gear change needs higher revs from gear 2 upwards

[ickyxxx]

Hi,
I have an X5 E53 4.4 year 2000 automatic . It's started to rev higher to go into gear 3 and above after about 30mins continuous driving . Even if I manually shift it up , it drops back to 3 straight away.Needs loads of revs to get to next gear. Goes down gears fine. First 30 mins or so driving , it's fine.  When I stop and I put in manual to 5 , it jumps back to gear 1 (before I move) , I know it wont work properly. When it is working properly , it jumps to gear 3 at standstill instead of 1 (i am assuming thats normal).
I have had the transmission fluid changed and the filter and software updated.
The fault happens after about 30 mins, maybe the transmission fluid is getting hot.
When I turn engine off for 5-6 mins and then restarting seems ok for a bit, but then starts playing up again.


Any suggestions would be appreciated.
Regards

[ickyxxx]

sorry i have put this in wrong section, i will move it to E53 section.