Sliding tandems

So just for an example I'd like to know IF the weight on my drivers is 20 000 and the trailer is 20 000 too and if I move the trailer axles 2 holes back
then roughly my drivers will be 21 000 and the trailers axles become 19 000.
Am I thinking properly?

 

Yes that is the general idea

 

butt heavy.. move trailer axles to the back... loads of 39k or less below the 45-48 ft line.. 9 holes from the front of trailer.. 45k if below the 48 ft line.. then 6-7 holes from front of trailer.. over 48 ft line.. then about 16 holes back.. these are on the newer walbash trailers.. 2 yrs old or less..

normally i see 250 lbs per hole on the walbash's... never move my 5th wheel... keeps my wings looking in shape.,, never know when you get into those really tight spots where you have to jack your trailer a lot to get it into a spot at the dock...