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Kenworth Frame & Chassis

Reinforce your Kenworth's core with 4 State Trucks' superior Kenworth semi truck frame and chassis components. Count on us for high-grade Kenworth frame and chassis parts that boost structural integrity and durability, guaranteeing your rig handles every payload with unwavering stability. From critical replacements to performance-enhancing upgrades, our parts ensure your Kenworth semi truck's foundation remains rock-solid, making each journey safer and more dependable. Choose 4 State Trucks to fortify your Kenworth's backbone, providing the sturdy base needed for optimal performance and longevity. Whether you're navigating city streets or conquering long-haul routes, our frame and chassis components give you the confidence to tackle any challenge, load after load.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Differential Pinion Nut M39 X 1.5 Thread X 2.15 Inch A/F

    Differential Pinion Nut M39 X 1.5 Thread X 2.15 Inch A/F

    AUTOMANN USA

    $15.02
    Differential Pinion Nut 40X1241 And TDA40X1241* High Quality Pinion Nut* Dimensions:  - 2.15 Inch A/F  - 2.63 Inch O.D.* Sold Individually* Warranty On Pinion Nuts Against Defects In Workmanship &...
    09-05210030
    SKU:
    09-05210030
    Material Options:
    Steel
    Diameter Options:
    2 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $15.02
    Qty in Cart: 0
    Price:
    $15.02
    Subtotal:
  • 1.5 Inch Sleeve Bushing 2 ID X 2.1875 OD X 1.5 Inch OAL For Reyco

    1.5 Inch Sleeve Bushing 2 ID X 2.1875 OD X 1.5 Inch OAL For Reyco

    AUTOMANN USA

    $18.16
    Reyco Sleeve Bushing Replaces 70274201* High Quality Sleeve Bushing* Dimensions:  - 2 Inch ID   - 2.1875 Inch OD   - 1.5 Inch Length* Sold Individually* Warranty On Sleeve Bushings Against Defects In...
    09-05200003
    SKU:
    09-05200003
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    2 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $18.16
    Qty in Cart: 0
    Price:
    $18.16
    Subtotal:
  • Differential Pinion Nut M45 X 1.5 Thread X 2.35 Inch A/F

    Differential Pinion Nut M45 X 1.5 Thread X 2.35 Inch A/F

    AUTOMANN USA

    $28.11
    Differential Pinion Nut Replaces 40X1242, TDA40X1242Secure your differential assembly with confidence using this M45 x 1.5 Pinion Nut. Its 2.35-inch A/F and 3.062-inch O.D. provide reliable clamping...
    09-05210028
    SKU:
    09-05210028
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    2 1/4 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $28.11
    Qty in Cart: 0
    Price:
    $28.11
    Subtotal:
  • Alignment Washer 2 3/4 Inch OD x 1/4 Inch Thick For Reyco, Transpro

    Alignment Washer 2 3/4 Inch OD x 1/4 Inch Thick For Reyco, Transpro

    AUTOMANN USA

    $22.02
    Alignment Washer Replaces 4600* High Quality Washer* Dimensions:  - 1.031 Inch I.D.  - 2.75 Inch O.D.  - 0.25 Inch Thickness* Sold Individually* Warranty On Washers Against Defects In Workmanship &...
    09-05200013
    SKU:
    09-05200013
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    1 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $22.02
    Qty in Cart: 0
    Price:
    $22.02
    Subtotal:
  • Axle Raiser 5 Inch W/ 5.5 Degree Camber

    Axle Raiser 5 Inch W/ 5.5 Degree Camber

    AFTERMARKET

    $57.99
    5 Inch Axle Raiser - 5.5 Degree* High Quality Axle Raiser* 5/8 Inch Diameter* 5.5 Degree* Made In USA* Sold Individually* Warranty On Axle Raisers Against Defects In Workmanship & Material From Date...
    09-05090032
    SKU:
    09-05090032
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Length Options:
    5 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • 3/8 Inch-16 X 1.88 Inch Brake Shoe Set Screw

