It is called "life time".... But a better name would be "warrenty life". My trany died about 3 months ago. I had it rebuilt at a certified ZF transmission shop. They replaced 75% of the parts and kept them for me to view. The valve body internals were scored and scared badly. The valves didn't have the ability to do there job correctly.
The oil that came out of the trany was jet black and had a burnt radio smell to it. They trany shop tells me this is there #1 bread and butter. Tranys that had the same oil in it for 75k miles plus. They say 30k to 40k is when you NEED to change the fluid.
Anyway that is my $3700 experience in this topic. Oh, and my trans had 90k miles on it when it had the symptoms.
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Pro motocrosser since 2005. First time BMW owner.
2002 4.4 E53
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