Yeah that sounds more likely, how do I disconnect the maf?
That is what happened when i disconected the maf.
So it probably wont solve your problem.
But you have the same symptoms as a disconected maf, so the maf may well be your problem.
By all means try it to see if the car behaves differently. it will do no harm.
It is located half way along the airfilter ducting.
If you look to the right hand side of your engine you will see black pipeing half way along you will see something poking out with a cable coming of it. (that is your maf) just unplug the cable and go for a drive.
The engine management light will come on. dont worry it will go out a short time after reconnecting the maf.
If it drives like a different car then it is a faulty maf. it will still snatch the gears so dont expect it to solve that issue.
But if the car feels like it has more power then i suspect your maf is taking faulty readings giving you a poor gear change and bad performance.
I have no idea why the maf affects the gear change in a sellespeed but it does.
Trust me i owned one. and the maf plays merry hell with the sellespeed system.
This may not cure your problem but it is a start and best of all it is free to check.
When you do it dont be shy and give it some beans and see if there is a difference in performance.
If there is a noticable gain in performance then change your maf for a new one. and hopfully your problem will be solved.
Insidently my gearchange was snatchy with a disconected maf as well as a conected duff maf. but the car went like a rocket with the maf disconected.
I got a new maf and the car still went like a rocket and the gear change went back to normal. (nice and smooth and a quick change above 5500 rpm)