[marton]

I have a 91 5.0 LX and this morning about 15 miles from home the auto transmission started slipping in all gears, maybe worse in OD. Never had a problem before.

I checked the fluid and there is plenty there, fluid was all replaced about 3 months ago at 54K miles. Fluid replaced because the garage said it was time to change not because of a problem. I did about 4K miles since.

I searched in the archives and did a web search but it seems to be unusual to have all the gears slipping, or maybe it is so common tha nobody mentions it!

Think it is worth checking the filter or have I a more serious problem?

Thanks for ideas