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Installed the Range Technology AFM disabler today.

ata3001

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ata3001 Enthusiast

ata3001

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Posted

I installed the Range Technology AFM disabler today. Truck now stays in V8 mode. My truck has never had any issues with erratic or hard shifting. Never any issues with the transmission making clucking sounds, or abrupt down shifts as some have reported. Everything has always worked as it should so no improvement there. There is a distinct difference in how it drives tho. It's just a bit more responsive. After installing it, I went on a short drive just to see how well it's working & a very short test of my mpg with it staying in V8 mode. On a flat stretch of road with a 50 mph speed limit, I set the cruise to 50. The instant mpg scale was registering a steady 29-30 mpg. Haven't yet tried it at higher speeds tho. I drove the thruway last weekend from Butler, PA, (north of Pittsburg) to Buffalo NY with 4 adults, 1 child & luggage for all. Filled up the gas tank when I left Butler. After getting back to Buffalo, I parked the truck until today when I hooked up the 6K lb camper & towed it for 1 hr, dropped it off, then drove home without it (another hr), then filled the gas tank again. Between driving back from Butler, Pa & then towing the camper, I averaged 17.96 mpg. (327 miles & used 18.2 gals of reg gas). The truck mpg showed I had averaged 18.0 mpg. It can't be much more accurate than that! :D

I tow a 6000LB travel trailer & it would go into V4 mode while even towing that weight. I just hope that there are no long term negative effects of keeping it in V8 mode. I am already aware of the problems caused by letting it go into V4 mode. That's why I bought the Range.

Skelly Enthusiast

Skelly

Posted
Posted

What problems are associated with it going into V4 mode?

ata3001 Enthusiast

ata3001

Posted
  • Author
Posted

 

Good read. Thanks. Is this problem anything to do with a "catch can" i've been hearing about that is what some call a must-have with these trucks?

 

I believe so.

TxTruckMan Senior Enthusiast

TxTruckMan

Posted
Posted

Do a google search on GM AFM problems. Here is just one article that basically explains it.

http://partsblog.olathetoyota.com/4920/gmc-chevy-afm-oil-consumption/

That was an older problem with the older engine design. This is a completely new engine and AFM design. There have been zero issues with this version of AFM except for the occasional failed lifter which the Range can't correct.

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