2017 JCW Auto ‘box Problems - Lumpy

[Fazmo]

For the last couple of weeks, during a long drive on a and B roads, a couple of hundred miles that is, the 8 speed auto gearbox becomes very keen to kick-down.

It goes back to normal the next day and is then ok pottering around during the week.

The worst problem is that no matter how lightly I accelerate, when it gets to about 15 mph it kicks down charges off then sorts itself out with a heavy clunk … very embarrassing it looks like I’m trying to race everybody and doing it badly

Any idea what may be the problem or how I can resolve it …

Cheers

edited to remove reference to ZF ... I had just assumed it was ZF

Edited by Fazmo on Saturday 28th May 15:08

Edited by Fazmo on Sunday 29th May 09:49

[Fazmo]

Thanks for the info ... I didn't realise it wasn't a ZF.

[Fazmo]

Cheers Pete.

I had mine booked in at mini specialist for some diagnostics but they said that it wasn't an oil leak then all they could do was reset it to default settings and hope it didn't learn any bad habits. Other than that they said I needed a gearbxo spcialist.

I cancelled the appointment though as it settled down. Not sure if it is still a bit lumpy or whether I'm imagining it ... its defo not hunting for 3rd gear any more though.

I'd like to swap it, probably for a z4m, but struggling to get agreement! I'll be annoyed if the problem returns and ends up being expensive!