Thanks for the response. I'm running a 75W85 right now, but I'm trying to get rid of the cold weather "crunching" of the tranny. I figured a 70w85 might help, but I'm pretty sure that can't be bought. Do you know if there is anything I can do to a 75W85 to make it a little more fluid before it gets completely heated? This happens when the trans is cold, whether it's -30C or + 30C.