Auto box jumping

[didgit]

hello everyone I'm still here just been busy with mtb.

i need some advice on my gearbox, its 5sp auto with the usual S&W modes.
the cars now done 86000 and has full s,h.

the problem is now getting worse so before it goes to MB or an indie i need to know if its something my local guy can sort out.

i am getting the box jumping between 3rd to 2nd when braking to slow down/stop and sometimes it seems to get stuck in a gear and when i accelerate it jumps down a gear again and gives me a right good kick in the back, which is now really p***ing me off.
it doesnt happen all of the time but once it does it for the first time on a journey it proberbly happens 3-4 times more, worst case is at islands brake to slow if its clear foot down to go and wham kicked in the back just as if clutch dropped on a manual.

please can anybody shed any light thanks
didgit

 

[Ian B Walker]

Try resetting the gearbox. Might not do anything but there again it might. Do a search on gearbox reset.

 

[GazCaff]

Could be low ATF level causing this. You'd be best off getting the fluid changed at that mileage anyway.

 

[Dieselman]

Probably the MAF sensor going South. This can confuse the ECU and causes bumpy changes.
Also an ATF change MAY help but probably not.

 

[Parrot of Doom]

I agree with Dieselman, my MAF sensor seems a bit dodgy, when the car is cold I get awkward changes and a slightly lumpy idle sometimes. Once the car is warmed up, no issues whatsoever.