Author Topic: Idler Arm and Pitman Arm Torque Specs  (Read 1333 times)

Offline LILT77

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Idler Arm and Pitman Arm Torque Specs
« on: June 20, 2023, 09:16:10 PM »
Looked through the FSM, maybe Im blind. Replacing the idler arm and pitman arm. Does anyone know the torque values associated with these parts? Idler arm to frame mount/center-link, pitman arm to gearbox/center-link?
77 C10/Big 10 Cheyenne "Old Blue"
81 C2500 Sierra Grande "Gramps"

Offline JohnnyPopper

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Re: Idler Arm and Pitman Arm Torque Specs
« Reply #1 on: June 21, 2023, 11:45:27 AM »
Mostly depends on the size of the bolt/nut/thread count. I'm sure there is a torque guide on line.

The ball joints of those components go as tight as you can to get the cotter pin to line up.
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline VileZambonie

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Re: Idler Arm and Pitman Arm Torque Specs
« Reply #2 on: June 22, 2023, 05:57:52 AM »
Pitman arm nut to gear box is 185 ft-lbs, pitman arm to relay rod is 66 ft-lb, idler arm to frame is 30 ft-lb, idler to relay rod is 66 ft-lb.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10