Quote:
Originally Posted by Blighty
dont stick to the book for changing your automatics transmission oil. Unlike a manual, they a FUCKING EXPENSIVE to fix, and while transmission oil isn't cheap, do not hesitate to get it replaced at half the interval it says for you to to. These older autos will last forever if you just keep replacing the oil fairly regularly.
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This cannot be overstated. I helped a friend troubleshoot a 90s ZF box in a BMW. 200,000 miles on the original fluid. It was dropping shifts and tried to engage REVERSE at the same time as 5th gear. We flushed the fluid and replaced the filter, and then again after a few hundred miles. Ran like a champ after that.