lost 2nd 3rd and drive

Can anyone help ?

Everything was fine at Bures pit last weekend when for some reason my autobox deceided not to play anymore. No unusual noises but whilst driving I lost all gears except 1st and reverse.I have checked the oil and the level is fine. Some guy recommended that I should try and change the oil.

Should I change the oil or do you think the box is fooked.

Thanks...Lazy :5bnopity:

might help if ya told us what it is, me crystal balls throwing a funny un today.

Yep that would be an idea. It is a 4 speed zf bolted to a 3.5 EFI.....