It has been along time since I did anything inside a 4l80e but seem to remember the shift solenoids in the early ones and later (94-95) had different resistance solenoids. So the $31 and $OE might not be grounding them properly.
Only the force motor (PCS) changed from 93 to 94-up
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
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