are you guys sure you should be running 10W30 and such in your tranys? I work for an oil company and we use everything from 75W90 to 85W140 for trannys.. if you look at any "Manual transmision oil" its going to be around 80W90 and such.. like that redline stuff is 75-90 i beleve.. just the idea of running an motor oil where a gear oil should be run makes me wonder..

but i could totally be wrong.. most of the tranny oil we sell is to rigs and larger trucks..