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Peterbilt 388 Frame Crossmembers & Covers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 57 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces A3102T3452

    57 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces A3102T3452

    AFTERMARKET

    $158.99
    57 Inch C To C Cross Tube Replaces A3102T3452* High Quality Cross Tube* 57.00 Inch Length* 1.50 Inch O.D.* 1-1/8 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090114
    SKU:
    29-05090114
    Material Options:
    Steel
    Length Options:
    57 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $158.99
    Qty in Cart: 0
    Price:
    $158.99
    Subtotal:
  • 60.56 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR107

    60.56 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR107

    AFTERMARKET

    $150.99
    60.56 Inch C To C Cross Tube Replaces 120TR107* High Quality Cross Tube* 60.56 Inch Length* 1.50 Inch OD* 1-1/8 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090112
    SKU:
    29-05090112
    Truck Class:
    Universal
    Length Options:
    60 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $150.99
    Qty in Cart: 0
    Price:
    $150.99
    Subtotal:
  • 58.50 Inch Cross Tube - 1-1/2 In OD, 1-1/8 In -12 Ends Replaces A3102X3456

    58.50 Inch Cross Tube - 1-1/2 In OD, 1-1/8 In -12 Ends Replaces A3102X3456

    AFTERMARKET

    $158.99
    58.50 Inch C To C Cross Tube Replaces A3102X3456, L18RT0699A11Upgrade your truck's suspension components with this 58.50 Inch Cross Tube, designed to replace part number A3102X3456, L18RT0699A11...
    29-05090110
    SKU:
    29-05090110
    Material Options:
    Steel
    Length Options:
    58 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $158.99
    Qty in Cart: 0
    Price:
    $158.99
    Subtotal:
  • 53.50 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces A3102Z3874

    53.50 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces A3102Z3874

    AFTERMARKET

    $261.99
    53.50 Inch C To C Cross Tube Replaces A3102Z3874* High Quality Cross Tube* 2.00 Inch OD * 53.50 Inch Length * With 1-1/4 Inch -12 Ends* Made In USA* Sold Individually* Warranty On Cross Tubes Against...
    29-05090104
    SKU:
    29-05090104
    Length Options:
    53 Inch
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $261.99
    Qty in Cart: 0
    Price:
    $261.99
    Subtotal:
  • 62.25 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces A3102Y3483

    62.25 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces A3102Y3483

    AFTERMARKET

    $190.99
    62.25 Inch C To C Cross Tube Replaces A3102Y3483* High Quality Cross Tube* 62.25 Inch Length* 2.00 Inch OD* 1-1/8 Inch-12* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090106
    SKU:
    29-05090106
    Truck Class:
    Universal
    Length Options:
    62 1/4 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $190.99
    Qty in Cart: 0
    Price:
    $190.99
    Subtotal:
  • Wear Washer - 2 Inch ID For Peterbilt Rear Air Leaf

    Wear Washer - 2 Inch ID For Peterbilt Rear Air Leaf

    AUTOMANN USA

    $14.95
    Peterbilt Rear Air Leaf 0.10 Inch Thick Wear WasherExtend the life of your suspension and pivot components with this high-quality Wear Washer featuring a 2-inch inner diameter. Designed to handle the...
    01-05250002
    SKU:
    01-05250002
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $14.95
    Qty in Cart: 0
    Price:
    $14.95
    Subtotal:
  • HD Lock Washers

    HD Lock Washers

    AUTOMANN USA

    $0.10 - $1.01
    Choose Option(s) to see description.3/4 Inch HD Lock WasherHD Lock Washer For 3/4 Inch Bolt* High Quality Lock Washer* 1/4 Inch Width* 7/32 Inch Thickness* 3/4 Inch Size* Sold Individually * Warranty...
    PPR_206760
    SKU:
    PPR_206760
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $0.10 - $1.01
    Qty in Cart: 0
    Price:
    $0.10 - $1.01
    Subtotal:
  • Bronze Bushing, 1-1/4 OD X 1 ID Inch

    Bronze Bushing, 1-1/4 OD X 1 ID Inch

    AUTOMANN USA

    $11.01 - $13.86
    Choose Option(s) to see description.3-1/2 Inch Bronze Bushing, 1-1/4 OD X 1 ID Inch3-1/4 Bronze Bushing With 1-1/4 Inch OD & 1 Inch ID* High Quality Bushing* Bronze* 3.50 Inch Length* 1.25 Inch O.D.*...
    PPR_206200
    SKU:
    PPR_206200
    Material Options:
    Bronze
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $11.01 - $13.86
    Qty in Cart: 0
    Price:
    $11.01 - $13.86
    Subtotal:
  • Wear Pad Washer - 4.50 OD X 2.12 ID X 0.156 Inch Thick

