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Freightliner Classic Frame & Chassis

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  • FREE SHIPPING OVER $249
    12 Inch Stainless Under Body Glow Light Bracket W/ 6 Round 3/4 Inch Light Holes

    12 Inch Stainless Under Body Glow Light Bracket W/ 6 Round 3/4 Inch Light Holes

    IOWA CUSTOMS

    $50.99
    12 Inch Underglow Light Bracket SectionCreate a smooth, custom underglow look with this 12 inch polished stainless steel under body light bracket designed for mini button style LED lighting. Built...
    09-1610085
    SKU:
    09-1610085
    Truck Class:
    Universal
    Make:
    Universal Items
    Length Options:
    12 Inch
    Material Options:
    Steel
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • FREE SHIPPING OVER $249
    CSM SS Under Frame Watermelon Light Bracket For Under Frame Marker Lights

    CSM SS Under Frame Watermelon Light Bracket For Under Frame Marker Lights

    CHROME SHOP MAFIA

    $106.99
    Under Frame Light Bracket By Chrome Shop Mafia* High Quality Frame Light Brackets* 304 Stainless Steel* For Mounting Watermelon Lights Under Frame* Single Holder* Hardware Not Included * Sold...
    09-16100069
    SKU:
    09-16100069
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $106.99
    Qty in Cart: 0
    Price:
    $106.99
    Subtotal:
  • CSM 66 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 With 70 Inch Sleeper Panels

    CSM 66 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 With 70 Inch Sleeper Panels

    CHROME SHOP MAFIA

    $99.99
    66 Inch Light Bracket Mounts To Bottom Of 70 Inch Sleeper Panel Flange By Chrome Shop MafiaThis Chrome Shop Mafia 66-inch light bracket mounts to the bottom flange of 70-inch sleeper panels and...
    09-160200011
    SKU:
    09-160200011
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Length Options:
    66 Inch
    Make:
    Universal Items
    Product Type:
    Lighting
    $99.99
    Qty in Cart: 0
    Price:
    $99.99
    Subtotal:
  • FREE SHIPPING OVER $249
    CSM 39 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 W/ 48 Inch Sleeper Panels

    CSM 39 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 W/ 48 Inch Sleeper Panels

    CHROME SHOP MAFIA

    $76.99
    39 Inch Light Bracket Mounts To Bottom Of 48 Inch Sleeper Panel Flange By Chrome Shop Mafia* High Quality Light Bracket* Bulkhead Style Light Holes* Lights And Harness Not Included* Dimensions   - 39...
    09-160200009
    SKU:
    09-160200009
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Length Options:
    39 Inch
    Make:
    Universal Items
    Product Type:
    Lighting
    $76.99
    Qty in Cart: 0
    Price:
    $76.99
    Subtotal:
  • FREE SHIPPING OVER $249
    CSM 36 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 Cab-Cowl Panels

    CSM 36 Inch Light Bracket W/ Bulkhead Style Light Holes For Peterbilt 379/389 Cab-Cowl Panels

    CHROME SHOP MAFIA

    $78.73
    36 Inch Light Bracket Mounts To Bottom Flange Of Peterbilt 379 & 389 Cab-Cowl Panels By Chrome Shop MafiaThese light brackets are 36 inches long and mount to the bottom flange of the cab-cowl panels...
    09-160200007
    SKU:
    09-160200007
    Truck Class:
    Universal
    Make:
    Universal Items
    Length Options:
    36 Inch
    Product Type:
    Lighting
    $78.73
    Qty in Cart: 0
    Price:
    $78.73
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Spiked Screw Cover Size 10/12 - 4 Pack

    Chrome Spiked Screw Cover Size 10/12 - 4 Pack

    UNITED PACIFIC

    $4.54
    Spiked Style Screw CoversCover up ugly size 10/12 screw heads in style with this pack of 4 spiked screw on covers. They are made of chrome plated plastic and fits most trucks.* High Quality Screw...
    09-1560010
    SKU:
    09-1560010
    Truck Class:
    Universal
    Style Options:
    Spike
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    $4.54
    Qty in Cart: 0
    Price:
    $4.54
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Air Horn Mounting Hardware, 4 pack For Air Valve Lever Floor Stand