    3/8 Inch-16 X 1.88 Inch Brake Shoe Set Screw

    AUTOMANN USA

    $6.35
    Brake Shoe Set Screw Replaces 26X1030* High Quality Set Screw* Dimensions:  - 1.188 Inch Length  - 0.892 Inch Thread Length* Threads: 3/8 Inch-16* Sold Individually* Warranty On Set Screws Against...
    09-05170296
    SKU:
    09-05170296
    Material Options:
    Steel
    Length Options:
    1 1/8 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $6.35
    Qty in Cart: 0
    Price:
    $6.35
    Subtotal:
  • TPHD Type 12 Air Brake Diaphragm - 5.5 Inch OD

    TPHD Type 12 Air Brake Diaphragm - 5.5 Inch OD

    TURNPIKE TRUCK TRIM

    $5.07
    Replacement 5.5 Inch Air Chamber Diaphragm - Type 12* High Quality Diaphragm* Dimensions:  - 1.295 Inch Height   - 5.5 Inch Outer Diameter* Type 12* Sold Individually* Warranty On Diaphragms Against...
    09-05170260
    SKU:
    09-05170260
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Diameter Options:
    5 1/2 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.07
    Qty in Cart: 0
    Price:
    $5.07
    Subtotal:
  • TPHD Type 20 Air Brake Diaphragm - 6.55 Inch OD

    TPHD Type 20 Air Brake Diaphragm - 6.55 Inch OD

    TURNPIKE TRUCK TRIM

    $4.35
    Replacement 6.55 Inch Air Chamber Diaphragm - Type 20* High Quality Diaphragm* Dimensions:  - 1.295 Inch Height  - 6.55 Inch Outer Diameter* Type 20* Sold Individually* Warranty On Diaphragms Against...
    09-05170258
    SKU:
    09-05170258
    Material Options:
    Plastic/Poly
    Diameter Options:
    6 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $4.35
    Qty in Cart: 0
    Price:
    $4.35
    Subtotal:
  • TPHD Type 16 Air Brake Diaphragm - 6.16 Inch OD

    TPHD Type 16 Air Brake Diaphragm - 6.16 Inch OD

    TURNPIKE TRUCK TRIM

    $5.08
    Replacement 6.16 Inch Air Chamber Diaphragm - Type 16* High Quality Diaphragm* Dimensions:  - 1.295 Inch Height  - 6.16 Inch Outer Diameter* Type 16* Sold Individually* Warranty On Diaphragms Against...
    09-05170259
    SKU:
    09-05170259
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Diameter Options:
    6 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.08
    Qty in Cart: 0
    Price:
    $5.08
    Subtotal:
  • Fifth Wheel Bracket Pin & Bushing Liner Kit For Fontaine

    Fifth Wheel Bracket Pin & Bushing Liner Kit For Fontaine

    OPP - ORIGINAL PARTS PROGRAM

    $167.99
    Fifth Wheel Repair Kit - Pin and Bushing Liners for LWB, MTB, BSM, ATB, and PMA Brackets* High Quality Fifth Wheel Repair Kit* Includes:  - Bracket Pins  - Bushing Liners  - 2 Piece Bushings  -...
    09-05110245
    SKU:
    09-05110245
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $167.99
    Qty in Cart: 0
    Price:
    $167.99
    Subtotal:
  • TPHD Type 36 Long Stroke Air Brake Diaphragm - 7.875 Inch OD

    TPHD Type 36 Long Stroke Air Brake Diaphragm - 7.875 Inch OD

    TURNPIKE TRUCK TRIM

    $7.62
    Replacement 7.875 Inch Air Chamber Diaphragm - Type 36* High Quality Diaphragm* Dimensions:  - 1.905 Inch Height  - 7.875 Inch Outer Diameter* Type 36* Sold Individually* Warranty On Diaphragms...
    09-05170255
    SKU:
    09-05170255
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Diameter Options:
    8 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $7.62
    Qty in Cart: 0
    Price:
    $7.62
    Subtotal:
  • TPHD Type 9 Long Stroke Air Brake Diaphragm - 5 Inch OD

