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07-09-2004, 03:39 PM
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#1 |
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Registered User
 
Join Date: Sep 2001
Location: Cumming, GA
Posts: 470
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bolt size/grade required to install auto crossmember?
anyone know what bolts to use to install my new auto crossmember? Also, what bolts to connect the tranny mount to the xmember? I think I read that I can use the same bolts from my 3spd to connect the transmission to the mount.
Thanks!, Ryan |
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07-09-2004, 07:29 PM
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#2 |
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Registered User
Join Date: Apr 2004
Location: arkieland
Posts: 1,070
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I used 3/8" bolts about 1 1/4 inch long grade 8, but grade 5 would prob work also. Brian
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07-09-2004, 11:19 PM
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#3 |
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Account Suspended
Join Date: Jan 2003
Location: Shadow of Lambeau Field
Posts: 5,597
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I'd stay with the grade 8 since it's better to have too much strength than not enough.
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07-10-2004, 10:45 AM
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#4 |
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Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,253
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I used a cutting torch to remove the rivets from the 4x4 crossmember center section on my truck to swap my manual transmission/transfer case to an auto. I replaced them with 3/8" grade 5 bolts. They have been there for over two years.
__________________
'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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07-10-2004, 11:17 AM
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#5 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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I like to use grade 8 bolts on chassis stuff, but on the trans crossmember, grade 5 should do just fine
 crazyL 
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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