Quote Originally Posted by NTFDAY View Post
It probably has something to do with what is called back emf. As the starter spins it creates a magnetic field around the case and the reasoning is probably the manufacturer doesn't what that to in any way to flow back towards the battery. I would have used at least 8 gauge and mounted it to the frame if possible.
Ken,
I appreciate the input, but everything I've ever seen says the negative cable goes to the block, then you ground the block to the frame with strap or cable. My Jeep has a split negative cable, with one bolted to the side of the block, and the second to the firewall (not the frame). I've got a ground strap going direct to the frame from the bulkhead connector, and the cable then going from that same point to the engine block. I really don't think it's a ground problem, but then I could be wrong.