    Wear Pad Washer - 4.50 OD X 2.12 ID X 0.156 Inch Thick

    AUTOMANN USA

    $17.00
    Wear Pad Washer Replaces E9441, E9441A, 1160519B301* High Quality Wear Pad Washer* 4.50 Inch O.D.* 2.12 Inch I.D.* 0.156 Inch Thickness* Plastic/Nylon* Sold Individually * Warranty On Wear Pad...
    09-05250094
    SKU:
    09-05250094
    Diameter Options:
    2 Inch
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $17.00
    Qty in Cart: 0
    Price:
    $17.00
    Subtotal:
  • Hex Head Flange Bolt 1/2-13 X 1 Inch Grade 5

    Hex Head Flange Bolt 1/2-13 X 1 Inch Grade 5

    AUTOMANN USA

    $2.31
    Grade 5 Flange Bolt With 1/2 Inch Diameter* High Quality Flange Bolt* 1/2 Inch Bolt Diameter* 1 Inch Bolt Length* Bolt Type- Hex Bolts* Thread- 13* Pitch- Coarse* Grade- 5* Sold Individually *...
    09-05250080
    SKU:
    09-05250080
    Diameter Options:
    1/2 Inch
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $2.31
    Qty in Cart: 0
    Price:
    $2.31
    Subtotal:
  • Universal Joint Strap Kit Fits Bearing Cap 1.625 Inch

    Universal Joint Strap Kit Fits Bearing Cap 1.625 Inch

    AUTOMANN USA

    $12.46
    Universal Joint Strap Kit Fits Bearing Cap 1.625 Inch For SPL90/100* High Quality Universal Joint Strap Kit* 3/8 Inch-24 x .75 Inch Length* Fits Bearing Cap 1.625 Inch* 2.312 Inch C/L to C/L* Crosses...
    09-05210022
    SKU:
    09-05210022
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $12.46
    Qty in Cart: 0
    Price:
    $12.46
    Subtotal:
  • Adjustment Rod Kit For 5th Wheel Frontaine 3000 Series

    Adjustment Rod Kit For 5th Wheel Frontaine 3000 Series

    AFTERMARKET

    $66.99
    Adjustment Rod Kit Replaces KITROD3000* High Quality Rod Kit* 41.25 Inches Length* Adjustment* Made In USA* Sold Individually * Warranty On Rod Kits Against Defects In Workmanship & Material From...
    09-05110029
    SKU:
    09-05110029
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $66.99
    Qty in Cart: 0
    Price:
    $66.99
    Subtotal:
  • 12 MM Flange Lock Nut W/ 1.25 Pitch

    12 MM Flange Lock Nut W/ 1.25 Pitch

    AUTOMANN USA

    $1.93
    12 MM Flange Lock Nut* High Quality Flanged Lock Nut* 1.25 Pitch* Sold Individually * Warranty On Flanged Lock Nuts Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    09-05250102
    SKU:
    09-05250102
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1.93
    Qty in Cart: 0
    Price:
    $1.93
    Subtotal:
  • Bolt Kit W/ 8 Washers And 8 Nuts For Hendrickson Rear AR 340/380 Series

    Bolt Kit W/ 8 Washers And 8 Nuts For Hendrickson Rear AR 340/380 Series

    AFTERMARKET

    $130.99
    Bolt Kit Replaces 56659-1* High Quality Bolt Kit* Set Of 8* 8 Bolts* 8 Nuts* 16 Washers* Used On Hendrickson Rear AR 340/380 Series* Sold Individually * Warranty On Bolt Kits Against Defects In...
    09-05250091
    SKU:
    09-05250091
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $130.99
    Qty in Cart: 0
    Price:
    $130.99
    Subtotal:
  • Center Bolt Sleeve Lengthener 7/16 ID X 5/8 OD X 0.196 Inch

    Center Bolt Sleeve Lengthener 7/16 ID X 5/8 OD X 0.196 Inch

    AUTOMANN USA

    $1.14
    7/16 Inch ID X 5/8 Inch OD X 0.196 Inch Leaf Spring Center Bolt Lengthener SleeveUse this bolt sleeve to lengthen your leaf spring center bolt head by an extra 0.196 inch when using tapered shims...
    09-05250092
    SKU:
    09-05250092
    Material Options:
    Brass Copper
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1.14
    Qty in Cart: 0
    Price:
    $1.14
    Subtotal:
  • Shock Spacer - 1.5 In OD, 0.81 In ID For Hendrickson Turner

    Shock Spacer - 1.5 In OD, 0.81 In ID For Hendrickson Turner

    AUTOMANN USA

    $5.67
    Shock Spacer Replaces E11831, A20913* High Quality Shock Spacer* 1 1/2 In OD * 0.810 Inch ID* 1.15625In Thickness* Sold Individually * Warranty On Shock Spacers Against Defects In Workmanship &...
    09-05250082
    SKU:
    09-05250082
    Diameter Options:
    1 1/2 Inch
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.67
    Qty in Cart: 0
    Price:
    $5.67
    Subtotal:
  • Shock Spacer - 1 1/2 In OD, 3/4 In ID For Hendrickson Turner

