904 no 3rd gear?Why?

Do you or they just have a spare Valve body laying around to test with? Also you can pressure test it as well, for some reason your high direct clutch is not working, but the direct and band are holding to get reverse, sounds like a shuttle valve is stuck from a rags lint, or a wrong size check bale or hole covered etc in the plate on the valve body. Only other thing is the kick down linkage is jambed.

A band would have to be SUPER tight to cause no 3rd, but then you would have issues in other gears too..


You can stuff any 727 or 906 valve body in to test from same year or years case, depends on the year of your trans. But it is a pretty wide selection of fit.

Good luck, sounds like they are not to with it, sorry my 2 cents...