I wish the "poll" would have had separate entries for 4.4 and 3.0 engines. Curious to see the failure rate for trans with 4.4 vs. 3.0. Wonder whether the 4.4 trans fails more or less often than 3.0. I have nearly 100K on my '02 3.0, never changed fluid, all appears OK at this point re the transmission. Wish my X5 had a manual.