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Old 02-20-2001, 06:55 AM   #1
ImprezedRS
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Join Date: Oct 2000
Location: Charlotte, NC
Vehicle:
2003 BMW Z4
Blue

Question When to change Auto tranny fluid and filter?

I have about roughly 14k miles on my car and was wondering when i should change the tranny fluid and filter. I do change the oil about every 3k miles and was wondering when the tranny fluid and filter be changed and also how about the spark plugs.
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Old 02-20-2001, 10:11 PM   #2
P.K. Motorsports
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1999 RS
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Spark plugs - immediately. You may have Champions.

Tranny Fluid - right away. Use high-quality Mobil 1 or RedLine ATF.

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Old 02-21-2001, 10:34 AM   #3
richeich
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2001 Impreza 2.5RS
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My owner’s maintenance manual says to ‘inspect’ the ATF every 30 months or 30,000 miles (48,000 km). It also has a side note of "When the vehicle is frequently operated under severe driving conditions, replacement should be performed every 15,000 miles (24,000 km)."

My wife’s MY96 Outback was binding in tight cornering situations (parking lots, driveways, etc.), so I replaced the ATF in her car at about 36,000 miles (but it was at 60 months). That seems to have solved the problem. I used Amsoil ATF, but any good synthetic fluid will be an improvement.

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Old 02-21-2001, 01:33 PM   #4
N/A
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If its been a while you could also consider getting the tranny flushed out. Then take the pan off, replace filter(screen) and replace the gasket. Oh yah I saw a tool used for taking of oil and tranny pans before and a few weeks ago I made my own. Later on today or tomorrow I'll post some pics of it. It turned out to work really good.
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Old 02-22-2001, 04:46 AM   #5
philrb
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Draining the pan won't drain all the old tranny fluid out. In order to do this correctly you need to pump it out. To do this the fast, easy and inexpensive way you can either disconnect the tranny return line or cut it in a convenient location (splicing it back together with a piece of fuel hose when you're done). Now get a piece of clear vinyl hose and connect it to the removed or cut section of the tranny line. Put the end of the hose in the jug, prop or have someone hold the jug so it won't tip over. Start your engine and pump out 2 quarts of old juice. Shut the engine and replenish with synthetic juice. Repeat this until you see fresh fluid exiting the vinyl hose. I don't know how much juice this tranny holds but buy 1 quart more than you need. When you're done zipper everything back up, check the fluid level and you're done. Tranny fluid is about the most over-engineered stuff you can buy. If you want use a synthetic fluid as they are even better. If the tranny has a screen, replacing it is a waste of money, if it has a filter, it isn't.
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Old 02-22-2001, 10:38 AM   #6
richeich
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Yeah, I did neglect to mention that I did the flush on my wife's car. Also, the local Subaru dealership didn't have any trans filters. They say that they just clean them when they service the transmissions. Kinda weird if you ask me.

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