1978 - 2021 Navistar International & Fire Apparatus 4100-4400, MV, HV, 7300-7700, 8500, 8600, S-Series, Amtran, 9000 Series, Lonestar, Prostar And Paystar 5000 Rear Helper Spring 55-037
SKU: 57298574105

1978 - 2021 Navistar International & Fire Apparatus 4100-4400, MV, HV, 7300-7700, 8500, 8600, S-Series, Amtran, 9000 Series, Lonestar, Prostar And Paystar 5000 Rear Helper Spring 55-037

Sale price$77.28 Regular price$85.87
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Description

1978 - 2021 Navistar International & Fire Apparatus 4100-4400, MV, HV, 7300-7700, 8500, 8600, S-Series, Amtran, 9000 Series, Lonestar, Prostar And Paystar 5000 Rear Helper Spring 55-037Number of Leaves 4 Leaf Spring Width 3" A Leaf Spring Length: 19 3 4" B Leaf Spring Length: 19 3 4" C Leaf Spring Arch: 3" D Leaf Spring Pack Thickness: 1 7 16" Leaf Spring Capacity: 2,250 lbs. Leaf Spring OEM Number: 473725C91 Leaf Spring Eye Bushings: Front Slipper Rear Slipper Leaf Spring Material: 4 . 360 Location Rear Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit: How to Identify a Leaf

  • Number of Leaves - 4
  • Leaf Spring Width - 3"
  • A - Leaf Spring Length: 19-3/4"
  • B - Leaf Spring Length: 19-3/4"
  • C - Leaf Spring Arch: 3"
  • D - Leaf Spring Pack Thickness: 1-7/16"
  • Leaf Spring Capacity: 2,250 lbs.
  • Leaf Spring OEM Number: 473725C91
  • Leaf Spring Eye Bushings: Front Slipper / Rear Slipper
  • Leaf Spring Material: ย 4/.360
  • Location - Rear


Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit:ย How to Identify a Leaf Spring.

ย 

Leaf spring 55-037 is the rear helper spring for Navistar International 4100-4400, MV607, MV607H, 7300-7700, HV507, HV513, HV607, HV613, 8500, 8600 Series 1400-8300, S-Series, 1400-8300, Amtran Genesis, Amtran FE, RE, Paystar 5000, 9100-9900, Lonestar, Prostar, LT625 and RH613. Also fits Fire Apparatus Ferrara, Pierce and Emergency One. This spring is 3" wide, is a 4 leaf spring and has a capacity of 2,250 lbs. The OEM part number is 473725C91.


Models And Year Ranges:

Fits: 2002-2021 Rear Navistar International 4100, 4200, 4300, 4400, MV607 And MV607H

Fits: 2002-2021 Rear Navistar International 7300, 7400, 7500, 7600, 7700, HV507, HV513, HV607, GV613, 8500 And 8600

Fits: 1978-1988 Rear Navistar International S Series

Fits: 1987-2012 Rear Navistar International 1400-1652

Fits: 1989-202 Rear Navistar International 2554-2674

Fits: 1989-2004 Rear Navistar International 3000, 3400-3900

Fits: 1989-2003 Rear Navistar International 4500-4900

Fits: 1988-2003 Rear Navistar International 7100, 8100-8300

Fits: To 2004 Rear Navistar International Amtran Genesis, Amtran FE And RE; IC, CE, FE And RE

Fits: Rear Navistar International Paystar 5000

Fits: 1981-2021 Rear Navistar International 9100-9900, Lonestar, Prostar, LT625 And RH613

Fits: Fire Apparatus Pierce (With International Suspension)

Fits: Fire Apparatus Ferrara

Fits: Fire Apparatus Emergency One (With International Suspension)

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 57298574105

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elf
Cuba, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Spot on!
Size: 16.5" Neck 32"-33" Sleeve, Color: Lemon Glaze
Fits really well. Not for fatties. Pale yellow is nice. Collar stays are sewn in and permanent.
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Reviewed in the United States on April 28, 2026
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T. Smith
Draper, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Love these shirts
Size: 18.5" Neck 36"-37" Sleeve, Color: Persian Blue
Beautiful dark blue color. Soft and well made. Comes out of dryer with minimal wrinkles but not starched looking. A little bit of stretch to it. Does not have the neck extender button. It is a slimmer cut through the waistline for those with wider shoulder but not a bigger belly. It is lightweight especially for FL summers but not thin and see through. Great shirt for work.
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Reviewed in the United States on February 7, 2026
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Greg
Chelsea, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Excellent value for a minimum price!
Color: Rose Gold Black
Very nice, attractive watch!
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Reviewed in the United States on April 3, 2026
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Chris Tobin
Massapequa, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Awesome.
Color: Silver Blue Brown
Loved it! I can hardly hear it run, its so quiet! It's very easy to read and looks quite classy. The leather strap has also held up very well to normal wear.
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Reviewed in the United States on April 11, 2026
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G. Nickerson
Louisville, US
โ˜…โ˜…โ˜…โ˜…โ˜… 4
A Great Value for the Time
Color: Rose Gold Black
Beautiful watch that looks far more expensive than it is. The rose gold finish is very attractive, and the black faux leather band goes well with it. It tells time accurately. The only caveat is the date window which is so tiny that it's very difficult to read when not under direct light. I am very pleased with my purchase.
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Reviewed in the United States on April 27, 2025

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