Firecracker392
New member
I have a Moab 392, just put 37” Mickey Thompson A/T’s on with 1” Teraflex spacers on all four corners. Jeep dealer says the software update for tire size correction will not install and is a noted problem. Any advice?
Software update for 37s
- Thread starter Firecracker392
- Start date
Overkill
Well-known member
- Dec 11, 2023
- 287
- 459
- Current Rides
- 2024 Jeep Wrangler Unlimited Rubicon 392, 2002 Jeep Wrangler Sport, 2005 GMC Sierra 2500HD, 1969 Chevrolet Camaro (1), 1969 Chevrolet Camaro (2), 1974 Chevrolet Cheyenne K20, 2022 Lexus RX350L, 2008 Sand Rail
You could try the Z-Automotive Tazer JL Mini or the JScan tool to see if one of those lets you adjust the tire size.
Florida-Man
Active member
Yes, it's a known issue.... the DASM module needs to be updated first (on certain 2025/26 JL), and only then the new tire size can be updated using a tool like Tazer or ProCal. To update the DASM module, you need to go to dealer and ask them nicely to update it. They may try to charge you 30 mins labor ($125) since the need for the update is YOU changing your tire size (even though it was their effing defect!)
. I was nice to the dealer and they did it a s a courtesy. When I got home the new tire size programmed in via Tazer with no issues.See AEV's notes here:
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