in advance.

 

Engine, trans, t-case, driveshafts. They *should* bolt right up to the existing axles. You may have to change the yokes on the axles, but, I doubt it.

You are going to just have to taste an see as far as the electrical goes. On your donor truck, just check the connectors at the PCM, and see if there is a separate connector where the harness goes into the cabin. If there is, it's likely going to be simple. But, even if you have to repin a connector or two, you can get the right tools, and the job becomes easy. Still tedious though.

Exhaust? Ooops, forgot about that. Good time for shorty headers, and new exhaust?

 

Nope. Gonna keep this simple. If necessary will bring over the exhaust from the donor car.

Regarding pinning: Are you referring to color coding of the wires? Just compare receptical on donor car to recipient?

 

I don't know if some of the connectors have both engine compartment, and cabin wiring stuffed into them. So, in order to swap over, you may have to change some wires in some connectors, to accommodate the different motor. I just don't know.

Likely you will need to exhaust to swap as well then...... That should be fun.