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Checking tranny fluid when cold

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Old Aug 17, 2009 | 02:31 PM
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Checking tranny fluid when cold

I've given up on checking it hot, it never reads the same thing twice. So i'm going to try it cold. Do I need to start the engine and let it run, or check it with the engine off?
 
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Old Aug 17, 2009 | 02:34 PM
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Brandon, you need to do the dip-stick read 5 times in a row, one after the other to get an average. Then go with that. Yes the truck has to be on when checking the fluid, also have it at operating temp.
 
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Old Aug 17, 2009 | 02:50 PM
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Good info, I didn't know the truck needed to be running.
 
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Old Aug 17, 2009 | 02:58 PM
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Originally Posted by redfire42
Good info, I didn't know the truck needed to be running.
It usually is stamped on the dipstick itself- it will say to test it hot, with the engine idling and the trans in park or neutral depending on the rig.
 
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Old Aug 17, 2009 | 03:02 PM
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Originally Posted by superduty4x4
It usually is stamped on the dipstick itself- it will say to test it hot, with the engine idling and the trans in park or neutral depending on the rig.

Thanks! I must have never seen it there, have to go look now..
 
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Old Aug 17, 2009 | 03:05 PM
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Why couldn't it just have a fill plug? Ist time I checked it, before wiping the dipstick off, it was full. I wipes it off and checked again and it was in the cold range. I added about 1/4 of a quart and checked it again and it was just a little over full. I think i'll just leave it alone
 
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Old Aug 17, 2009 | 03:06 PM
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I don't know of any auto trans that you can check the fluid while the vehicle is not running.
 
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Old Aug 17, 2009 | 06:32 PM
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I checked it 1 more time and it is in the middle of the"c" with the engine hot. Will it hurt anything to run it there? I don't want to overfill it.
 
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Old Aug 17, 2009 | 08:56 PM
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Originally Posted by miller_feed
Brandon, you need to do the dip-stick read 5 times in a row, one after the other to get an average. Then go with that. Yes the truck has to be on when checking the fluid, also have it at operating temp.
Ricks got the way to do it!!
 
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Old Aug 17, 2009 | 10:50 PM
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Oh if it were only that simple. Mine goes from overfull cold to low when hot. Mark has opined here and I just am not sure. I am hesitant to add more.
 
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