Kickdown slow to respond

[frozenwaffles]

Hi fellow X5ers...
My X5 is up past 200,000kms.
At around 20,000kms I had the transmission overhauled and rebuilt.
Recently I've noticed the Kickdown function is slow to respond...
Any ideas why this would be happening?
Basically I push the accelerator all the way to the floor, you hear the 'click'...
then it takes around a whole second, sometimes even more for the car to change gears and accelerate!

[Freestyler]

Originally Posted by frozenwaffles

Basically I push the accelerator all the way to the floor, you hear the 'click'...
then it takes around a whole second, sometimes even more for the car to change gears and accelerate!

That exact behaviour seems awfully familiar to me.
When i push the pedal to the floor -and activate the kickdown switch, i'm actually loosing power/torque/speed for a second or more, (engine revs stay the same, but the 'wide-open-throttle growl' disappears) before the gearbox decides to shift down. And THEN all the horsies wake up again, and off we go. But that is a looong second of 'nothing', when you are expecting a instant kick in the back.

I bought my X with 170k km on the clock. (recently passed 200k) But the kickdown-downshifts has been like this since i bought it. So i just assumed that it was normal behaviour. But you say that this is a recent thing on yours?
May i ask how your kickdown behaved/felt before then?

[frozenwaffles]

Well when the transmission was rebuilt and the 'adaptions' reset, it kicked down instantly! like plonk you foot ... whoosh you were planted in the back of your seat!
was amazing! now not so amazing...

[electricalserv x5]

mine has the same from time to time............do you program your suspension?

[Freestyler]

To my knowledge, the gearbox adaptions only last until the end of each drive. The adaption 'learning curve' are supposed to start from scratch each time the ignition has been off.

I'm trying to understand how and when your X changed it's kickdown behaviour.
Was your kickdown weak/hesitating before the transmission was rebuilt? Then instant & furious after the rebuild? And then slowly degrading to the present weak/hesitating state it is in now?
Or did it suddenly go from instant to hesitating some time after the rebuild?

I'm trying to determine if this hesitation is caused by wear and milage, or if it could be something in the gearbox or control unit that breaks or malfunction without throwing any error codes.

[frozenwaffles]

Thanks for the reply Freestyler. the change has been gradual from memory...
before the rebuild it was slow as well...if I remember correctly...