Just picked up my new(to me) D70HD that I bought off of Tyler "blueblazer62". His friend and fellow board member, Jason "texascadillac42" dropped in off enroute to NY... Thanks guys!! Ok, onto the nitty gritty... So when I was searching for a wide width dually axle, I didn't find much info on brakes and such.. Figured since I have one at my disposal now, I would take some measurements for everyone.... If I dont include and info that you are looking for, pm me and I will get it and add it in... My plans are to take this axle and add 14FF SRW hubs to it, to bring the width out close to a DRW D60. Will also be adding disc brakes to this with the help of Kert from DIY4x.com. According to my readings on the internet, a 14ff hub and D70 hub have the same bearings, seals and bearing spacing. I will measure both spindles to comfirm this at a later date. The 14ff SRW hubs I have slipped right ont he spindle without a problem. D70 HD Measurements/info: The ring gear that came with this axle was stamped "75". So the housing should be the same unless it was changed somewhere in it's life. Also, this D70 doesn't use the same spindle nut configuration as the 14ff. My D70 has ONE thick(about 1/2") nut with "U" shaped notches similar to the 14ff and is locked in place by a keyway and snap ring. THis is similar to the 88+ 14ff axles. WMS - WMS: 73.375" - Stupid me didn't take a wms-wms measurement before I pulled the factory hubs. So I will replace this with an actual measurement when it cools off some.. Came about this measurement by subtracting the width that the 14ff SRW hubs added. Axle flange outer hub width: 4.480" WMS face to end of hub(axle flange end): 3.8125" End of hub(seal side) to backside of the WMS flange: 1.6875" End of hub(seal side) to WMS flange face: 2.09375" Axle tube width(main section)(apporximate): 4" Axle tube width between brake flange and hub(approximate): 3.5" Brake flange bolt width(approximate): 3.375" D70 HD axle shaft measurements: Length(approximate): 39.750" Shaft diameter from flange to where is necks up to the splines: 1.380" Shaft diameter width right before splines: 1.450" Shaft diameter on splines: 1.490" # of splines: 35 Measurements with the 14ff SRW hubs on D70HD axle(with nuts tightened): WMS - WMS: 77.500" Outside of brake flange(facing wheel hub) to rotor face of wheel hub: 8" Pic of D70 HD dually axle brake flange with 14ff SRW hub: 14ff SRW, D70 HD dually and 14ff C&C hub comparison: Pic - 14ff SRW hub, d70hd dually hub and 14ff C&C hub: 14ff SRW hub measurements: Across axle flange face: 4.495" Face of WMS flange to End of hub(flange face): 1.750" End of hub(seal side) to backside of WMS flange: 3.750" End of Hub(seal side) to face of WMS flange: 4.21875" D70 HD dually hub measurements: Across axle flange face: 4.480" Face of WMS flange to End of hub(flange face): 3.8125" End of hub(seal side) to backside of WMS flange: 1.6875" End of Hub(seal side) to face of WMS flange: 2.09375" 14ff C&C hub measurements: Across axle flange face: 4.476" Face of WMS flange to End of hub(flange face): 3.8125" End of hub(seal side) to backside of WMS flange: 1.6875" End of Hub(seal side) to face of WMS flange: 2.09375" So it looks like the D70 HD dually hub is the same as the 14ff C&C hub. And I am guessing that the width difference across the axle flangle is due to paint and corrosion difference of the three hubs. **Update 7-30 8:15pm** I went out in the garage after it cooled off some. Got to slide an axleshaft in to see how the shaft bolt pattern on the D70 lined up with the 14ff hub pattern. Got 4 bolts in and they lined up perfectly!!! Wont have any problems getting the other bolts in! Hope this helps!