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Old 09-20-2004, 02:58 PM   #1
teamtruett
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Default Manual tranny fluid: When do you change it?


When if ever should you change the fluid in a manual tranny? What weight should I use. Also is synthetic recommended?
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Old 09-20-2004, 03:36 PM   #2
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ATF. Synthetic is great stuff.

I change mine about every 30K miles.
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Old 09-20-2004, 04:04 PM   #3
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until i thought i blew out my diff pin, i had NEVER changed my manual trans fluid. when i drained it to take the axles out, it was the CLEANEST, nicest, newest fluid that i've ever seen come out of an automobile and my car had a little over 166,000 miles on it at the time. i would say that, unless you have problems with leakage, you might not ever need to change that fluid. i don't think it breaks down like oil does, because it's not exposed to combustion...

just my 2 cents...


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Old 09-23-2004, 10:33 PM   #4
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30,000 miles. use dexron III, or IV automatic trans fluid, if older saturn it says to use dexron IIe but that isnt made anymore because of the new dexron covers the old fluid. i have valvoline high mileage in mine but i plan on getting royal purple syn or redline in it. there are no weights to choose from just go straight to dexron III or IV automatic trans fluid
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Old 09-23-2004, 10:53 PM   #5
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Dexron, you DON'T use.

The owners manuals specify regular ATF for manuals. Stick to it.
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Old 09-23-2004, 11:00 PM   #6
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i just read the manual and haynes manual both say use dexron. dexron was made for all gms. atf was used on older vehicles and chrysler vehicles.

do not use atf. use dexron it was made for gms

a quote from the saturn manual

"How to Add Fluid

Here's how to add fluid. Only use DEXRON III or Saturn transaxle fluid(P/N 21005966)"
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Old 09-24-2004, 12:50 AM   #7
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Older chrysler vehicles actually used straight SAE motor oil.

I've been running ATF in my tranny for the past 30K miles, no ill effects, same with my mom's SL2 auto, and the techs all said to fill it up with ATF.

I'll stick to ATF.
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Old 09-24-2004, 02:00 AM   #8
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I checked out the Amsol web page and this it what they said about their ATF:
"AMSOIL Synthetic Automatic Transmission Fluid (ATF) exceeds the requirements of the new DEXRON®-III transmission fluid specification. It resists thermal and oxidative degradation up to three times longer than conventional fluids and twice as long as the new 450-hour DEXRON®-III test requirement. It protects clutches, planetary gears, valves, pumps and seals from damaging sludge and varnish deposits and ensures cool, smooth transmission operation for intervals up to three times longer than recommended by the vehicle manufacturer."

So is ATF and dexron III the same type?
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Old 09-24-2004, 02:59 AM   #9
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ATF=automatic transmission fluid.
Dexron=automatic transmission fluid.

Dexron is General motors brand name for ATF.
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Old 09-24-2004, 03:11 AM   #10
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Weeeeeee
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