left hand lugs
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left hand lugs
When did ford quit using the left hand threaded lug studs? I found out the hard way that my 72 f350 has them on the drivers rear but not on the drivers front. The lugs are 9/16-18 and take a 1 1/16 socket. I thought ford stopped using them in the 60's.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
The front drums (or rotors) studs are the same right/left.
The rears are not. The rears are right/left specific.
The rears use several different length studs, which has to do with before/after certain serial numbers, and whether it has dual rear wheels or not.
1969/72 F350 SRW: DOTZ-1107-A .. Right Rear Stud / DOTZ-1119-A .. Left Rear Stud / 9/16" -18 x 2 13/16"
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From: Pittsburgh,Pa.
The rear axle on most trucks carries the most weight. If wheel lugs are not tight enough the wheel will begin to move around on the hub. If it goes unnoticed the lug nuts will slowly back off until the wheel becomes loose enough to wobble or fly off. Dual wheels compound the problem. I believe the theory behind left hand lug nuts on the left side of a vehicle comes from the idea that the centrifugal force created when the vehicle is moving forward would help keep the lugs tight.
Although they are not as popular as they once were left hand lugs can still be found on some medium/heavy duty trucks.
Although they are not as popular as they once were left hand lugs can still be found on some medium/heavy duty trucks.
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I also bought a set of lock type lug nuts for the new wheels. I didn't worry about the drivers rear though. I figured the left hand threads would keep a thief, with the intelligence of the average thief, from getting them off.
Post Fiend
Joined: Sep 2007
Posts: 6,221
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From: Cow Town, CA
my 70 F350 had them too. and it was a PITA to get Mag style left had thread lug nuts. i ended up going to this company where my dad knew of the head people and he just gave me 8. the company was Topline. i just dont know who sells them.
Tuned
Joined: Jan 2004
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From: Las Vegas, NV
I stripped the wheels off an '80 F350 DRW. The left rear studs had all been changed. I figured this was because somebody wanted to get rid of the left hand threads. This tuck had the coined style lug centric wheels, not the newer hub centric wheels that use the nuts with washers. Maybe when Ford went to the newer style wheels, they dropped the left hand threads too.
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I realize this is a super old thread, but its been a long day, and Ive had a few beers trying to cope with this frustration... Am I understanding this correctly...? Drivers side rear on my 70 F-350 dually is left hand threaded...? That would explain the two 3/4" craftsman sockets that blew up into a million pieces a few minutes ago...