How to check a level of transmission oil?
The engine must be running when you remove the fill plug and you must move the gear lever slowly from P through to D a couple of times and back to P just prior to the removal.Assuming it is no different than my 2010, you have to have the truck parked on a level surface, get the transmission fluid heated to about 40 deg C, but no more than 50, and then pull the fill plug. If fluid just barely dribbles out, you're filled correctly. If you get nothing out, fill until you get that small flow out. If it comes gushing out, too much.
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