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Old 09-19-2018, 09:28 PM   #1
72timemachine
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Anyone know what year GM began using...

the 4 3/4" lug stud pattern on their rear ends?

I was looking for a 12 bolt, 5 on 5 in the boneyard last week and found an open carrier rear end in a '78 Chevy c/10, however when I measure the lug studs on center, they were only 4 3/4". I was looking for a 5 on 5 lug bolt pattern to match my front end.

Thanks for any help
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Old 09-19-2018, 10:04 PM   #2
geezer#99
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Re: Anyone know what year GM began using...

You measured wrong.
Centre of stud to outside of stud.
Look here.
https://www.wildhorses4x4.com/produc...terns/tech_faq
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Old 09-19-2018, 10:25 PM   #3
72timemachine
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Re: Anyone know what year GM began using...

Thanks for the info.
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Old Yesterday, 09:16 AM   #4
CSHADES
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Re: Anyone know what year GM began using...

I hate measuring wheel pattern spacing so I bought a $5 plastic wheel template at the swap meet. Easy to carry and quick for measuring.
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