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Old 08-11-2018, 09:15 PM #1
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Transmission Fluid: Was a decision ever made - WS vs Maxlife
Hello all,

in a week or two my friend and I are going to do a fluid exchange on my '03 V8.

I've been poring over pages and pages of debate that can be pretty much summed up in two sentences:

1) WS Fluid is what the engineers specified for the Toyota transmission, and therefore it would be foolish to even think about deviating from that.

2) WS Fluid is not as good as other kinds (MaxLife seems to the the most popular alternative) and does not handle heat as well as it should.

Has a final decision ever been determined which to go with? Or is this one of those perpetual motion machines for the ages like Bud vs Miller, Coke vs Pepsi, etc?
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Old 08-11-2018, 09:43 PM #2
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It's a conundrum, no one knows for sure IMHO, BUT I think either is better then leaving the old fluid in there!!

There are also other fluids out there that maybe even better but who's to say other than fans of a particular brand, Amsoil, Royal Purple to name a couple.
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Old 08-11-2018, 10:20 PM #3
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I went with the Maxlife about a year ago. So far so good....that's all I can say.
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Old 08-11-2018, 11:08 PM #4
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What I really should do is compile all the info I've unearthed and see if it is worthy of a place in the FAQ sticky.

I myself am leaning towards Maxlife based on what I've read. Neither choice has resulted in tragedy anywhere either.
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Old 08-11-2018, 11:09 PM #5
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I did a 50/50 mix of Toyota oem ws and maxlife on my last flush, my next flush will be straight maxlife
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Old 08-11-2018, 11:18 PM #6
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You sure your 03 takes WS? I thought 03 was the last year of dip stick and older fluid?
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Old 08-11-2018, 11:39 PM #7
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Quote:
Originally Posted by Brian3676 View Post
You sure your 03 takes WS? I thought 03 was the last year of dip stick and older fluid?
Hmm.
Looks like I have some more investigating to do. Indeed my truck has a dipstick, but some recent snooping revealed that the pan with the dipstick tube fitted is the only difference between "early" and "late" 5-speed transmissions (the A750F by Aisin-Warner)

Maybe the 4-speed in early V6 models used the other type of fluid? Im gonna look into this to be sure.
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Old 08-12-2018, 12:02 AM #8
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I used WS but mainly wanted to commend you on the correct usage & spelling of “poring.” 🙂
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Old 08-12-2018, 12:07 AM #9
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I use maxlife in both my rigs and they are working just fine. .
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Old 08-18-2018, 12:23 AM #10
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