Mine is a 4 spd trans and I believe could benefit from the jeep controller. Only thing I might have an issue with is the 50 mph lockup of the TCC.

What upgrades are there in the 2004 controller?

Before I do anything, I need to baseline the truck to know where I am at, not there yet but working on it. I'm hoping to get the cooling system dialed in this weekend, new hoses & t-stat. Then swap over the tires to the oem wheels and fit them to the truck. Will do a few turns on the bars to lift the front a tad bit which will be counter productive to mpg goals but, 265/75-16 tires are all over the place and I snagged a fairly new set of used ones for $400. I need all that in place before I can do the baseline. oh... and, I need to fix a vacuum leak(s) and get no more CE lights. I am aware of one hose that needs attention, the others seem OK. Hoping thats the last of it but wont be surprised if its not.

 

I don't know what the updates on a 04 TCM where exactly, but seems to shift smoother, minor changes i will think.
Most of the users on the forums around don't have any issues with older ones, but i can imagine there were a few update / flashes over the years from factory.
So if i could find one of 02 or 04, i would take the 04, because it has probably the newest software flashes.
Just look if you have the seperate PCM and TCM module, you only need the TCM module to change.
It will work on a 2001 and 2002, because after those years they changed to the combined PCM/TCM module and you have the 545 allready.

 

yeah they are separate on my truck, already looked into it.

I'm wondering what might be a realistic mpg goal for this truck... my last dak I was able to squeeze 17's out of it but I knew nothing about what it takes to get the most out of it.

For comparison sake... the Ram will get 22's all day long, 23's in the peak temps of mid summer and should definitely be above 21 thru winter. if I could get the dak up closer to 20, that would be awesome. I dont think its going to be realistic to get it up that high since I am going to a heavier 32" tire and am planning a nv242 transfercase swap

I'm thinking of this approach when ready to mod:

• Aero mods 1st
  • 2nd air dam
  • upper bed seals
  • look into managing airflow into the engine compartment
  • solid tonneau cover
• Cooling mods
  • Ditch the fan clutch
  • Ditch the OEM fan for a volvo
  • Create a custom shroud for the volvo based on the airflow into the engine compartment and cooling needs
• Engine mods
  • Install "torque tube" into the throttle body (I think Airaid makes one)
  • Modify the stock air box to better control the flow thru it
    • Install a vacuum controlled exhaust dump on the side
  • Fuel cooler
  • Insulate the fuel rail
  • IAT sensor relocation (I believe there is a different spot for it on later trucks and someone makes a harness extension)
  • Investigate exhaust setup, probably no changes as anything bigger loses part throttle low end torque (keeping that part throttle torque high is the goal)
• Engine tuning
  • Have no idea how to tune a gasser so it will be a learning curve (diesels, yeah easy peasy)

 

i did read you're post on the taurus and volvo fans, but even though you made you're measurements i still have my doubts.

i have looked into this thread, lots of info on fans : https://www.240turbo.com/ElectricCoolingFans.html

 

I saw that thread when working on the fans way back when... the volvo fan being a bolt in design was the appeal. The fan they displayed in the link, that one was the one that drew 200~300 cfm less than the straight blade fan.

I was in the middle of a fan controller project when covid hit and it is still sitting idle. Setup an arduino to generate a PWM signal to the fan to control fan speed. ON the fan I was using on the bench, the controller setup worked well. Just need to encase it, tap into the temp sensor and add it onto the shroud.

Whatever fan you pick, grab a volvo out of a wrecking yard and compare them side by side on high. I think only the Taurus and the Mk 8 (?) fans would draw more. If worried that your gonna overheat with an e-fan, keep in mind that guys are running around w/o the fan clutch and were doing fine. With you towing, I will bet the volvo should still be enough. I still have the fan test chamber sitting in the garage, I may just put it back together and test the Dak fan for comparison sake. That would be an apples to apples comparison. Answer is always in the data...

 

Yep that's true, but like you said i'm a little afraid of deleting the clutch fan entirely.
The Volvo fan ( angualar one 850 ) would be an option, but also the jeep grand cherokee fan, they are 18 inch and available too over here.
Because of that 18 inch i would try that fan setup, other options i could think off in my situation is a dual fan setup from an European car at the junkyard.

 

Do what others have done, pull the clutch and go run it. Leave the clutch handy to pop back in if you get in a jam. When I first pulled the one on the Ram, I ran 2~3 months IIRC w/o a fan at all, just the airflow thru the front. Granted it was winter but the flow was more than enough to keep it cool under daily driving conditions.

Which jeep did the 18" fan come from? Curious to have a look at the fan blade design

 

The above radiator fan is identified as PN 52079528AB. It's reportedly an 18 inch cooling fan used in a Jeep/Chrysler/Mopar with 4 liter and 4.7 liter V8 and 3 liter diesel engines.
There is also an aftermarket fan, Dorman PN 620-010, that appears to match this Jeep part number.
So it has the S-blade style, i just don't know for sure if it's a stand alone fan setup, without the clutch fan.

 

i would go to rockauto.com and look up a 2016 ram 1500 ecodiesel and see if there is a fan clutch in the cooling section. you may also find that part number fan listed under there as well.

 

Confirmed it goes on the 4.0, 4.7 & 3.7 jeeps...
https://www.rockauto.com/en/moreinfo...sn=819&jsn=819

This aftermarket replacement says cfm is 1375 cfm...
https://www.rockauto.com/en/moreinfo...956054&jsn=824

I poked around on rockauto.com and could not find out which model it was on...

and the volvo fan from a 1997~1997 850 model
https://www.rockauto.com/en/moreinfo...=2181&jsn=1288

These guys claim 1810 cfm for this volvo replacement, they dont specify 2 speed though, it also indicates a curved s-blade though. I know that one for sure flows less than the one in the pic in the link below.
https://www.rockauto.com/en/moreinfo...=2181&jsn=1287