    Chrome Air Horn Mounting Hardware, 4 pack For Air Valve Lever Floor Stand

    UNITED PACIFIC

    $11.04
    Air Horn Valve Stand Screw Mounting KitMount your chrome floor air horn stand with this pack of 4 bolt Kit. Each bolt is chrome plated and measures 3 inches long.* High Quality Mounting Bolt Kit*...
    09-1516002
    SKU:
    09-1516002
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exterior
    Length Options:
    3 Inch
    Ready To Ship:
    Yes
    $11.04
    Qty in Cart: 0
    Price:
    $11.04
    Subtotal:
  • Steering Box Repair Kit - Replaces TAS000001

    Steering Box Repair Kit - Replaces TAS000001

    DAYTON / DORMAN

    $35.64
    Steering Box Repair Kit With Loaded Lip Seal, Retaining Ring & 3 Dust Seals* High Quality Steering Box Repair Kit* Package Contents: Loaded Lip Seal  - Retaining Ring  - 3 Dust Seals* Seal...
    09-150000007
    SKU:
    09-150000007
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $35.64
    Qty in Cart: 0
    Price:
    $35.64
    Subtotal:
  • FREE SHIPPING OVER $249
    Rubber Gasket For Fender Step - Pair

    Rubber Gasket For Fender Step - Pair

    UNITED PACIFIC

    $8.49
    Fender Step Rubber Gaskets* High Quality Gasket* Made Of Rubber * For Fender Step* Sold As Pair* Warranty On Gasket Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    09-12600004
    SKU:
    09-12600004
    Truck Class:
    Universal
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Hood Parts & Acc.
    $8.49
    Qty in Cart: 0
    Price:
    $8.49
    Subtotal:
  • Minimizer U-Bolt For Fender Brackets - Pack Of 6

    Minimizer U-Bolt For Fender Brackets - Pack Of 6

    MINIMIZER

    $43.18
    U-Bolt For Fender Brackets* High Quality U Bolts* Made Of Stainless Steel* For Minimizer Fender Brackets* Sold As Pack (6)* Warranty On Fender Brackets Against Defects In Workmanship & Material From...
    09-111105
    SKU:
    09-111105
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Rear Fenders
    $43.18
    Qty in Cart: 0
    Price:
    $43.18
    Subtotal:
  • Black Fiberglass Jost 5Th Wheel Cover

    Black Fiberglass Jost 5Th Wheel Cover

    WTI FENDERS

    $327.99
    5th Wheel Cover* Made Of High Quality Black Fiberglass* Fits Jost Wheel Only* Great Asset When Showing Off Your Truck* Cover Up A Greasy Fifth Wheel In Seconds* Designed With Show Trucks In Mind*...
    09-11001
    SKU:
    09-11001
    Truck Class:
    Heavy Duty
    Color:
    Various
    Location:
    Made In USA
    Material Options:
    Fiberglass
    Make:
    Universal Items
    Product Type:
    Exterior
    $327.99
    Qty in Cart: 0
    Price:
    $327.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Stainless Steel Bull Balls Tow Hitch Cover

    Stainless Steel Bull Balls Tow Hitch Cover

    UNITED PACIFIC

    $59.99
    Bull Balls Tow Hitch Cover* High Quality Bull Balls Tow Hitch Cover* Made Of Stainless Steel* Sold Individually* Warranty On Ball Tow Hitch Covers Against Defects In Workmanship & Material From Date...
    09-053004
    SKU:
    09-053004
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Seal Input Shaft For Rockwell RD20145 - Replaces A1205R2592 & 100494

    Seal Input Shaft For Rockwell RD20145 - Replaces A1205R2592 & 100494

    OPP - ORIGINAL PARTS PROGRAM

    $45.15
    Seal Input Shaft* High Quality Seal Tail Shaft* For Rockwell RD20145* Replaces OEM # A1205R2592, 100494* Sold Individually* Warranty On Seal Input Shaft Against Defects In Workmanship & Material From...
    09-05212010
    SKU:
    09-05212010
    Truck Class:
    Universal
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $45.15
    Qty in Cart: 0
    Price:
    $45.15
    Subtotal:
  • FREE SHIPPING OVER $249
    Seal Tail Shaft For Rockwell RD20145 - Replaces A1205P2590