    TPHD Type 9 Long Stroke Air Brake Diaphragm - 5 Inch OD

    TURNPIKE TRUCK TRIM

    $5.08
    Replacement 5 Inch Air Chamber Diaphragm - Type 9* High Quality Diaphragm* Dimensions:  - 1.375 Inch Height  - 5 Inch Outer Diameter* Type 9* Sold Individually* Warranty On Diaphragms Against Defects...
    09-05170252
    SKU:
    09-05170252
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Diameter Options:
    5 Inch
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $5.08
    Qty in Cart: 0
    Price:
    $5.08
    Subtotal:
  • Cross Tube End Clip 5/8 - 11 Thread X 1.5 Inch

    Cross Tube End Clip 5/8 - 11 Thread X 1.5 Inch

    AUTOMANN USA

    $9.24
    TRW Friction Clamp Type Cross Tube End Clip* High Quality Cross Tube End Clip* Dimensions:  - 3 Inch Length  - 1 1/2 Inch Diameter* Thread- 5/8 Inch-11* Made In USA* Sold Individually* Warranty On...
    09-05090033
    SKU:
    09-05090033
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $9.24
    Qty in Cart: 0
    Price:
    $9.24
    Subtotal:
  • 36 Inch Fifth Wheel Graphite Lube Disk W/ Steel Retention Ring

    36 Inch Fifth Wheel Graphite Lube Disk W/ Steel Retention Ring

    AFTERMARKET

    $89.99
    Fifth Wheel Graphite Lube DiskThe 36-inch Fifth Wheel Graphite Lube Disk keeps things smooth by releasing graphite as it wears. Its black design with a retaining ring ensures durability. Perfect for...
    09-05110034
    SKU:
    09-05110034
    Truck Class:
    Heavy Duty
    Diameter Options:
    36 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $89.99
    Qty in Cart: 0
    Price:
    $89.99
    Subtotal:
  • Pull Handle - Replaces KITPUL3000 For Fontaine 3000 Series

    Pull Handle - Replaces KITPUL3000 For Fontaine 3000 Series

    AFTERMARKET

    $75.99
    Fontaine 3000 Series Pull Handle Replacement* High Quality Handle* Made In USA* Sold Individually* Warranty On Handles Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    09-05110031
    SKU:
    09-05110031
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $75.99
    Qty in Cart: 0
    Price:
    $75.99
    Subtotal:
  • Auxiliary Spring - 58947000 For Hendrickson

    Auxiliary Spring - 58947000 For Hendrickson

    AFTERMARKET

    $104.99
    Rear Hendrickson Spring Insulator* High Quality Auxiliary Spring* Dimensions:  - 4 Inch Height  - Hole Size- 2.75 Inch X 0.625 Inch* Made In USA* Sold Individually* Warranty On Auxiliary Springs...
    29-05100123
    SKU:
    29-05100123
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Product Type:
    Frame & Chassis
    $104.99
    Qty in Cart: 0
    Price:
    $104.99
    Subtotal:
  • Air Spring Rolling Lobe With Plastic Base - 9643, 69658, 58995002 For Hendrickson

    Air Spring Rolling Lobe With Plastic Base - 9643, 69658, 58995002 For Hendrickson

    AFTERMARKET

    $285.99
    Hendrickson Rolling Lobe Air SpringExperience a smooth ride with the Rolling Lobe Air Spring With Plastic Base. Engineered to keep trucks moving smoothly, it minimizes vibration and maintains ride...
    29-05100238
    SKU:
    29-05100238
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $285.99
    Qty in Cart: 0
    Price:
    $285.99
    Subtotal:
  • Paralift Beam Assembly For Hendrickson

    Paralift Beam Assembly For Hendrickson

    AFTERMARKET

    $506.99
    Choose Option(s) to see description.Paralift Beam Assembly - Replaces D147841 For HendricksonHendrickson Beam Assembly For Driver Side Inboard or Passenger Outboard* High Quality Beam Assembly*...
    PPR_298967
    SKU:
    PPR_298967
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $506.99
    Qty in Cart: 0
    Price:
    $506.99
    Subtotal:
  • Brass Brake Lining Bolts With Kep Nuts W/ Thread Options

