Hey, I just got my saab 9-5, have seen a 155 on the speedo, but I gotta have a bit of a down hill run to get from 4th to 5th as it shifts very slow and this causes it to drop off the boost and it goes into a shift to 5th, drop back to 4th, up . . . . loop. So I wanna change the tranny fluid and have no dipstick and no torex head nut on the tranny. Below the fuse box, in back of the battery their are two likely bolts, the one closest to the firewall looks like the drain bolt but is maybe 28mm, the other is a 16. I hate to guess, can you help me?