    Shock Spacer - 1 1/2 In OD, 3/4 In ID For Hendrickson Turner

    AUTOMANN USA

    $6.34
    0.78 Inch Tall Shock Spacer* High Quality Shock Spacer* 3/4 Inch ID* 1.5In OD * 0.78 Inch Height * Sold Individually * Warranty On Shock Spacers Against Defects In Workmanship & Material From Date Of...
    09-05250081
    SKU:
    09-05250081
    Material Options:
    Brass
    Diameter Options:
    3/4 Inch
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $6.34
    Qty in Cart: 0
    Price:
    $6.34
    Subtotal:
  • 1.5 Inch Shock Spacer, 2.25 In OD, 0.77 In ID

    1.5 Inch Shock Spacer, 2.25 In OD, 0.77 In ID

    AUTOMANN USA

    $9.25
    1.5 Inch Shock Spacer Replaces A23645Maintain perfect suspension alignment with this reliable 1.5 Inch Shock Spacer. With a 2.25-inch OD, 0.77-inch ID, and 1.5-inch height, it strengthens your shock...
    09-05250083
    SKU:
    09-05250083
    Material Options:
    Brass
    Diameter Options:
    3/4 Inch
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $9.25
    Qty in Cart: 0
    Price:
    $9.25
    Subtotal:
  • Torque Arm Bolt Kit E-5277, 49176001 For Hendrickson Rear E4 Series

    Torque Arm Bolt Kit E-5277, 49176001 For Hendrickson Rear E4 Series

    AUTOMANN USA

    $5.44
    Torque Arm Bolt Kit With Cap Screw, Lock Nut, U-Bolt Washer* High Quality Bolt Kit* Includes - Cap Screw  - Lock Nut  - U Bolt Washer* For Torque Arm* Sold Individually * Warranty On Bolt Kits...
    09-05250074
    SKU:
    09-05250074
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.44
    Qty in Cart: 0
    Price:
    $5.44
    Subtotal:
  • 1-5/16 Inch ID -12 TPI Nut For 9541 & 9547 Air Springs

    1-5/16 Inch ID -12 TPI Nut For 9541 & 9547 Air Springs

    AUTOMANN USA

    $16.52
    1 1/2 OD, 1-5/16 ID Air Spring NutStrengthen your air spring assemblies with this 1-5/16 Inch ID -12 TPI Nut, designed for 9541 and 9547 air springs. With a 1.5-inch outer diameter and 0.925-inch...
    09-05250073
    SKU:
    09-05250073
    Truck Class:
    Universal
    Material Options:
    Brass
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $16.52
    Qty in Cart: 0
    Price:
    $16.52
    Subtotal:
  • Total: items /

Adding your products to cart

Enhance your Peterbilt 388 with durable Peterbilt 377, 378, 388, and 389 frame crossmembers and stylish covers. From stainless steel and aluminum options to fiberglass and steel designs, this product lineup offers a variety of high-quality products to protect your truck's rear frame. Keep your rig looking its best with customizable covers that feature notch cutouts, light openings, and emblem mounts. Plus, find the right walking beam components to ensure a smooth, comfortable ride. Whether you're restoring a classic Peterbilt or upgrading a newer model, this collection of frame crossmembers and covers has everything you need to elevate your Peterbilt 388's appearance and functionality.

Frequently Asked Questions About Peterbilt 388 Frame Crossmembers & Covers

What are frame crossmembers and covers used for on a Peterbilt 388?

Frame crossmembers are structural components that run horizontally between the frame rails, providing rigidity and support for the chassis, while covers protect these areas from road debris, moisture, and corrosion. Together they help maintain frame integrity and give the underside of the truck a cleaner, finished appearance.

Will these crossmembers and covers fit my specific Peterbilt 388 configuration?

Fitment can vary depending on wheelbase, frame rail spacing, and whether your truck has factory or aftermarket modifications. It is important to check the listed specifications and, when possible, compare part numbers with your truck's build sheet or consult with our parts team before ordering to confirm a proper fit.

What materials are these parts made from, and how well do they hold up over time?

Most crossmembers and covers are constructed from steel or aluminum, depending on the specific part and application. Steel components typically offer strength and durability for structural crossmembers, while aluminum covers are often chosen for their corrosion resistance and lighter weight. Finish options may include raw metal, painted, or powder-coated surfaces to help resist rust and wear from daily use.

Can I install a crossmember or cover myself, or should I have a professional do it?

Covers are generally straightforward to install with basic tools and can often be handled by anyone comfortable with routine truck maintenance. Structural crossmembers, however, are load-bearing components, and improper installation can affect frame integrity and safety. For crossmember replacement or modification, we recommend having the work done by a qualified technician familiar with frame repairs.

How do I know if my current crossmember or cover needs to be replaced?

Common signs include visible rust or corrosion, cracks, bending, loose or missing mounting hardware, or a cover that no longer sits flush and allows debris underneath. If you notice any flexing or unusual noise from the frame area while driving, it is a good idea to have the crossmember inspected as soon as possible.


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