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sized up the factory tires--quite a bit...

firstecodiesel

New Member
Nov 10, 2020
2
0
Truck Year
2018
sized up the factory tires--quite a bit..., now nobody (including local dealer) seems to be able to change that "revolutions per mile" factor in vehicle software, (2018 ecodiesel). Shift points and speedo are presumably a little off now. Should this be so hard??
 

Ecopete

Active Member
Dec 27, 2019
166
28
Truck Year
2014
sized up the factory tires--quite a bit..., now nobody (including local dealer) seems to be able to change that "revolutions per mile" factor in vehicle software, (2018 ecodiesel). Shift points and speedo are presumably a little off now. Should this be so hard??
Not at all hard with the proper equipment. Most will suggest alphaOBD app for android or windows as the ultimate Ram friendly program manipulator
 

Tremper126

Moderator
Staff member
Feb 15, 2019
908
331
Truck Year
2014
Eco beat me to it! I believe Alfa allows for up to 35’s but I could be wrong. If you take your truck to dealer after any changes using alfaobd, if they reprogram your rig it will revert back to factory tire size since that is the dealer coding line they have on file.
 

firstecodiesel

New Member
Nov 10, 2020
2
0
Truck Year
2018
Thanks for quick replies,guys.
Starting to hear enough about this Alfa trick... that I might have to just buy one and play with tire sizes-- and probably other stuff, eh?
Do you also, by chance, know where to find one?
 

Tremper126

Moderator
Staff member
Feb 15, 2019
908
331
Truck Year
2014
Alfaobd is an android app, or windows computer downloadable program. It’s 50$ for lifetime access per download. You will also need to purchase a wireless obd interface. I found mine on Amazon for under 30$. EE16EFEE-07BF-4253-B475-991A1580D8FE.jpeg
 

JohnnyMac

Member
May 19, 2019
75
23
Truck Year
2018
For the 2018, you'll need a bypass cable as well.
 
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