Author Topic: 79 3/4ton what do i torque the rearend hub bolts to ?  (Read 6387 times)

Offline VTK5Mudder

  • Newbie
  • Posts: 64
79 3/4ton what do i torque the rearend hub bolts to ?
« on: January 21, 2016, 10:00:40 PM »
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 !

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #1 on: January 22, 2016, 04:24:40 PM »
what axle?
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline LTZ C20

  • Senior Member
  • ****
  • Posts: 3795
  • "I'm here for a good time" -George Strait
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #2 on: January 22, 2016, 11:08:58 PM »
It's a 3/4 ton so 14 bolt ff.
LTZ Cheyenne C20

Offline VTK5Mudder

  • Newbie
  • Posts: 64
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #3 on: January 23, 2016, 12:44:49 AM »
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] .

Offline LTZ C20

  • Senior Member
  • ****
  • Posts: 3795
  • "I'm here for a good time" -George Strait
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #4 on: January 23, 2016, 02:30:31 AM »
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.
LTZ Cheyenne C20

Offline LTZ C20

  • Senior Member
  • ****
  • Posts: 3795
  • "I'm here for a good time" -George Strait
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #5 on: January 23, 2016, 02:43:42 AM »
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.



An entire digital copy of the manual can be found in Tech section under 73-87(91) Service Manuals.
« Last Edit: January 23, 2016, 02:45:59 AM by LTZ C20 »
LTZ Cheyenne C20

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #6 on: January 23, 2016, 03:00:40 PM »
didnt sf 14 bolt also come on the ¾ tons?
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline fitz

  • Senior Member
  • ****
  • Posts: 2084
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #7 on: January 23, 2016, 03:46:36 PM »
didnt sf 14 bolt also come on the ¾ tons?
Yes

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #8 on: January 23, 2016, 04:11:47 PM »
should be the same tq though.
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VTK5Mudder

  • Newbie
  • Posts: 64
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #9 on: January 24, 2016, 01:47:08 AM »
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.



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.

Offline LTZ C20

  • Senior Member
  • ****
  • Posts: 3795
  • "I'm here for a good time" -George Strait
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #10 on: January 24, 2016, 02:14:29 PM »
Your very welcome. All of the torque specs are on that page and the next, 4B-25.
LTZ Cheyenne C20

Offline jg1977c20

  • Registered Users
  • *
  • Posts: 104
  • Newbie
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #11 on: January 24, 2016, 10:16:58 PM »
i thought semi floats only came out in the 80's trucks ???
1977 c20 cheyenne camper special 8200gvw

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #13 on: January 24, 2016, 10:39:40 PM »
but even if it didnt come in it it doesnt mean someone didnt swap one
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline LTZ C20

  • Senior Member
  • ****
  • Posts: 3795
  • "I'm here for a good time" -George Strait
Re: 79 3/4ton what do i torque the rearend hub bolts to ?
« Reply #14 on: January 25, 2016, 01:45:11 AM »
Regardless of when sf came out, I think the original poster found what he was looking for.
LTZ Cheyenne C20