Crossmember Bolt sizes? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67CHIP72 · 04-27-2007, 11:50 PM

What are the bolt sizes/thread size of bolts for the cross members for the engine and tranny?

bandit1 · 04-28-2007, 12:24 AM

im pretty sure mine was 3/8unc

gator2511 · 04-28-2007, 09:39 AM

I just did mine. They are 3/8 SAE. (coarse thread) Be sure to use hardened stuff.

**LockDoc** · 04-28-2007, 09:55 AM

Quote:

Originally Posted by 67CHIP72

What are the bolt sizes/thread size of bolts for the cross members for the engine and tranny?

If you are talking about the bolts that bolt the front crossmember to the frame they are 7/16" grade 8, coarse thread bolts. Front motor mounts & Transmission crossmember are 3/8".

LockDoc

67CHIP72 · 04-28-2007, 03:10 PM

Thanks guys that helps.

04-27-2007, 11:50 PM	#1
67CHIP72 STOLEN Join Date: Jun 2006 Location: Orange County Posts: 1,022	Crossmember Bolt sizes? What are the bolt sizes/thread size of bolts for the cross members for the engine and tranny? __________________ In Search Of

04-28-2007, 12:24 AM	#2
bandit1 Registered User Join Date: Jan 2007 Location: Victoria B.C Posts: 35	Re: Crossmember Bolt sizes? im pretty sure mine was 3/8unc __________________ 1969 GMC 910 1970 GMC 1500 custom 1972 yamaha 175 "Money is just like trucks you can never have enough"

04-28-2007, 09:39 AM	#3
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: Crossmember Bolt sizes? I just did mine. They are 3/8 SAE. (coarse thread) Be sure to use hardened stuff.

04-28-2007, 03:10 PM	#5
67CHIP72 STOLEN Join Date: Jun 2006 Location: Orange County Posts: 1,022	Re: Crossmember Bolt sizes? Thanks guys that helps. __________________ In Search Of



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