    Seal Tail Shaft For Rockwell RD20145 - Replaces A1205P2590

    OPP - ORIGINAL PARTS PROGRAM

    $48.04
    Seal Tail Shaft* High Quality Seal Tail Shaft* For Rockwell RD20145* Replaces OEM # A1205P2590, 100495* Sold Individually* Warranty On Seal Tail Shaft Against Defects In Workmanship & Material From...
    09-05212009
    SKU:
    09-05212009
    Truck Class:
    Universal
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $48.04
    Qty in Cart: 0
    Price:
    $48.04
    Subtotal:
  • FREE SHIPPING OVER $249
    Seal Pinion For Rockwell RR20145 - Replaces A1205N2588

    Seal Pinion For Rockwell RR20145 - Replaces A1205N2588

    OPP - ORIGINAL PARTS PROGRAM

    $60.99
    Seal Pinion* High Quality Seal Pinion* For Rockwell RR20145* Replaces OEM # A1205N2588, 100263* Sold Individually* Warranty On Seal Pinion Against Defects In Workmanship & Material From Date Of...
    09-05212008
    SKU:
    09-05212008
    Truck Class:
    Universal
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Nut For Pinion & Tail Shaft Rockwell RD-RR2014 - Replaces KIT2637

    Nut For Pinion & Tail Shaft Rockwell RD-RR2014 - Replaces KIT2637

    OPP - ORIGINAL PARTS PROGRAM

    $24.74
    Nut Pinion And Tail Shaft* High Quality Nut Pinion And Tail Shaft* For Rockwell RD-RR2014* Replaces OEM # KIT2637* Sold Individually* Warranty On Nut Pinion And Tail Shaft Against Defects In...
    09-05212007
    SKU:
    09-05212007
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $24.74
    Qty in Cart: 0
    Price:
    $24.74
    Subtotal:
  • FREE SHIPPING OVER $249
    Nut For Input Shaft Rockwell RD20145 - Replaces KIT2638

    Nut For Input Shaft Rockwell RD20145 - Replaces KIT2638

    OPP - ORIGINAL PARTS PROGRAM

    $31.18
    Nut Input Shaft* High Quality Nut Input Shaft* For Rockwell RD20145* Replaces OEM # KIT2638* Sold Individually* Warranty On Nut Input Shaft Against Defects In Workmanship & Material From Date Of...
    09-05212006
    SKU:
    09-05212006
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $31.18
    Qty in Cart: 0
    Price:
    $31.18
    Subtotal:
  • Locking Nut For Input Shaft DSP40-404

    Locking Nut For Input Shaft DSP40-404

    OPP - ORIGINAL PARTS PROGRAM

    $22.76
    Locknut Input Shaft* High Quality Nut Flanged Lock Output Shaft* Rear Input Shaft For Eaton DSP40-404* Replaces OEM # 128049* Sold Individually* Warranty On Locknut Input Shaft Against Defects In...
    09-05212005
    SKU:
    09-05212005
    Position:
    Rear
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $22.76
    Qty in Cart: 0
    Price:
    $22.76
    Subtotal:
  • FREE SHIPPING OVER $249
    Flanged Locking Nut For Pinion RSP40-404

    Flanged Locking Nut For Pinion RSP40-404

    AUTOMANN USA

    $10.20
    Nut Flanged Lock Pinion* High Quality Nut Flanged Lock Output Shaft* Rear Output Shaft For Eaton RSP40-404* Replaces OEM # 127589* Sold Individually* Warranty On Nut Flanged Lock Pinion Against...
    09-05212004
    SKU:
    09-05212004
    Position:
    Rear
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $10.20
    Qty in Cart: 0
    Price:
    $10.20
    Subtotal:
  • Flanged Locking Nut For Rear Output Shaft Replaces 127588

    Flanged Locking Nut For Rear Output Shaft Replaces 127588

    AUTOMANN USA

    $13.38
    Nut Flanged Lock Rear Output* High Quality Nut Flanged Lock Output Shaft* Rear Output Shaft For Eaton DSP40-404* Replaces OEM # 127588* Sold Individually* Warranty On Nut Flanged Lock Output Shaft...
    09-05212003
    SKU:
    09-05212003
    Truck Class:
    Universal
    Position:
    Rear
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $13.38
    Qty in Cart: 0
    Price:
    $13.38
    Subtotal:
  • Total: items /

