Hi can some one help me with my transmission i have a 2003 x5 4.4i and i am have issues with my transmission when i drive it for like 45mins it shift up great but whem im slowing down from 2nd to 1st it jumps and only on that one all the rest shift great..some people tell me i need a new transmission oil cooler and someone else tell me i need a oil and filter change. Let me know what you think thank you