I changed my 9" center section today from a spool to posi traction, my problem is the spool is through splined, and the posi is not. One axle is about 1/2" too long, and needs to be shortened. I'm not sure but it may be 4140??? Will the spline cause problems parting, or should I cold saw the end, I also have an abrasive chop saw or 7" cut off wheel.