i think the " lifetime" fluid is a bunch of crap. i change front and rear differentials, transfer case and transmission fluid in my f250 truck at 25k and she was like a new beast.

i think we all get dipstickless vehilces because of the few idiots that do not know the proper way to check an automatic thus overfill them and blow out a seal.

you never get all the fluid out of the converter, but i would change it ,change it ,change it. your transmission will love you for it.

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g-wagen