My 03 4.4i is on its original trans at 163,000 miles and it shifts perfectly. It has had 3 services in its life with ZF lifeguard fluid. That's what I attribute to it lasting this long. The guides are also original on my 4.4i but I have every record since new indicating oil changes every 5k miles since mid 2004 however if I keep it I will do guides and vanos rebuild. I'll have to drive the 4.6is to see but even if it needs the work mine doesn't its still a rare E53 and I like you 740ilDuke feel obligated to bring it back to almost new condition.