Quote:
Originally Posted by StephenVA
...Thanks again for posting your efforts and results. I am sure we will continue the battle of "to change or not to change". IMHO fluid life at 10 years is the point of replacement and filter change time, period. No lube manufacturer recommends using fluids in a sealed bottle at that age much less keeping them in service.
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Yes, after thinking about it a little more I realize there is actually a very important similarity between the ZF and GM ATs - now they are both, in many cases, in a predicament due to BMW's "lifetime" ATF policy. And what do you do now - keep believing in "lifetime" or try to carefully work your way out of the problem? That is the same for ZF and GM.
So that very important aspect is similar between the two.