Hi Snapper. The price of trans fluid isn't the reason it's used in forks - the local Yamaha workshop has also heard of it being used. Trans fluid is designed and formulated to work evenly at pressure and temperature changes in a transmission whilst lubricating it. You may be surprised to hear that a few people are using it with great results ... I think i'll start a thread to see what kind of feedback there is on this topic and how popular it is becoming never heard of it being used but I can't see why it wouldn't work. be interested to see how many others have used it. which 5 shims did your mates remove?