    Brass Brake Lining Bolts With Kep Nuts W/ Thread Options

    AUTOMANN USA

    $67.99 - $191.99
    Choose Option(s) to see description.1 Inch Brass Brake Lining Bolts 1/4 Inch - 28 Thread W/ Kep NutsBrake Shoe Lining Bolts Replaces E634X, E918X* High Quality Brake Lining Bolt* Brass* 1 Inch...
    PPR_298970
    SKU:
    PPR_298970
    Material Options:
    Brass
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $67.99 - $191.99
    Qty in Cart: 0
    Price:
    $67.99 - $191.99
    Subtotal:
  • Limited Quantity Available
    Aluminum Shim Wedges

    Aluminum Shim Wedges

    AUTOMANN USA

    $6.94 - $25.43
    Achieve precise alignment and reliable adjustment with Aluminum Shim Wedges, available in a wide range of sizes and angles to meet your heavy-duty truck needs. Choose from options including 1.5 x 4...
    PPR_298965
    SKU:
    PPR_298965
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $6.94 - $25.43
    Qty in Cart: 0
    Price:
    $6.94 - $25.43
    Subtotal:
  • Total: items /

Adding your products to cart

Find the premium, aftermarket parts for your Kenworth Frame & Chassis. This category has everything you need for your Kenworth's frame, chassis, and suspension. Find air tanks, shocks, bushings, leaf springs, and more to maintain your truck's structural integrity and smooth ride for models like the T800, W900, and T660. Replacement Parts: Direct-fit OEM replacements for seamless installation. Performance Upgrades: Stiffer leaf springs and adjustable shocks for better handling and weight capacity. Custom Accessories: stainless trim, fender flares, and mud flaps to enhance style and protection. Whether you're doing repairs, boosting performance, or customizing your rig's look, this category has you covered.

Frequently Asked Questions About Kenworth Frame & Chassis

What years and models are compatible with your Kenworth frame and chassis parts?

Our Kenworth frame and chassis components are designed for W900, T800, T880, T680, and T660 models. Most parts fit 1985-current year models, but compatibility varies by specific component. Always check the product description for exact year ranges, or contact our team with your OEM for guaranteed fitment. We maintain detailed compatibility charts for each product to ensure proper installation.

Are these aftermarket or OEM Kenworth frame parts, and what's the quality difference?

We carry both genuine OEM Kenworth parts and high-quality aftermarket alternatives. OEM parts guarantee exact factory specifications and fitment. Our aftermarket options are manufactured to meet or exceed OEM standards, often using upgraded materials like 304 stainless steel instead of mild steel. All aftermarket suppliers are vetted for quality control and many offer lifetime warranties on their products.

What tools and experience level do I need to install frame-mounted accessories?

Most frame-mounted accessories require basic hand tools, a drill with metal bits, and safety equipment. Installation difficulty ranges from simple bolt-on parts (30-60 minutes) to more complex items requiring cutting or welding. Professional installation is recommended for structural modifications or if you lack experience with heavy truck maintenance.

What finish options are available and how do they hold up against road salt and weather?

Common finishes include chrome-plated steel, polished stainless steel, powder-coated steel, and raw steel for custom painting. Stainless steel offers the best corrosion resistance without maintenance. Chrome requires regular cleaning to prevent pitting. Powder coating provides excellent protection when properly applied. For trucks operating in salt-heavy regions, we recommend stainless steel or powder-coated options with zinc primer.

Do frame extensions or modifications affect my truck's warranty or DOT compliance?

Frame modifications can potentially void manufacturer warranties if not performed to factory specifications. Always consult your warranty documentation before making structural changes. For DOT compliance, ensure any modifications maintain proper weight distribution and don't exceed manufacturer GVWR ratings. Frame extensions must be properly reinforced and may require engineering certification in some states. We recommend consulting a certified truck mechanic or frame shop for major modifications.


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