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Old 04-03-2013, 01:39 PM   #1 (permalink)
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Default Reading atf dipstick?

I am having some issues reading my atf level via the dipstick. It all started when I put in my b&m tranny cooler a couple weeks ago I did a drain and fill while I was in there. Between the cooler and the pan (and what spilled) I measured 4qts so that is how much I put back in. I waited till the next day to let it all drain out of the fill tube for a better reading.
So when its cold first thing in the morning it reads really high like above the hot full mark on the dipstick. So I did what the manual said which was a hot reading because its more accurate. I drove it a couple miles or so and checked it and it was on the full cold mark. I then drove it another 15 miles and checked it and it was on the low hot mark?I figured the added capacity of the tranny cooler was probly the issue so I bought another qt and dumped in 1/4 quart. and I am going to check it hot again tomorrow. Any one else have this kind of issues with the dipstick when its cold its high and when its hot its low?
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Old 04-03-2013, 02:13 PM   #2 (permalink)
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Well did some more reading and found that you must do the cold check with the engine running so that makes sense why it reads high. But I am still wondering why it reads low when hot and if other people have added extra fluid to compensate for the added size of the extra transmission cooler?
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Old 04-04-2013, 10:20 AM   #3 (permalink)
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I checked it today cold with the engine running its dead on the full cold mark maybe a little above. I then drove it running errands for 10 miles or so and checked it hot and its a little over the full hot mark maybe a little less then the distance of the low and full marks or a little over an 1/8 inch above the full, so its probably a 1/8 qt or so overfilled so it should be good to go I would think? What does every one think please I get a little anal and don't want to hurt anything with it being a little overfilled?

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Old 04-04-2013, 12:36 PM   #4 (permalink)
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Provided it was good and hot, parked on a level surface, did the "slowly select each gear position in turn" thing, then yes... I would be happy with that. They build in a little wiggle room as dipsticks are not an exact science.

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