S2000 Under The Hood S2000 Technical and Mechanical discussions.

simultaneous fluid change

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Old 10-01-2008, 03:08 PM
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I was wondering if its possible or rather a good idea to change all 4 at once. I have 4 jack stands and can set it up on them. The oil, trans, and diff fluids just leak out correct? Once you had those coming out you could forget them and pay strict attention to bleeding the breaks and making sure the reservoir stays full to keep air out of the lines.
Old 10-01-2008, 03:12 PM
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Theres no reason not to. I have done engine/diff/tranny at once in the past.
Old 10-01-2008, 03:32 PM
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done oil, diff, brakes @ same time... gotta do tranny
Old 10-01-2008, 03:56 PM
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why not. i have done all in 1 hr... might as well do it at once since your down there anyway....
Old 10-01-2008, 04:08 PM
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I was planing to do them all. But wasnt sure if their was some reason to do them one at a time.

Thanks for the help
Old 10-01-2008, 07:06 PM
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Convenience is the main driver in your decision, but I wouldn't do early changes since it is wasteful of petroleum resources. Just change the ones that are due.

I do engine oil every 4-5k miles, transmission and differential together every 15k miles, and brake fluid every 2 years. Usually, the timing of these fluid changes does not align.
Old 10-02-2008, 07:30 AM
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anyone here that have changed their tranny fluid ever notice a smoother shift or is it barely noticable.
Reason I ask was I waited over 40k miles and i changed mine. Didnt feel any different. I used the correct oil sold from Honda to this day.
Old 10-02-2008, 07:40 AM
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Originally Posted by billiardboy904,Oct 2 2008, 10:30 AM
anyone here that have changed their tranny fluid ever notice a smoother shift or is it barely noticable.
Reason I ask was I waited over 40k miles and i changed mine. Didnt feel any different. I used the correct oil sold from Honda to this day.
I find it usually feels better for a week or so after the change and then it's back to the same old...

I have changed oil.diff and tranny at the same time, but not brakes at the same time.

I don't see why you wouldn't want to do it all at once though if it's all due. Make it easy on yourself and your car by not having to jack it up and put it on stands more than you need to.

If your cars on stands, you don't need to take off the wheels for brake fluid change either
Old 10-02-2008, 07:44 AM
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I used the new OEM honda 10k ago, but it was always fairly notchy and got worse after a few thousand miles. I now have 1k on 50/50 honda OEM/Amsoil MTF and it's awesome, and hasn't lost any smoothness at all. I have to put a few more thousand to see how long it lasts though.

Oh, whoever said to let the car shift itself, I just adapted that today and I thank you. Trans shifts and clutch work is a piece of cake now. Feels like i've been shifting wrong until now.
Old 10-02-2008, 04:35 PM
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^^ I knew there was a cooler way to shift..lol!! Elaborate on this please.

As for the 50/50 mix sounds like a good idea to me, good advice


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