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Thread: 6.4 Hemi 2500
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Old 03-03-2019, 10:30 AM   #58 (permalink)
DirtRoads
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Join Date: Mar 2009
Member # 133009
Location: Memphis 10
Posts: 3,315
Quote:
Originally Posted by D45 View Post
You sure about this? Tried to tell my buddy about this and he said it did not work

He is averaging 7.8-8.5 in his 6.4L PW , unloaded
Works on my '16 PW. I'm running 37's and am getting like 10/14 unloaded indicated on the computer. Computer lines up with hand calculated =/- 0.5mpg. That's with a speedo that is uncorrected for tire size, so it's probably actually a little better. I don't drive it very hard.

My understanding is that there is no way to untraceably turn the MDS off permanently. So if you have a warranty, you are going to have to buy a second ECM to swap in when you take it in for anything. It's not like a GM MDS system where you can just get an OBD dongle to turn off the MDS, then remove the dongle to set everything back exactly how it was.

Quote:
Originally Posted by D45 View Post
What trans is bolted up to these 6.4L trucks?

6.4L is only a power wagon and a 2500/3500 motor right?
I think you get the 68RFE. 6 speed auto that seems pretty good in the short time I've had it. I don't know if you can get an Aisin in a 3500/6.4 combo.
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Last edited by DirtRoads; 03-03-2019 at 10:36 AM.
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