First off love my ranger 99 3.0 flex fuel 5 speed. I bought new always maintained.I have had no problems except gernaded cluch and distroyed stock rear end. I have beat on her at times. Well had check engine light on 0174. I had no vacuum leak. I tryed too much stuff. Icv maf coil wires ff dpef. Replaceing those parts didn't do it. I tryed upper o2 bank 2 solved the problem. Runs real good. But now my idle stayes at 1100 until about 2 sec after completely stopped. Take out of gear before I stop. Any suggestions?I would like to know what spline is most commen for a rear gear 10 inch drums ?