Quote:
Originally Posted by ARunner
Great information. I'm unread with regard to the transmission fluid change and all that is associated with getting it right or wrong, so I apologize in advance if this question is obvious.
Is there a clear definition of what temperature is the right temp for fluid to begin to exit the overflow hole? Reason I ask is "operating temperature" of my transmission as revealed via Scangauge seems to vary widely. I've seen it as high as 180 and on cooler days be in the 120-130 degree range. As we go into the cooler season it might even be lower. I would imagine this line on the graph would stay linear and therefore the fluid would continue to rise as temperature of the transmission rises, thus my confusion about what temperature to validate the overflow hole at and/or what is considered "operating temperature".
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Not exactly sure what you're asking but the temperature range targeted for checking the transmission fluid level is 97-115F.
If you pulled the overflow plug when the fluid was hotter than that, yes, too much would flow out.
For the most part, if you simply drive the truck until the
engine coolant comes completely up to full operating temp and then let the truck idle and pull the overflow plug, everything takes care of itself as the
transmission fluid should be very close to the lower end of the 97-115F range at that point.
Not a bad idea to let the truck idle for an 5 extra minutes or so, for good measure, and that gives you time to move the shifter through the gear range.