While driving transmissions shifts in and out of four wheel drive

99,000 MILES • V8 • 4WD • AUTOMATIC
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KC29
  • MEMBER
  • 1 POST
shifts in and out of 4 wheel drive when driving.
Jun 13, 2020 at 8:31 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon,

Can you check for any codes in the system? It sounds like either the module or the shift motor is the issue.

The module is the GEM module or body control module.

I attached a wiring diagram for you to view. I would disconnect the motor on the transfer case and see if it still happens.

https://www.2carpros.com/articles/how-to-check-wiring

Roy
Jun 13, 2020 at 9:27 AM
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