I did pull the drive shaft and the axle shafts on the RDU, left the RDU unit installed, electrical connection connected, everything seems to be working just fine, no warning lights on the dash, I basically have a front wheel drive now. Hope the PTU stays good I change fluid every 15,000. I hated to do it but since ford is building junk these days and not backing their product i guess i had no choice, after buying a brand new RDU from ford and it goes bad in one year and eight months, definitely not any different than the Chinese junk