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Newb question 1/2 inch studs?

Old Jul 15, 2008 | 05:16 PM
  #1  
Arizona IROC's Avatar
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From: Rustfree Gilbert Arizona
Car: 1989 IROC
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 2:73 posi
Newb question 1/2 inch studs?

I noticed my IROC has 1/2" studs and lugnuts on it. Did someone modify my car or is that stock for IROCs? Mine is an '89
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Old Jul 15, 2008 | 06:11 PM
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AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Newb question 1/2 inch studs?

Had to be modified. All third gens come with 12mm x 1.5 wheel studs.
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Old Jul 15, 2008 | 08:23 PM
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Arizona IROC's Avatar
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From: Rustfree Gilbert Arizona
Car: 1989 IROC
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 2:73 posi
Re: Newb question 1/2 inch studs?

Ohhhhhh
Maybe the 1/2 20 nuts were just forced on the stock studs....

That doesn't sound safe
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Old Jul 15, 2008 | 08:30 PM
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AlkyIROC's Avatar
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25 Year Member
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Posts: 17,269
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Newb question 1/2 inch studs?

I doubt it. 12mm is closer to 7/16" than 1/2" and the thread pitch isn't the same.
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