Rebuilding and tuning a 4r100 behind a commonrail

[wsnell_fab]

I am in the process of swapping a 2003 commonrail cummins engine into my superduty that came with a 7.3 and a 4r100 transmission. The transmission worked great behind the 7.3, but has 205,000 miles on it and I would like to rebuild it and make it work great and feel strong behind the 5.9 commonrail engine. The catch is, i'm on a budget and cannot afford the absolute top of the line. I am going to tear this transmission apart and rebuild it myself. What would you guys recommend as a great middle of the line competitor that supplies a good kit and maybe a torque converter if I can afford it right now? My power goal is around 400 or 450 right now for the engine. Mostly just a tuner on the engine, maybe marine injectors at some point, and maybe a turbo setup of some kind but nothing crazy, I just want good reliability and driveability. I also need to decide on a good standalone controller, I know everyone like PCS controllers, but another option I have been told about is the Quick 4 controller? The Quick 4 seems to be very easily tuned and works with the stock pcm so your towhaul button still works, and the whole thing feels very stock, but with good tunability. Has anyone had any experience with it? If more information is needed for a good answer just let me know.

 

[sootie]

I am in the process of swapping a 2003 commonrail cummins engine into my superduty that came with a 7.3 and a 4r100 transmission. The transmission worked great behind the 7.3, but has 205,000 miles on it and I would like to rebuild it and make it work great and feel strong behind the 5.9 commonrail engine. The catch is, i'm on a budget and cannot afford the absolute top of the line. I am going to tear this transmission apart and rebuild it myself. What would you guys recommend as a great middle of the line competitor that supplies a good kit and maybe a torque converter if I can afford it right now? My power goal is around 400 or 450 right now for the engine. Mostly just a tuner on the engine, maybe marine injectors at some point, and maybe a turbo setup of some kind but nothing crazy, I just want good reliability and driveability. I also need to decide on a good standalone controller, I know everyone like PCS controllers, but another option I have been told about is the Quick 4 controller? The Quick 4 seems to be very easily tuned and works with the stock pcm so your towhaul button still works, and the whole thing feels very stock, but with good tunability. Has anyone had any experience with it? If more information is needed for a good answer just let me know.

I would recommend running a pcs. You will need a better converter than stock right off the bat. If you want to buy some time with the trans and it isn't hurt at the moment, get a John woods or bts valve body and triple disk converter. That will last a while at sub 450hp. Save up for a full trans build down the road.

 

[Gorrila550]

At least get a quality towing converting they should be fine my friend couldn't kill the stock replacement converter in his truck and he hauled a 38,000 gooseneck trailer with about 500hp 7.3. Also check the belleville springs closely as they crack and fail under abuse. Built two transmissions because of them failing.