Yeah I went from a VHO to my Reg. 4wd and the 5.3 with radix pulls my stuff alot better then my VHO. But now I have 7k miles on it the tranny is starting to slip. But I do have 100k warranty since I had the supercharger installed before I even got the truck. I don't know if they will honor it or not, but if not here comes FLT Level5.

 

How would the Radix do on a 3500 Crew Cab Dually 6.0L with a stock 4L80E?

 

IF you are looking for towing power, the radix is your best option. Back in the day when I worked for them, we had a 2003 2500 HD with the 6.0 and 4L80-E. I personally drove this truck over 25K with a 5th wheel trailer weighing in at 11,600 pounds. Through the desert into the rockies, and accross the plains....not one hickup....and trust me I tried to break it

I had the Radix on my truck for 53,000 miles without any issues...and it was raced daily.

 

Good combo, but please keep in mind that e-fans are usually controlled by engine coolant temperature, not IAT. Therefore it is possible (and common) for the engine coolant temperature to be within spec, and the fans to be shut off (or turning very slowly if using a delta controller) and yet the IAT's are going through the roof. Trust me, I learned this one almost the hard way. I would either cool the I/C with a separate fan, or devise some way to turn the fans on full blast while under boost and/or high IAT's.