just after a little help. my ef v8 fairmont has started slipping in first gear when everything is upto normal operating temp. it shifts fine through the rest of the gears once it grabs the gear fully and there is no slipping when the car is cold. the fluid level is right, although a little discoloured. would the problem just be the discoloured/dirty fluid or is it more likely something else?
cheers

Service time I would suggest.