serv 4wd error when in 4lo

[homebrewer]

I just regeared to 4.88s on my JTSD with 37s. First drive I shifted into 4lo to make sure everything was okay and this message immediately appeared. All wheel speed sensors are plugged in. The FAD is plugged in. The message does not appear in 4hi. I'm thinking this is a transfer case motor (I manually shift it so I've no idea where there would be a motor on my transfer case)? Anyone have experience with this? 2022 with 5k miles.

edit: I scanned teh ecu using an actron scanner and there are no codes even though the "serv awd" warning is there.

Kinda starting to sound like an electrical gremlin from one of the batteries being dead. This did just sit for 3 weeks.

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[MoxiesDad]

I remember reading about this several times in the past from people who just regeared. I believe the fix was to reprogram the correct gear ratio and tire size parameters.

 

[homebrewer]

Yeah strangely it didn't happen when putting bigger tires on, but I guess going the opposite directions may cause issues?

 

[homebrewer]

Ah I see that changing the gear lower does not affect how the computer is reading the wheel speed sensor AT THE WHEEL so it gets confused.

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