Milly
Active Member
- Joined
- Sep 2, 2024
- Messages
- 44
- Reaction score
- 36
- Points
- 18
- Age
- 37
I used Jscan $20 for license, a $20 bluetooth obd2 adaptor, and a $15 security bypass cable. I can add to the conversation here that after adding bigger tires it is essential to update the ecu with the correct size. I actually programmed mine a few times (can adjust by 0.25” increments in the ecu) to get it dialed in perfect. Now it actually shows 75 at 75 gps. I ran 33” tires for about six months without updating the ecu and it worked but the shift points were messed up especially when towing it literally wouldn’t stop hunting for gears, it was absolutely terrible towing. After updating the ecu to correct size it fixed all the shift points, tows normal again and increased fuel milage slightly. I have the 3.21 gears and it works fine. I have no doubt 34 or 35 would not be a problem if the correct value is set to the ecu. The computer needs to know the correct size to calculate correct powertrain outputs. Also for the record the max size the factory ecu will accept is 44”
Curious, did you use Jscan on your phone? Apple by chance? I just got my 2024 and trying to figure out the best way to update tire size.
