4.8 auto gearbox rebuild in the UK…

[svvg]

Hi All, I think I need an automatic gearbox specialist in the UK….. my gearbox is slipping when on 3/4 throttle and driving uphill, and a trans fail safe prog message popped up yesterday. It cleared on restart, but I had the following error codes when I scanned with DIS:

EGS Signal Line disturbed

EGS 4F8A ratio monitoring gearshift 4-5 plausibility

Can anyone recommend somewhere in the UK I can contact? My car has 126,000 miles on, I changed the filter and fluid about 10,000 miles ago, and while I will check for low fluid, I am not confident that another fluid and filter change is all that’s required… I’ve not yet heard a positive story about reconditioned gearboxes - so if anyone has any direct experience/can recommend somewhere, that’d be great.

Many thanks…