1978 - 2012 Navistar International 3000-8000, IC CE, 1400-1754, 1823-2674, 4500-4900 and 7100 Front Leaf Spring 55-140
SKU: 87563117572

1978 - 2012 Navistar International 3000-8000, IC CE, 1400-1754, 1823-2674, 4500-4900 and 7100 Front Leaf Spring 55-140

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Description

1978 - 2012 Navistar International 3000-8000, IC CE, 1400-1754, 1823-2674, 4500-4900 and 7100 Front Leaf Spring 55-140*Diagram Spring May Differ From Actual Spring* Number of Leaves 6 (6 PD) Leaf Spring Width 3" A Leaf Spring Length: 25" B Leaf Spring Length: 25" C Leaf Spring Arch: 3 3 4" D Leaf Spring Pack Thickness: 3 1 16" Leaf Spring Capacity: 3,500 lbs. Leaf Spring OEM Number: 1661421C91 Leaf Spring Eye Bushings: Front RB 75 Rear RB 75 Leaf Spring Material: 6 . 423, Pad 1 . 499 Location Front Verify the OEM part number and measurements to confirm compatibility

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 6 (6/PD)
  • Leaf Spring Width - 3"
  • A - Leaf Spring Length: 25"
  • B - Leaf Spring Length: 25"
  • C - Leaf Spring Arch: 3-3/4"
  • D - Leaf Spring Pack Thickness: 3-1/16"
  • Leaf Spring Capacity: 3,500 lbs.
  • Leaf Spring OEM Number: 1661421C91
  • Leaf Spring Eye Bushings: Front RB-75 / Rear RB-75
  • Leaf Spring Material: 6/.423, Pad 1/.499
  • Location - Front

 

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

 

Leaf spring 55-140 is the front leaf spring for Navistar International 3000, 3400, 3600, 3700, 3800, IC CE, 1452-1754, 1823-1955, 2124-2155, 1400-1652, 2554-2674, 4500-4900 and 7100 . The spring is a 3" wide, is a 6 leaf spring with 1 pad and has a capacity of 3,500 lbs. The OEM part number is 1661421C91.


Models And Year Ranges:

Fits: 1978-1988 Front Navistar International 1452-1754 (5,000 lb. - 8,000 lb. Axles Only)

Fits: 1978-1988 Front Navistar International 1823-1955 (Except 4x4 And 6x6) (5,000 lb. - 8,000 lb. Axles Only)

Fits: 1978-1988 Front Navistar International 2124-2155 (5,000 lb. - 8,000 lb. Axles Only)

Fits: 1989-2004 Front Navistar International 3000, 3400, 3600, 3700 And 3800 (6,000 lb. - 8,000 lb. Axles Only)

Fits: 2000-2004 Front Navistar International IC CE (6,000 lb. - 8,000 lb. Axles Only)

Fits: 1987-2012 Front Navistar International 1400-1652 (6,000 lb. - 8,000 lb. Axles Only)

Fits: 1989-2002 Front Navistar International 2554-2674 (6,000 lb. - 8,000 lb. Axles Only)

Fits: 1989-2002 Front Navistar International 4500-4900 (Except 4x4 And 6x6) (6,000 lb. - 8,000 lb. Axles Only)

Fits: 1989-2000 Front Navistar International 7100 (6,000 lb. - 8,000 lb. Axles Only)

