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Checking Transmission Fluid - To Wipe Or Not To Wipe

mljenkins

By mljenkins
in Ask A GM Technician

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mljenkins Enthusiast

mljenkins

Posted
Posted

Ok, this is a rather trivial question and I feel silly asking. But, here goes...

 

When checking the transmission fluid level when the truck is in hot, been through all the gears, sat, and then check according to manual, should one take the reading from the stick as soon as it is pulled out ... OR ... should one wipe the stick clean, reinsert, and then take the reading?

 

The reason I ask is when I first pull the stick out there is fluid up to the top hot crosshatch. When I wipe, reinsert, and then reread, the reading is below the cold marking. I want to make sure I really need fluid before I overfill.

 

So, to wipe, or not to wipe ... before reading the transmission dipstick that is?

 

Thanks!

mljenkins Enthusiast

mljenkins

Posted
  • Author
Posted

Ok that's what I thought but wanted to make sure. I'm still not sure how mine ended up low. I had the transmission fluid changed changed at the Chevy garage at 30K and am thinking they may have not have filled it all the way. I'm going to have to get in the habit of checking my fluids more often. I got lazy after getting a new truck in '06. :lol:

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

check it level ,running top of cold ,3 hrs or more is a cold start,hot level is only after a bit of bag drive ,the dealer tech does a bezillion of these services and most likely did not mess up the level, 4 Liter jug does a 60 just right.

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