1987 - 2007 Peterbilt 325-348, 357, 359, 320 And 350 Low Cab Forward Front Leaf Spring - 7 Leaves - 75-178

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Peterbilt front leaf spring part number 75-178.

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 7 (PD/6/1)
  • Leaf Spring Width - 4"
  • A - Leaf Spring Length: 35-3/8"
  • B - Leaf Spring Length: 32"
  • C - Leaf Spring Arch: 4"
  • D - Leaf Spring Pack Thickness: 5-7/8"
  • Leaf Spring Capacity: 10,500 lbs.
  • Leaf Spring OEM Number: 02-01817
  • Leaf Spring Eye Bushings: Front RNK / Rear HK-3
  • Leaf Spring Material: Pad 1/.625, 6/625, Second 1/1.197
  • Location - Front
  • Models With Cast Eye Type Springs


Leaf spring 75-178 is the front leaf spring on Peterbilt 325, 330, 335, 337, 340, 348, 357, 359, 320 and 350 Low Cab Forward. The spring is 4" wide, is a 7 leaf spring with a pad and has a capacity of 10,500 lbs. The OEM part number is 02-01817.


Models And Year Ranges:

Fits: Front Peterbilt 320 And 350 Low Cab Forward

Fits: 1987-2007 Front Peterbilt 357 And 359 (With Set Back Axle)

Fits: Front Peterbilt  325, 330, 335, 337, 340, 348, 357 And 359

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