Drive Axles 36,000 lbs.Minus Tandems 32,800 lbs.-----------------3,200 lbs. (Difference)Divide the difference by 2 (2 axles, Drives and Steers)3,200 lbs. / 2 = 1,600 lbs. proportioning weightNow take the proportioning weight and divide by 250 ( this is the # of lbs. per hole)1,600 lbs. / 250 = 6.4 holesIn this case, your drive axles have too much weight, therefore they are the problem. So to properly proportion your load, you will always SLIDE TOWARDS the problem.So you will slide your tandems FORWARD 7 holes (since we cant technically slide 6.4 holes).