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09-20-2002, 11:25 AM
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#1 |
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Registered User
Join Date: Aug 2002
Location: Oshawa, ON, CAN
Posts: 40
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Lug Nuts
I have just learned that the 71 and new 3/4 tons have 9/16" studs and 70 and older have 1/2" studs.
You see I have a 69 3/4 ton with split rims so I was going to buy a set of steel 8 bolts cheap then when I get it mainly restored I was going to buy nice chromes. Now I think I will have problems finding steel 8 bolts with 1/2" holes. What would be the easiest and cheapest fix? Should I replace the old drums with newer and therefore have 9/16" studs? (nothing has been done to the brakes yet) Suggestions?? Thanks Trevor 
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Newby 69 GMC Also own 88 4X4 Toyota P/U 01 Toyota RAV 4 |
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09-20-2002, 11:49 AM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Well, to be all honest, I ran 9/16 rims on 1/2 inch studs. I'm not recomending it, but the taper on the lugnut took up the slack, and the hub hole was actually taking he weight.
Double check before doing it. |
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09-20-2002, 11:53 AM
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#3 |
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Registered User
Join Date: Aug 2002
Location: Oshawa, ON, CAN
Posts: 40
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Kind of wondered about that Andy but I didn't want to suggest it. Thought someone might go off on a safety lecture.
Trevor
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Newby 69 GMC Also own 88 4X4 Toyota P/U 01 Toyota RAV 4 |
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09-20-2002, 12:21 PM
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#4 |
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Project Junkie! Fishing Poor!!
 
Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,768
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Well I am probly wrong on this also and a tire guy will probly correct me....LOL But I have never paid any attention to the stud size while changing rims arround. The taper of the lug nut has always both taken up the slack and centered the wheel. I know the same is not true for mag wheels, because the rim is supported by the stud. However the lug nuts are different for different years and that solves that problem.... WES www.ClassicHeartbeat.com
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On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys |
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09-20-2002, 12:33 PM
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#5 |
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CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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My only sugestion is to pay close attention when you first put them on to make sure the lug nut is tightening against the wheel. With the bigger hole the taper could go thru the hole and bottom out without having the wheel very tight.
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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09-20-2002, 03:17 PM
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#6 |
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Senior Member
 
Join Date: Jun 2000
Location: Texan in Iowa
Posts: 2,522
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It should matter very little if you are sure to get factory wheels with the correct size hub opening. That hub opening is designed to fit snug around the hub and take almost all of the vertical shock (pressure, energy...whatever), while the lugs just hold the wheel to the hub. But be sure the taper is enough to press it tightly against the hub, as tom hand said.
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Ben '68 Chevy C10 Custom LWB 327/TH400 2nd owner '16 GMC Sierra 1500 SLE Dblcab 4wd 5.3 |
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09-20-2002, 03:34 PM
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#7 |
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Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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I just did this on my 52. Bought some nuts that were made just for the situation. Have 1/2" threads in an oversized nut. Chevy didn't change the hub size, so you're okay there. Got the nuts at my tire dealer, about $1 each. You should be able to get them through a parts store, too.
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Fred There is no such thing as too much cam...just not enough engine.
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09-20-2002, 05:17 PM
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#8 |
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Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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I bought a set of rally wheels for mine,(8 lug from a 2001 GMC truck) and ran into the same problem. I'd changed the front brakes to disc earlier, and they were 9/16" and the rear drums are 1/2". Didn't realize this until I went to put the new rims on my truck. I asked for suggestions on how to rectify this problem, and someone said to drill the rear hubs to fit 9/16" studs. Sounds like the cheapest repair. Hafta remember that the studs are a pressed fit. Hope this helps?
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   LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class!  1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started. 
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09-20-2002, 10:02 PM
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#9 |
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Registered User
Join Date: Aug 2001
Location: Long Beach, Ca
Posts: 1,432
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Drill em and be safe. Ever had a front wheel come off, I did, The damm thing stuck in the wheel well and the front end went right over it. It was a quick 70 degree wheel stand and them BANG when I buried the nose. Not cheep to fix either.
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71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A> |
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09-21-2002, 03:39 AM
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#10 | |
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Account Suspended
Join Date: May 2000
Location: IL
Posts: 0
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