ZF on transmission oil change and lifetime myth - Toyota FJ Cruiser Forum
Transmissions / Transfer Cases / Traction Aids This area is for discussion, questions and problems with the FJ Cruiser's gear train, including topics on A-TRAC, VSC, locking diffs, gear ratios, manual vs. AT, etc.

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post #1 of 6 (permalink) Old 08-20-2019, 04:18 AM Thread Starter
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ZF on transmission oil change and lifetime myth

Done very nicely and they debunk the lifetime fluid myth.

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post #2 of 6 (permalink) Old 08-24-2019, 10:17 PM
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Re: ZF on transmission oil change and lifetime myth

Yikes this brings me back to my BMW days, I don’t miss that. All the arguments for or against changing fluid. This seems to end it all, and debunks the whole “lifetime” fluid idea.

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post #3 of 6 (permalink) Old 08-25-2019, 12:57 PM
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Re: ZF on transmission oil change and lifetime myth

I always thought people understood what happens when you heat ANY petroleum product...the lighter molecules eventually boil off, the same way you boil off diesel, gasoline, kerosene, etc. when distilling crude oil.

The entire time your fluids are being pumped, tiny grains of 'shmutz' (steel, rubber, plastic, etc.) are being worn off edges and lurk in the fluids used to lubricate.

Lifetime anything is pretty much a crock. Can't have mechanisms that do not wear or parts that never fail.

I personally think this was a huge scam put in place for the people who lease or those who buy new cars every year or two...
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post #4 of 6 (permalink) Old 08-25-2019, 03:42 PM
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Re: ZF on transmission oil change and lifetime myth

So Toyota floated this BS with other vehicles, not just FJs?



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post #5 of 6 (permalink) Old 08-25-2019, 03:47 PM
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Re: ZF on transmission oil change and lifetime myth

Anyone notice how many solenoids were attached to the valve body of the Steptronic 8-speed? Will be interesting to see how reliable these transmissions are, especially for those that never get a transmission fluid change.

Also glad that Toyota used a stamped steel pan rather than BMW/Zf's molded plastic pan with the integral filter that makes replacement of the pan mandatory when servicing the transmission. The pan alone is over $100, plus ~$90 in Pentosin brand fluid.
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post #6 of 6 (permalink) Old 08-25-2019, 04:47 PM Thread Starter
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Re: ZF on transmission oil change and lifetime myth

ZF started this lifetime BS myth and Toyota followed. Also today's low viscosity oils make me wary when I am going up a hill on a hot day or doing the dunes. A transmission cooler is a must and so is fresh fluid. I am glad Aisin AFW+ is all synthetic WS certified fluid thats cheaper and interestingly has higher kinematic viscosity than WS itself. I would rather not pursue the so called 2% fuel savings and busted tranny.

The ZF on my wife's M class gave up under sixty thousand and it was a solenoid failure interestingly.
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