oh ok now I see it

feel free to point out how dumb I am...

Has this only just started happening though? Different driver/driving style? If not there could be something wrong that requires further investigation as normally the lockup in these things is barely noticeable.

I presume you have the ZF, my BFII does the same thing and I put it down to it looking to change gear and dropping revs to change, I found that it doesn't do it whilst manual shifting.

I too would like to know if anyone else has this isssue.

Kept a very close eye on it this morning - FWIW it is a relatively slow, smooth drop, not a sharp cutout. The car doesn't lurch forward or clunk or anything like that. Pretty sure its been doing it since day one, I just never really thought to do anything about it. Given I'm approaching my umpteenth visit to Fraud for warranty repairs I thought bugger it, I'll get them to take a look.

Yes it is the ZF

torque converter lockup 100%. nothing to be worried about.

Nothing to worry about =

a) Normal and will be left as is

b) Not a major problem and can be easily fixed

???

a)

Everytime you notice it, just think it's your car doing its bit to save the environment by reducing emissions which should then lead to a warm and fuzzy feeling (if your ambient temp. sensor is working!)

Jolly good. Thanks all - I will report back and let you know what the geniuses at Fraud decide the problem is.

Ambient temp is fine but yeah... fuel gauge still no good. Can't wait till all these nigglies are sorted out so that I don't have to have the inconvenience of going there (my mechanic is so much easier to get to and near work for pick ups and drop offs) and then... well, I can not worry about my warranty when tinkering with it

I used to own a 2005 f250 7.3 turbo diesel auto which did the same thing. I didnt realise what it was at first because it seems some what wierd when engine revs are droping but the speed is increasing.

When the torque convertor is slipping it is generating heat. I did a lot of towing with the f250 and guess what happen...fried the auto! Luckily it was fixed under warranty.

I did find a fix on another forum it which I could manual lock the convertor. This worked well but the only problem was that you had to remember to turn it off when you stopped or it would stall the engine.

I will have to pay more attention to my fg next time I drive it but I have not noticed it doing it.

my xr6t ute does the exact same thing. at first I thought it was a problem but I have since written it off as the torque converter reaching its stall limit and "locking in".... it only does it a lower rpm.. if it kicks back a gear or two doesnt do it...