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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: heyharris1 on August 10, 2009, 07:55:33 pm

Title: rear axle flange bolt spec's
Post by: heyharris1 on August 10, 2009, 07:55:33 pm

hello all, I had to change a lug that broke on the rear drum of my truck, everythging went ok but cannot seem to find the torque specs for the bolts in the picture, i think they are called the axle flange bolts but not sure.(http://i217.photobucket.com/albums/cc90/heyharris1/IMG_2629.jpg?t=1249951937)
thank you
jim

Title: Re: rear axle flange bolt spec's
Post by: Blazin on August 10, 2009, 08:46:11 pm

gooduntight! The other one I use is the " two grunt method "

Title: Re: rear axle flange bolt spec's
Post by: Donut on August 10, 2009, 08:59:31 pm

More precise than my "elbow pop" and for the larger ones "shoulder pop". Guess I'm getting old.

Title: Re: rear axle flange bolt spec's
Post by: DnStClr on August 10, 2009, 09:54:31 pm

Naturally, the torque spec depends on the dia. of the stud and the material it's made of. A common spec for 1/2-20 studs is 77 lb ft torque when a grade 5 stud is used.

http://www.hotrodheaven.com/store/brakes/pdf/140-6293.pdf
 

Title: Re: rear axle flange bolt spec's
Post by: 78 Chevyrado on August 10, 2009, 10:17:28 pm

115 ft.-lbs

Title: Re: rear axle flange bolt spec's
Post by: heyharris1 on August 10, 2009, 11:20:51 pm

ty for the info.
jim

Title: Re: rear axle flange bolt spec's
Post by: 79K20 on August 11, 2009, 10:46:55 am

Those are probably Grade 8's... For a 1/2-20, torque is 92 ft-lbs.