transmission jumps from 2 to 1st gear only when its hot
 

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

Well if you have never had the trans serviced then now would be a good start. Since the shift goes bad once its at normal operating temp then you may want to have the trans temp checked to see if its within the proper spec. If the trans temp is in the proper operating range then you have other internal problems. You will need a proper diagnostic performed on the trans. Does the trans go into fail safe mode? How many miles on the vehicle?

No it does not go into safe mode it has 130,000miles and the thing is that when it starts doing that i stop at the store for 20-30 then i goes away but it does it again once it runs for 25-35mins

4.4i
 

It has 130,600miles and no it does not go into safe mode and its just on that gear when is in 2nd and its going to 1st it feels like when someone bumps into you from behind and it goes back to normal if i stop at a store to shop for like 35mins but it does it again when running for like 20mins again..well i live in PHOENIX so its 102 F today

Transmission symptoms can be misleading as to the root cause. Suggest you take it to a well recommended transmission shop that is familiar with BMW transmission for diagnosis.

Hello! I had such a problem . According to the diagnosis must be an error in the oil temperature sensor. If so , you have to change it . But this is expensive and complicated. I removed it . If interested , then I tell you how .

Have you tried putting the tranny in SPORT mode when this occurs? If you do, does the issue stop or continues to happen?

It's just a suggestion to see if the issue stops when it is no longer in ADAPTIVE mode.

Most likely the bushings in the valve body are shot and needs to be replace. There's a transmission guy on Youtube that is very familiar with these trans and may be able to point you in the right direction as to what is your problem.

This is his Youtube Channel

https://www.youtube.com/channel/UCWa...yLyQ7zjW9LF-xg