I've noticed that my "new" 2000 Golf is making a low growling noise when I steer to the right and at higher speeds (I believe only at speed). Anyway, it might not be an issue with the transmission, but it got me thinking about replacing the transmission fluid. Car's got 116k miles on it: I'm still waiting to get the service records from the (PO's) shop that used to service the car, in which case I have no idea whether it was ever replaced or not, or if it had what fluid they might have used. My shifting is a bit notchy (a bit amplified after installing the Sigma5 shifter [which I think is great]), so I'm definitely interested in changing the fluid out. I guess that the growling noise is more like a low hum. This condition was noted in TSB 34 06 02. List of VINs affected are given. The bulletin says to change the fluid to G055 726 A2. It now sounds like G070 is now the recommended fluid (superseding all others). Seemed fine until I ran across this thread on TDIclub: http://forums.tdiclub.com/showthread.php?t=132884 In this thread people were complaining that G055 and G070 either didn't help or that they made things worse; the title of the thread is "stick with G52 in ur tranny - here's why..." Appears to be a HUGE can of worms! There's some technical discussion implying that VW is mis-stating the viscosity of G070, that it's actually much thinner than stated (possible problems in warmer climates): listing of viscosity for various fluids given at this post: http://forums.tdiclub.com/showpost.php?p=1651882&postcount=251 Seems that just about any fluid discussed had/has issues, with the one exception of GM Synchromesh (now ACDelco Synchromesh [http://paceperformance.com/i-733534...mission-fluid-friction-modified-1-quart.html]). Has anyone here run ACDelco Synchromesh? This stuff makes my head spin! I tend to lean toward what the manufacturer recommends, but in this case it seems that there's enough evidence out there to warrant a second-guessing. I'm in a mild climate (PNW), in which case I don't have to worry about extreme temperatures.