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SKU: 87563117572

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James C. Mcclaran, Jr.
New York, US
★★★★★ 4
Four Stars: Insightful and Impactful Reading
Format: Hardcover
This book provides clarity in human relationships pertaining to workplace, family, and social circles. Author Mel Robbins explains the human tendency of needing to belong and bond, having personal freedoms and space to make informed choices, and providing coping strength to not feel over burdened due to work or perceived social obligations or human stereotypes. "Let Them", "Let Me" is a series of strategies/skills that help one regain focus on finite time and energies to have more productive personal relationships and work outcomes. The book teaches one to de-prioritize things and channel emotions into actionable goals to set healthy boundaries in selection of friends, career paths, and effectively resolving conflicts. Some chapters are overly redundant (and precludes a fifth star rating); however, it's a worthwhile book that definitively helps me set more impactful goals in 2026 and beyond.
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Reviewed in the United States on January 31, 2026
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Paige
Lexington, US
★★★★★ 5
Love this book!!
I just finished *The Let Them Theory* by Mel Robbins, and I can honestly say it completely shifted my mindset. The concept is so simple—“let them”—but it’s incredibly powerful. Instead of stressing over what other people think, say, or do, this book teaches you to let go of that control and focus on yourself instead. What I loved most is how practical it is. It’s not full of complicated advice—it’s something you can actually apply in real life, whether it’s relationships, friendships, or everyday stress. I found myself reflecting on so many situations where I was wasting energy trying to control things I simply can’t. Since reading it, I feel lighter, less anxious, and more in control of my own life. It’s honestly a reminder that peace comes from within, not from trying to manage everyone else. If you’re someone who overthinks, people-pleases, or struggles with letting go, I highly recommend this book. It’s simple, but it hits deep.
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Reviewed in the United States on March 26, 2026
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kmurph31
Cuba, US
★★★★★ 5
NON FICTION IS A GREAT WAY TO LISTEN WHILE YOU DRIVE! TRY AUDIBLE!
Format: Audiobook
LET THEM AUDIBLE NON-FICTION INSPIRATIONAL BOOK ON LISTENING TO MEL ROBBINS MOTIVATIONAL ADVICE MAKES MY DRIVING DESTINATIONS ENJOYABLE! I had something like 24 AUDIBLE CREDITS that have built up because I'm a visual person that loves to read. I've had the membership for over ten years and I only like certain NON FICTION SELF DEVELOPMENT books which I listen to Memoirs, Self help, but never fiction books, because my imagination is more vivid when I read. I always either listen to my podcasts on Spotify or NON-FICTION on AUDIBLE which is owned by Amazon. I can't drive anywhere without my Podcasts or very few Non-Fiction Titles that interest me, but I have had those credits and I love MEL ROBBINS so I decided to try it on AUDIBLE. My friends who read that listen to fiction on AUDIO understood why I bought the same fictional title and I had already loved reading it on my Kindle. It was a favorite lifetime reading experience and I own many of the same KINDLE & AUDIBLE versions but I noticed that fiction book that it was one of the most beautifully written books that when I went to listen to it, I quickly gave up because it was bland. I have been told by more frequent readers like myself who listen to the Audio version and recommend it to me on Audio since they enjoyed it better have said listening to fiction is a skill that you have to develop, so I stick to NON FICTION and I need to listen to something while I'm driving so I buy the Kindle Version & the AUDIBLE and it makes my driving to destinations shorter.v That's why I have Spotify because there's two favorite podcasts but I pay extra for no commercials and now my top favorite podcast has commercials which I 'm considering cancelling because the reason I pay extra is because the commercials drive me crazy so now Spotify says it's up to the podcast. The reason I've been a member since 2018, is because it is synced to the Bluetooth, in my car and the podcasts don't require Cell towers so you don't get the buffering that I do with Audible in areas where there aren't Cell towers which we call them dead zones. I'm recommending this AUDIBLE PURCHASE called, "LET THEM," because MEL ROBBINS is a new motivational author to me, and she wrote the book which she has some fascinating inspirational content, that I have learned some ideas to improve my life. She is a fantastic narrator in her soothing voice. One nice thing about AUDIBLE is they are extremely friendly and if you don't like the AUDIO BOOK Listening experience, you can return it, which you can't do with the KINDLE Books. so I have had to return something only twice in fifteen years, since I usually love what I purchase. I do recommend this book on AUDIBLE to listen to or if you don't have a membership they used to have a free trial and a free book if you're a new member. But I'm not sure, but however medium you choose this is a FAVORITE and it's a bestseller that I can promise you will love it, as well. It has a very high rating of tens of thousands of five star ratings which is even more evident that it's a Spectacular choice!
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Reviewed in the United States on July 24, 2025
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DM
Grantham, US
★★★★★ 5
Book of life
Format: Hardcover
This book is a fantastic read, I think this is a book everyone should read. Very insightful and informative book for life.
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Reviewed in the United States on May 15, 2026
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Chels marie
Draper, US
★★★★★ 5
HIGHLY RECOMMEND
Format: Audiobook
I love Mel Robbin’s and this audiobook gave me a different perspective on my life. I would highly recommend it’s so easy to understand and it’s so enjoyable and enlightening to listen to.
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Reviewed in the United States on May 15, 2026

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