| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If the raised surface that a tapered nut entered are destroyed, perhaps the wrong nuts were used plus someone with an impact wrench used it improperly.
If the studs are not rigid, it is time to get new 9/16(the next size larger) bolts, use a carefully sharpened(new if possible) 9/16 drill bit, and use a milling machine, or at least a drill press to make the holes are straight and vertical. This is not the time to do it on the cheap. Before you do any drilling, get the proper bolts as stated above, and proper nuts, either flat or tapered.
This works well if your 9/16 bolts are hogged out, to use 5/8 bolts, just make sure the mounting holes in the wheel are proper size. I had to use 5/8 bolts on my '95 GMC, drove the dealer nuts, me too, trying to find someone who knew what a dimension was, rather than VIN. Have 5/8 PN somewhere if someone has a need.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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