1987 - 2006 Navistar International 1000, 2000, 4000 and 7000 Front Leaf Spring 55-142
SKU: 7005303936

1987 - 2006 Navistar International 1000, 2000, 4000 and 7000 Front Leaf Spring 55-142

$137.47 $152.75
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Description

1987 - 2006 Navistar International 1000, 2000, 4000 and 7000 Front Leaf Spring 55-142*Diagram Spring May Differ From Actual Spring* Number of Leaves 7 (2PD 7) Leaf Spring Width 4" A Leaf Spring Length: 25" B Leaf Spring Length: 29" C Leaf Spring Arch: 4 3 4" D Leaf Spring Pack Thickness: 3 3 4" Leaf Spring Capacity: 4,350 lbs. Leaf Spring OEM Number: 1661498C91 Leaf Spring Eye Bushings: Front RNK Rear RNK Leaf Spring Material: Pad 2 . 447, 7 . 401 Location Front 9,000 lb. 20,000 lb. Axles Only Verify the OEM part number and

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 7 (2PD/7)
  • Leaf Spring Width - 4"
  • A - Leaf Spring Length: 25"
  • B - Leaf Spring Length: 29"
  • C - Leaf Spring Arch: 4-3/4"
  • D - Leaf Spring Pack Thickness: 3-3/4"
  • Leaf Spring Capacity: 4,350 lbs.
  • Leaf Spring OEM Number: 1661498C91
  • Leaf Spring Eye Bushings: Front RNK / Rear RNK
  • Leaf Spring Material: Pad 2/.447, 7/.401
  • Location - Front
  • 9,000 lb. - 20,000 lb. Axles Only

 

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

 

Leaf spring 55-142 is the front leaf spring on 1987 - 2006 Navistar International 1000, 2000, 4000 and 7000 heavy duty trucks. The spring is 4" wide, is a 7 leaf spring with 2 pads and has a capacity of 4,350 lbs. The OEM part number is 1661498C91.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 7005303936

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4.5 ★★★★★
Based on 208 reviews
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Product Reviews
C
Verified Purchase
Carb was beautiful once I got it tune in, cranks great runs smooth I would buy it again if needed
Natrona Heights, US
★★★★★ 5
For motorcycles
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
Great stuff, good price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
J
Verified Purchase
JNL
Dallas, US
★★★★★ 5
The best lower unit gear oil I have used
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
I have been boating my whole life, this is by far the best gear oil. I use this in my Johnson 115 even though this is technically made by Mercury. I seem to get less if any water intrusion into my gearcase with this oil. If there is any, the oil emulsifies the water and continues to protect the gears. I have had better luck with this than Pennzoil marine or others. Highly recommend. It is a blue color and easy to drain and fill.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
D
Verified Purchase
Debra
Omaha, US
★★★★★ 5
Great
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
Great lube for the boat
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
J
Verified Purchase
Joshua Murray
Massapequa, US
★★★★★ 5
recommend
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
great price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
C
Verified Purchase
Christopher C.
San Leandro, US
★★★★★ 4
Does not come with a pump.
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
The Good: Changing the fluid in the lower unit is a very easy DIY job. This can save you hundreds of dollars each year by doing it yourself. The Bad: You need a special pump to change the oil, and sometimes it comes with the gear lube. Unfortunately this product did not come with it. Luckily my neighbor had an extra one from changing the lube a different boat laying around and was able to use that. The Ugly: If you have to go get the pump, that could cost a few extra dollar but is just an extra nuisance. The pumps are interchangable but you just need to clean it between uses (DON'T MIX DIFFERENT OIL BRANDS)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 28, 2025

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