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2000 Lifted 4x4 Astro 92 V8-350 Shorty
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The front differential is an "open" differential and is completely disengaged in 2WD mode.
There is zero interaction between them in this mode.

But your front wheels (on the ground) are STILL technically turning the differential (regardless of model TC), so if the differential has issues, then there would likely be driving issues
 
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