DON'T DO IT!, DON'T DO IT!, DON'T DO IT!

Your risking a high $$$$$ transmission. R&R the fluid only. The transmission fluid is VERY specific as to it's frictional characteristics. I doubt your mechanic will flush with the OEM fluid @ $25+ per quart and using anything else will contaminate the transmission.

Again, DON'T DO IT!, DON'T DO IT!, DON'T DO IT!

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A good pessimist is never dissapointed!