4.8 Transmission Logic - Time to fix it or flick it

[Eurosport]

doesn't this have to do with inclines only?
it's almost like x5 trannys are confused when you go uphill about shifting, finding the right gear
but if you think that's bad,
then try driving new M5 with smg III around town, you'll go nuts in 5 mins lol worse shifting confusion than X5 by milliontrillion times ;p

[willy_manily]

Trade it in for a 4.4 Very good motor

[jobaker4]

NextGen - Do you notice, does your X still downshift and rev the engine pretty high as you decelerate downhill? My 4.8 does this bad whereas my 3.0 never did it. Is this just a function of the "Sporty" programming of the 4.8? It's just horrible, sometimes my rpms will rev up to 4,000 or higher and I'm just going downhill... SO aggrivating!

[LVR]

Originally Posted by jobaker4

NextGen - Do you notice, does your X still downshift and rev the engine pretty high as you decelerate downhill? My 4.8 does this bad whereas my 3.0 never did it. Is this just a function of the "Sporty" programming of the 4.8? It's just horrible, sometimes my rpms will rev up to 4,000 or higher and I'm just going downhill... SO aggrivating!

That's deliberate, and part of the 'economy' settings used by BMW. It senses that you have no or little throttle and maybe have used the brakes, so it changes down a gear or two to use compression (ie engine) braking.

[NextGen]

Originally Posted by jobaker4

NextGen - Do you notice, does your X still downshift and rev the engine pretty high as you decelerate downhill? My 4.8 does this bad whereas my 3.0 never did it. Is this just a function of the "Sporty" programming of the 4.8? It's just horrible, sometimes my rpms will rev up to 4,000 or higher and I'm just going downhill... SO aggrivating!

I have not noticed this prior to or after the upgrade. There aren't that many hills in my neck of the woods. I'll see if I come by one tomorrow and let you know.

[NextGen]

Originally Posted by jobaker4

NextGen - Do you notice, does your X still downshift and rev the engine pretty high as you decelerate downhill? My 4.8 does this bad whereas my 3.0 never did it. Is this just a function of the "Sporty" programming of the 4.8? It's just horrible, sometimes my rpms will rev up to 4,000 or higher and I'm just going downhill... SO aggrivating!

I found a really high hill today that had to be about a quarter mile long. I cruised down it and the rpm never changed. I really like this tranny upgrade!