GM Service Manual Online
For 1990-2009 cars only

Fastener Tightening Specifications Haulmaxx Suspension

Application

Specification

Metric

English

Frame Fasteners Furnished and Installed by Truck Manufacturer¹

Auxiliary Spring Bracket to Saddle (Locknut)

129 N·m

95 lb ft

Auxiliary Spring Plate to Beam Assembly (Locknut)

129 N·m

95 lb ft

Auxiliary Spring Shim to Auxiliary Spring Contact Plate (Locknut)

129 N·m

95 lb ft

Bar Pin Attachment to Axle (Bolt Head)

780 N·m

575 lb ft

Bar Pin Attachment to Axle (Locknut)

712 N·m

525 lb ft

Bolster Spring to Beam Assembly (Locknut)

129 N·m

95 lb ft

Bolster Spring to Saddle (Locknut)

129 N·m

95 lb ft

Inboard Frame Bracket to Outboard Frame Bracket and Crossmember (Locknut)

257 N·m

190 lb ft

Inboard Saddle Bolts

70 N·m

95 lb ft

Rebound Clip to Saddle (Locknut)

129 N·m

95 lb ft

Rebound Strap to Auxiliary Spring Contact Plate (Locknut)

68 N·m

50 lb ft

Saddle to Outboard Frame Bracket (Locknut)

420 N·m

310 lb ft

Shock Absorber to Beam (Locknut)

108 N·m

80 lb ft

Shock Absorber to Frame Bracket (Locknut)

217 N·m

160 lb ft

Transverse Torque Rod to Axle (Locknut)

271 N·m

200 lb ft

Transverse Torque Rod to Frame

257 N·m

190 lb ft

Note:¹ Torque values listed above apply only if Hendrickson® supplied fasteners are used. If non-Hendrickson® fasteners are used, follow the suppliers specifications.

Fastener Tightening Specifications Except Haulmaxx Suspension

Application

Specification

Metric

English

Auxiliary Spring Jam Nut

70 N·m

52 lb ft

Single Axle Suspension

  • Bumper Nut

50 N·m

37 lb ft

  • Shock Absorber Lower Nut

85 N·m

63 lb ft

  • Shock Absorber Upper Nut

85 N·m

63 lb ft

  • Spring Eye Bolt Front Nut - 4500, 5500

415 N·m

305 lb ft

  • Spring Eye Bolt Front Nut - 6500, 7500 and 8500

485 N·m

358 lb ft

  • Spring Hanger Nut

85 N·m

63 lb ft

  • Spring Hanger Rebound Bolt, Taperleaf Spring

415 N·m

305 lb ft

  • Stabilizer Bracket Nut

85 N·m

63 lb ft

  • Stabilizer Clamp Nut - 4500 and 5500

50 N·m

37 lb ft

  • Stabilizer Clamp Nut - 6500, 7500 and 8500

220 N·m

162 lb ft

  • Stabilizer Shaft Nut

240 N·m

177 lb ft

  • Stabilizer Link Nut - 4500 and 5500

100 N·m

74 lb ft

  • Stabilizer Link Nut - 6500, 7500 and 8500

240 N·m

177 lb ft

  • 20 mm (0.787 in) U-Bolt Anchor Plate Nut Final Torque - 4500 and 5500

300 N·m

220 lb ft

  • 20 mm (0.787 in) U-Bolt Anchor Plate Nut Final Torque - 6500, 7500 and 8500

330 N·m

243 lb ft

  • 22 mm (0.866 in) U-Bolt Anchor Plate Nut Final Torque

415 N·m

308 lb ft

Tandem Axle Suspension

  • Equalizing Beam Bolt Nut

700 N·m

516 lb ft

  • Eye Pin Clamp Bolt Nut

85 N·m

63 lb ft

  • Rebound Nut

75 N·m

55 lb ft

  • Saddle Cap Nut

340 N·m

250 lb ft

  • Saddle Cap Stud

81 N·m

60 lb ft

  • Spring Bracket Nut - Front

200 N·m

149 lb ft

  • Spring Bracket Nut - Rear

175 N·m

130 lb ft

  • Spring Hanger Nut

85 N·m

63 lb ft

  • Torque Rod Bracket to Cross Member Bolt Nut

85 N·m

63 lb ft

  • Torque Rod to Axle Bracket Bolt Nut

175 N·m

130 lb ft

  • U-Bolt Nut Final Torque

330 N·m

243 lb ft