RE: Diagnostic Code P1739
I suggest that an accurate diagnostic be done according [no pun intended] to the service manual procedure for the code.
The fault might lie with the control unit, internal transmission faults, or wiring.
Those transmissions have a bad reputation for eating up the differential bearings and throwing metal shards throughout the trans; first sign of that is seals seeping at the inner CV joint.
93 Yota T-100 155k miles. 3.0 "born to die" engine
92 Acura Legend 135k miles. Wife lets me drive it for oil changes.
The one eyed Mechanic says "The fluid is low"; The two eyed Technician says "WHY is the fluid low?"
Been There, Done That, Read the Book, Seen the Movie, Got the T-shirt