20 Most Recent 2003 Ford F350 Super Duty DRW SuperCab - Page 7 Questions & Answers

if you have never done one its best to take to dealer because you have to remove drive shaft and then rear pinion nut and remove seal the tricky part is you have to buy new crush sleeve and thats what sets your pinon depth so that pinion rides in middle of ring gear its called setting your pinion depth if over tighten will hurt bearings and or ring gear and if under tighten will be verry noisey and cause ring and pinion failure best to let someone with special tools and knows what thier doing i use to do all chevy diff at my old dealer your use inch torque wrench to measure the drag on pinion nut and then use 1/2 inch impack to tighten the nut people freak because impack is rated at 600 ft pds but your using inch torque wrench to check drag not how tight nut is good luck

fuel pressure if to low wont start or hard start . get gauge and ck fuel pressure

A mechanic would disconnect the turn signal switch and check the circuits for shorts to ground.

Usually if a turbo engine starts smoking 'out of the blue' it is because the drainback line is clogged or has a partial buildup of coke in it (I went through this exact problem)-I ended up removing the turbo again and redid all the lines with new ones, and it solved it. You could install the new regulator anyway, but if it does not improve I'd think it is the oil return line.

Are you sure it's from the right rear area? I had something similar happen, and it turned out to be the bearing that joins the front and rear drive shafts at midship. Replaced the bearing, and the noise is gone.