73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: VTK5Mudder on January 21, 2016, 10:00:40 pm
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Can anybody tell me what I need to torque the rearend hub bolts to on my 1979 3/4ton GMC pickup ? I don't want to over tighten and sure don't want the axle coming out because I didn't tighten them enough ! so if anybody knows what the torque specs are for those bolts could you pass it on ? Thank you !
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what axle?
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It's a 3/4 ton so 14 bolt ff.
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It's a 3/4 ton so 14 bolt ff.
yes that's what they are . its the bolts that hold the hub and axles in you have to pull them out to do the brakes . I don't know what there suppose to be torqued to or do I just tighten them down good [which doesn't seem right] .
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I know the bolts you speak of, they are the axle-to-hub bolts, I do not know the torque spec but there is one. Let me browse the service manual momentarily.
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Page 4B-24 of the 79 Chevrolet Light Duty Truck service manual.
Axle Shaft to Hub Bolts for Chevrolet with 10 1/2 inch ring gear, 115 ft lbs.
(http://uploads.tapatalk-cdn.com/20160123/610083057aaf131abf4b3171ae9514ca.jpg)
An entire digital copy of the manual can be found in Tech section under 73-87(91) Service Manuals.
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didnt sf 14 bolt also come on the ¾ tons?
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didnt sf 14 bolt also come on the ¾ tons?
Yes
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should be the same tq though.
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Page 4B-24 of the 79 Chevrolet Light Duty Truck service manual.
Axle Shaft to Hub Bolts for Chevrolet with 10 1/2 inch ring gear, 115 ft lbs.
(http://uploads.tapatalk-cdn.com/20160123/610083057aaf131abf4b3171ae9514ca.jpg)
An entire digital copy of the manual can be found in Tech section under 73-87(91) Service Manuals.
Thank you this is a big help I've looked around and hadn't been able to find this , thanks again.
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Your very welcome. All of the torque specs are on that page and the next, 4B-25.
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i thought semi floats only came out in the 80's trucks ???
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https://www.ringpinion.com/b2c/DiffDetails.aspx?DiffID=223&SearchMode=Diff&TypeID=5 says 79
then this place says 81
http://eastcoastgearsupply.com/c-61567-gears-install-kits-carriers-spider-gears-general-motors-gm-9-5-14-bolt.html
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but even if it didnt come in it it doesnt mean someone didnt swap one
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Regardless of when sf came out, I think the original poster found what he was looking for.
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yup got what I needed thanks , and truck is all original .