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Old 04-30-2011, 08:12 PM
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brass filter vs paper type

I know that the brass filters are suppose to flow more, but will that increase line pressure? I read somewhere that race trans (which this is) should have brass filters. Reason I ask, is because today when I replaced my th400 rear seal that was leaking, a ton of fluid came out due to the fact I over fill it. I over fill the trans because it wont shift hard/correct when fluid is at stock level. I was thinking more fluid in it, more pressure, harder shifts? I want to start with a brass filter before I look at possible pump problems.

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Old 04-30-2011, 08:50 PM
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Hi
overfilling the trans isn't a good idea, it won't increase the pressure, however it can froth up/air bubbles & air bubbles neither lubricate or transfer power well. The brass filter won't increase pressure either, it will flow more due to the micron size.
Check the line pressure.
Rich
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Old 04-30-2011, 09:12 PM
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well maybe i need more flow than? I just know when I over fill the trans, it shifts correctly. Not enough trans fluid will cause it to shift late and soft, and one time after a long drive, it 1st gear wouldnt engage. I also see no bubbles on the dipstick.
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Old 04-30-2011, 09:29 PM
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I wonder if it really is being overfilled, it may not have the correct dip stick or may be incorrectly marked. Because beside what was mentioned previously, the fluid can puke out the fill tube & vent, out the vent isn't to bad but out the fill tube is dangerous ATF flashes at about 350* exhaust manifolds can be several hundred degrees hotter then that. just something to think about.
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Old 04-30-2011, 09:35 PM
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last year at the big car show, i over filled it too much and had problems on the way home. Leaked all over my right 3 inch exhaust and smoked a little. I bet it was pouring out my vent, but since I only have a mild 327, the oversized 3 inch dual exhausts dont get as hot as lets say a dual 2.5 or single exhaust. Also, I can see the base of my filler tube where it goes into the trans, that has not been wet at all.

Also, should it really pour out the back when the rear seal is removed. I know the rear seal sits higher than the pan. Today on the lift, the truck was leaning toward the back a little, so i figured more trans fluid came out than if it was sitting level. I probably lost 1.5- to almost 2 quarts when rear seal was removed. Again, it was sitting at an angle.

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Old 04-30-2011, 10:02 PM
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Yes it will pour out, when the engine isn't running the fluid level in the trans is over the top of the pan.
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