Jim, interesting info! I know there was an issue with the additive packages in most gear lubes, that were NOT happy in MB manual transmissions. Apparently RedLine's specific formula works OK, since you have it in at least 2 of your manual MB trannies (I think) with no problems. However I still would not use any motor oil (10W-30, etc) or any gear lube besides MTL. Sounds to me like the 2 viable choices are down to synthetic ATF and also MTL. Do you really think there is that much difference between the ATF and (Red Line) MTL products? Thanks again for the info, btw!
