crossmember bolt size?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*vegaschevy* · 11-13-2009, 11:03 AM

I am going to be replacing the crossmember that holds my trailing arms on. once the rivets are gone does anyone know what size bolts Ill need to bolt the crossmember on?
If it is any help Ill be bolting on a Porterbuilt crossmember

woodridge · 11-13-2009, 11:08 AM

I believe they are 3/8.

OldCreek · 11-13-2009, 12:31 PM

If you open them up just a hair, a 7/16" bolt will fit. I think the 3/8" runs a bit loose....if that matters.

11-13-2009, 11:03 AM	#1
vegaschevy Account Suspended Join Date: May 2009 Location: las vegas nv Posts: 1,493	crossmember bolt size?? I am going to be replacing the crossmember that holds my trailing arms on. once the rivets are gone does anyone know what size bolts Ill need to bolt the crossmember on? If it is any help Ill be bolting on a Porterbuilt crossmember

11-13-2009, 11:08 AM	#2
woodridge Senior Member Join Date: Feb 2005 Location: Maynardville, Tn Posts: 3,030	Re: crossmember bolt size?? I believe they are 3/8. __________________ SEMA Network- Protect our Hobby! 71 C30 in pieces, starting to come together. Click here for A Place For Tennessee Truck Enthusiest To Meet

11-13-2009, 12:31 PM	#3
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: crossmember bolt size?? If you open them up just a hair, a 7/16" bolt will fit. I think the 3/8" runs a bit loose....if that matters. __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263



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