Dennis;
I'm not too sure of how I was going to put this into the originial posting; I had to get a co-worker to help post it.
I guess the only way I can determine the ration is doing the jack up the rear end speed mentality?
How does the GVWR plan a role in determining rear axle?
I knew I wasn't lossing my mine on the axle code 46J; just my hair!

Mitch