Here is the scoop?.
If your vehicle was produced manufactured prior to and including VIN5GTDN136968105387, when you do a t/case fluid change, you should fill the t/case at the fill hole, and when fluid starts to run out, re-insert the fill plug and torque to 18 lb-ft (25 N?m). Then remove the connector from the speed sensor, and remove the speed sensor, then add an additional 8.45 oz (250 ml) of Dexron III trans fluid into the t/case via the speed sensor hole.
Then re-install the vehicle speed sensor and torque to 13 lb ft (17 N?m), and reconnect the connector.
If your vehicle was manufactured after VIN5GTDN136968105387, and there is a sticker on the rear housing of the t/case that states add extra fluid to the t/case via the speed sensor, then add the extra fluid.
If you vehicle was manufactured after VIN5GTDN136968105387, and there is no sticker on the t/case, and there is a distinctive
BLUE DOT on the housing, then o not add extra fluid via the vehicle speed sensor hole. The fill hole has been raised to allow for the additional required fluid.
Do not confuse the green (or sometimes) blue line that is near where the front and rear cases fit together. This line is added by the person who torques the t/case bolts and is used for quality control to verify bolts were torqued.