I've looked at user manuals for the following tools from Harbor Freight:
Cen-Tech Deluxe OBDII Scan Tool (Item 62119) $49.97
Zurich ZR4 OBD2 Code Reader (Item 63808) $44.99
Zurich ZR8 OBD2 Code Reader with Live Data (Item 63809) $84.99
Zurich ZR11 OBD2 Code Reader with ABS (Item 63807) $139.99
Zurich ZR13 OBD2 Code Reader with ABS/SRS/FixAssist® (Item 63806) $189.99
None of them appear to have a PIDs for transmission fluid temperature. Which one do you have?