1985 F350 2wd dually is at the tire shop getting new tires. I haven't had the truck very long and been fixing some hack work and getting it running better. The rear has left hand threads (young guy broke the first one off while tightening thinking he was loosening). The truck also has the incorrect lug nuts on the rear with tapered seats rather than the washer style. So I need to find left hand thread washer nuts or is it possible to just change out the studs to right hand thread and use the correct nuts?

 

Last I saw, Rock Auto had that stuff.
https://www.rockauto.com

 

You could go lefty on the left side. But I think that righty ones are standard. Good thing about lefties on the left is they might stay on better. Bad thing about lefties is that people that miss the L mark can twist them off. You need the type of nuts that your rims are designed for. Can't mix and match there.

BB2

 

Left hand threads on the left rear seem to be factory. It currently has tapered lug nuts which is incorrect. If I can’t find LH lug nuts with washer I guess I’ll change them out to RH threads. I have to buy new lug nuts anyways

 

Left hand lugs was a theory they held onto for years but finally got away from them. I would convert it to right hand thread lugs like you mentioned.

 

If you can, post a picture of the failed stud and nut. I'd be interested to see what they look like.

BB2

 

This is the lug nut style On the fronts and should be on the rears too.

This is what is on the rears. And the broken stud from removing wrong direction.

 

Do you know what grade your studs and nuts are? Thanks for the photo.

 

No idea on grade, studs would be factory
original, I'm not sure where the lug nuts came from

 

I would be interested in what your rims look like. I have a 1981 F350 dually 2WD. It has left hand thread on the left rear, otherwise right hand thread. All lug nuts, front and rear, are tapered, cone shaped. The previous owner must have taken it to the same tire shop. One of my left hand thread wheel studs was broken off when I bought it.

 

If you happen to find out the grade designation while acquiring new studs let us know. Thanks!

 

I do not know much about this rim difference either. What I have gathered so far, is there are two different types of dually style rims floating around out there. I am not sure if both are Ford or some rims are from a different OEM. The one truck I have messed with was a 1989 F350 chassis-cab, and it had the flat looking lug nuts shown in the previous post. I think these are called "hub centric" wheels. If you notice, the lug nut above is flat, and all it does is hold the rim against the hub. But the center hole on these wheels fits very tightly on a protrusion sticking out on the hub on the truck. This is what centers the rim on the hub, and then the flat lug nuts just hold it on there with no centering.

I am not sure where or what years ever used a "lug centric" wheel, which needs the tapered lugs and the tapered lugs center the wheel on the hub.

 

This is a picture of a 1981 F350 dually front wheel. You can see the tapered lug nuts as well as the rim lug holes. They alternate each hole, raised and depressed. This way the rear wheel lug holes interlock when put together.

 

If this is a 1985 F350 2WD with DRW, the right and left rear lug bolts are the same.

However, the Dana 70 uses different lug bolts than the Sterling 10.25." Both were available in 1985.

But, if it's a 1984 F350 2WD with DRW, it will only have a Dana 70 and the right rear lug bolts (8-D0TZ-1107-A) are different than the left rear lug bolts (8-D0TZ-1119-A).

 

NumberDummy- do you have the Ford part
numbers for lug nuts on the Sterling axle?

My rims do not have the dimples around where the nuts seat in to center the wheel. Like stated earlier, some rims are hub centric and the holes for the studs are just flat.