Mike, Please don't take offense but I simply must say this.
I do not understand what your obsession is with tearing down the engine and ZF "next year" for a complete rebuild? Your current engine has very low miles on it. If you dodged this bullet and the the engine runs well and the ZF shifts like butter forget about it. Enjoy driving the car.
If the engine starts making funny noises (rod knock etc) smokes or refuses to run then yes yank it out. Until then DON'T WORRY....
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