I know what your saying fella, coz the transmission is going to need to be upgraded just the same at 400 as if I was running 500. I don't drive like a girl so i would break std tranmission with 400 .

Tiff, if it's coming apart for a h/g I'd go for the full monty and rip the lot out and rebuild, just to save on expense in the long run. Don't want to re-use the wrc head gasket