Speed and Gear ratio programming for larger tires

[G Mcpherson]

I have made errors a couple of times using Alpha that created codes that I could not clear on a couple of different trucks. Went to the Dealer and had No issues getting Re
Flashed to correct things. Service Writer was very good with everything.

 

[Jimmy07]

I have AlfaOBD and AEV ProCal SNAP.

The advantage of the ProCal SNAP is that it will not void your warranty. And besides adjusting tire size you can also adjust TPMS settings.

The comparison is moot, since both devices are changing the exact same thing in the BCM when they adjust tire size and tpms. So, if the claim is that procal won’t void warranty, then that would also mean alfaobd won’t void warranty.
But, we all know when manufacturers make those claims, they’re ultimately meaningless.