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Shop Freightliner Classic Suspension and Chassis Parts

When it comes to finding the right Freightliner Classic XL parts to fix your suspension and ride height issues, 4 State Trucks stocks an enormous array of aftermarket replacement options. Whether you are addressing structural fatigue with heavy-duty frame rails and crossmembers or overhauling your front-end geometry with SBA air ride kits and leaf springs, we have the commercial-grade components required for the job. Restore your DOT compliance with high-performance shock absorbers and air valves, or upgrade your chassis utility with secure deck plates and frame steps. Our inventory includes model-specific suspension upgrade components and frame-chassis hardware parts. As you upgrade your frame-rail components, consider adding additional make/model-specific parts: Freightliner Classic fuel tanks, Freightliner classic visor or a new Freightliner Classic battery box. Find everything you need to refurbish and repair your big rig.

Frequently Asked Questions About Freightliner Classic Frame & Chassis

What are the differences between steel and aluminum bumpers for my Freightliner Classic?

Steel bumpers typically weigh 150-200 lbs and offer superior impact resistance and durability, making them ideal for heavy-duty applications and harsh weather conditions. They're generally 30-40% less expensive than aluminum but require regular maintenance to prevent rust. Aluminum bumpers weigh about 60-80 lbs, won't rust, and provide better fuel economy due to weight savings. However, they're more prone to denting and cost significantly more upfront. Most owner-operators choose steel for work trucks and aluminum for show trucks or when weight restrictions are critical.

Will aftermarket bumpers fit my specific Freightliner Classic model year?

Most aftermarket bumpers are designed to fit Freightliner Classic models from 1990-2007, but there are important variations. Pre-2000 models often have different mounting hole patterns and may require adapter brackets. The FLD 112/120 and Classic XL have wider frames that need specific bumper widths (typically 18" or 20" options). Always verify your frame rail width and mounting hole spacing before ordering. Look for bumpers that specify compatibility with your exact model designation (FLC, FLD, or Classic XL) and year range to ensure proper fitment without modifications.

What tools and skills do I need to install a new bumper myself?

Installing a Freightliner Classic bumper requires basic mechanical skills and these tools: 3/4" and 7/8" sockets and wrenches, torque wrench capable of 150-200 ft-lbs, floor jack or forklift to support the bumper weight, and safety equipment. The process typically takes 2-4 hours with a helper. Key challenges include aligning heavy bumpers with mounting holes and achieving proper torque specs (usually 150-175 ft-lbs for frame bolts). Many customers report difficulty with rusted or seized bolts on older trucks. Having penetrating oil and possibly a torch available is recommended. Professional installation typically costs $200-400 if you prefer to avoid these challenges.

What finish options hold up best against road salt and weather?

Chrome-plated steel remains the most popular choice, offering excellent appearance when maintained but requiring regular polishing and can show pitting after 3-5 years in salt states. Powder-coated finishes in black or custom colors provide superior corrosion resistance and typically last 5-7 years without significant maintenance. Polished aluminum naturally resists corrosion but shows water spots and requires frequent cleaning. For maximum durability in harsh conditions, consider bumpers with e-coating underneath chrome plating or opt for heavy-duty powder coating with a clear protective topcoat. Stainless steel options are available but typically cost 2-3 times more than standard chrome.

Can I mount accessories like light bars or air hoses to aftermarket bumpers?

Most quality aftermarket bumpers come pre-drilled for standard accessories or include mounting provisions. Common mounting points include centered holes for light bars (typically supporting up to 50" bars), side mounting tabs for work lights or air hose hangers, and tow hook or shackle mounting points rated for 20,000-30,000 lbs. When selecting a bumper, verify it has the specific mounting features you need - not all bumpers include fog light provisions or airline holes. Adding holes after purchase is possible but may void warranties and compromise chrome plating. Many bumpers also offer optional bolt-on accessories like step plates, license plate holders, and bumper guards that don't require drilling.


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