Not familiar with the AWD version. Is it possible something seized up in the transfer case? When you have it up on jacks are you able to spin any of the wheels, if one spins does it turn any of the other wheels? Although unlikely, does the linkage between the shifter and transmission work ok?
I hate to think that a shaft or part of the banding came apart. If you have it up in the air, after checking what you can mechanically see, CV shafts, rear drive shaft, bearings. Check the transfer case oil
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The lack of brake lights may indicate an electrical issue, since they should work regardless what gear the Vibe is in. Possibly electrical harness issue, where the speed sensor etc is not getting signal causing transmission issues? Do the other electrical items work fine, all gauges, windows, door locks, interior and exterior lights?
2005 #10,524 Neptune Vibe "Bandit" Auto, Moon & Tunes 238k
1991 Pontiac Bonneville 3.8L "Granny's Whip" 142k (33nd Anniversary
)