like i said before after a certain speed the fan has NO effect on cooling.
i say get the 05+ efans.

I recently pulled my jeep down to TN and goin up the mountian had to geter down in 2nd doin about 55mph for 2-3 miles and the temp never got off 190 (via aeroforce) but the trans temp...thats a different story lol

 

The stock trans cooler does well, it never gets near the red, but it will climb a little when the converter stay unlocked a long time, (trying to get a tuner to take car of that)

there was a time i drove to salt lake city in dec, 12* - 20* out, at hwy speeds the trans temp was at the bottom of the gauge


ok so where do i go about getting the 05 + fans from???
WHat all am i looking to get to make it work?

 

I got mine from G&R Auto Parts .com, but last I checked they didn't have any on their website. You could also check CarPart.com, the classifieds here, and ebay. To make them work you'll need a fan harness which you can buy or make yourself, I have the Nelson Performance harness and it works great. You'll also need to have the PCM tuned to turn the fans on and off which you can do with tuning software such as EFILive or HPTuners if you have it, or one of our sponsors such as BlackBear, Wheatley, or Nelson can do it for you along with a nice custom tune The 05 efans require a 34" radiator which you should already have since you have a 6.0 HD.

 

first, i want to ask about your tranny temp, how high does it get while pulling up that grade?

and on the questions around here, i was one that used to have issues with my efans while sitting in traffice with the a/c, my temps woul climb up to 220 pretty quick and i always had to turn off the a/c until i would get back up and rolling, then once i put the clutch fan back on everything would be ok? both were with a 160 thermostat.... then i found my problem.... i had an AIR POCKET in my coolant system! yup, that will give people hell if its not done properly..... now i still have the clutch fan and can sit in traffic with the a/c and it will run around 200-203...

something for yall to think about, make sure your coolant system is bled right...

also, i dont think its worth the swap for the little horsepower you get out of it...

im thinking about doing a baby cam swap on my 2500HD, something to gain 20-30rwhp on the low end 2000-3500rpm...

 

Not sure...the MOST it has ever been was 250...drove about 20 miles into a bad head wind with the trailer... couldn't hardley get the converter to lock...

 

Which is better? the 05+ OEM Fans 34" or the flex a lite fans for the 34" Rad?

 

I always figure that for this kind of stuff, OEM can't be beat.

 

That was the exact problem i was having. I have always had over heating problems with this truck and I thought a 160* thermostat would cure it. Well over time i noticed it just made it worse and i wondered why it was climbing so much. Well i put the factory thermostat back in and now it doesn't do it anymore. When the a/c is on it starts to climb to 210 or a little above but once i start moving it goes back down. This is with the expensive *** flex-a-lite e-fans also.

I say just upgrade to the 05+ radiator/e-fans... its what im saving up for so I (hopefully) wont have these problems ever again.

 

For you guys running the factory stat and efans, what are you setting your fan on/off temps at?

 

I got the nelson harness... I believe my fans come on at 180*. Also got a switch to flip both of the fans on high if needed