Hi guys , i have an 04 short box 4.7 manual tranny ram , it has a cold tick but still runs good.... been thinking about swaping for a 5.7L but unsure of compatibility . Does anyone know what year if any of the 5.7L engines would bolt up to my manual tranny ? would i need to change mounts and computer or any wiring ?

thanks

 

I think it would bolt up, but most will tell you that it can't handle the hemi. I know of some Jeep guys that have been running manual hemis without problems, but they are using GETRAG 238s, which you can find in 05-08 (I think) 4.7 Rams. I've heard that you would need to change your clutch and cylinders to the ones that the 2500 Hemis use.

Once you get past that point, you have a little wiring to figure out with the transmission. I think 2005s and above go into limp mode with the absence of the auto trans. You'll need a Hemi PCM and you can have someone remove the auto trans from it.

As for the rest of the swap, yeah a ton of stuff. Engine mounts, wiring, computer, bunch of hoses, etc. There are a few threads on here about 5.7 swaps, mine is here: https://dodgeforum.com/forum/3rd-gen...003-5-7-a.html There are also a few threads on manual trans with hemi, but no final outcomes that I've seen.

 

Thanks man , informative link on your swap ..... its just a thought for me at this point , if i find a decent price sometime on a good working 5.7 i might attempt this swap ....if i do i'll post finding/progress ...thanks !!!!!!

 

A 2003 Motor and ECM should work. They came with seperate Transmission computers. OR When you get a Motor Pull it from a stick shift truck and get the computer with it..T- is right -The 4.7 and Hemi Trans have the same bolt pattern. When the 4.7 expires. Swapping it over to a Hemi is probably going to be cheaper than getting another used 4.7..I'm with T- I think you'll be fine using the Trans you have..

 

I did the swap, with a/t wiriring harness im stuck if u find out how to do it let me know i love standard.

 

Hey Brand , What year harness and computer did you use ? And how are you stuck ? What's going on with it ?

 

the harness is from an 03 5.7 1500 p/u 4x4 a/t my truck 03 4.7 p/u 1500 4x4 m/t did the engine swap had to ground a gr/or wire to get the ignition to work have spark fuel pump kicks on ,when i pour gas in throttlebody truck starts i changed the cranksen but injectors still arnt workin. PLEASE HELP thnx