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Tranny fluid question???

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Old Nov 24, 2010 | 10:12 PM
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Steve/06 Hemi's Avatar
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Default Tranny fluid question???

O.k. i finally got around to changing my transmission fluid and filter. Everything went pretty smooth,got everything back together and started adding the fluid.I figured i add five quarts then start checking the dipstick to see where i was at. Anyway long story short i ended up adding almost 10 quarts 9 3/4 to be exact. Is this a normal amount for just a dropping the pan change and not a total flush? Just seemed like alot.
 
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Old Nov 25, 2010 | 05:38 AM
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normal is about 7-8 quarts. you sure you didnt overfill it? are you checking the fluid level when its hot? cuz you need to be.
 
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Old Nov 25, 2010 | 06:37 AM
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Remember to always have your truck running while checking your tranny fluid.Also their should be a cold level,and a hot level on your dipstick........Oils will expand when they get hot.Make sure your truck is level...If it is overfull,you will have to drain it to correct level,or your tranny will overheat,and blow seals..Thought I could help!
 
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Old Nov 25, 2010 | 02:05 PM
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Yes i know how to check tranny fluid. That's just what it took,added 5 quarts let it warm up then incrementally added 1/2 quarts then checking it.Even took it around the corner after like 8 quarts to make sure it was good and hot. Anyway took it for a drive today and got on the highway then checked it and it was right between the hot marks on the dipstick. Happy Thanksgiving!!!!
 
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Old Nov 25, 2010 | 04:57 PM
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Happy Thanksgiving as well !!!!!!!!!!!!! Glad your tranny fluid checked ok.Eat until you bust.Sometimes being miserable is a blessing!
 
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Old Nov 25, 2010 | 05:46 PM
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Wow! My '02 only took 5.5 quarts. I guess one way of looking at it, is you were able to get more fresh oil in there. Did you drain 8 quarts?
 
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Old Nov 28, 2010 | 06:25 PM
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The top of the two dots for cold on the stick is for 70F transmission oil temp, and the bottom dot of hot is about 130F, while the top dot of hot is about 180F.

There is a chart in the service manual that has the graph of temp vs. fill level, and I just hook up my Super Chips and read the trans temp directly, and add fluid until it reaches the height on the stick the chart calls out.

If you have just driven your truck mildly, come home and fill the fluid up to the top dot on the stick, you will probably overfill it since that dot is for 180F. At this time of year in Phoenix, my trans temp is hovering around 110F after a drive in the city. At 110F, I need to fill to just below the lower hot dot. At mid summer, the same drive might be 160-170F.

I have no idea if overfilling the small amount from just under the lower hot dot to the upper hot dot will cause any long term issues, but I would guess not. With the longevity issues know about these transmissions, I would err on the side of under filling just slightly rather than overfilling and risk forming air bubbles in the fluid.
 

Last edited by ramjamhemi; Nov 28, 2010 at 06:27 PM.
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