null

Mack RD Truck Drive Axle Springs & Hangers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Poly Insulator 25115012 For Mack

    Poly Insulator 25115012 For Mack

    AFTERMARKET

    $81.99
    Mack Truck Replacement Insulator* High Quality Insulator* Poly * Dimensions:  - 1.75 Inch Button Size  - 6.00 Inch Length  - 4.50 Inch Width  - 3.00 Inch Height* Made In USA* Sold Individually*...
    11-05100051
    SKU:
    11-05100051
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Height Options:
    3 Inch
    Width Options:
    4 1/2 Inch
    Length Options:
    6 Inch
    Material Options:
    Plastic/Poly
    $81.99
    Qty in Cart: 0
    Price:
    $81.99
    Subtotal:
  • Unitized Spindle Nut 4.125 X 2-7/8 Inch-12 Thread For Mack Drive Axle 34K, 38K, 44K

    Unitized Spindle Nut 4.125 X 2-7/8 Inch-12 Thread For Mack Drive Axle 34K, 38K, 44K

    AFTERMARKET

    $67.99
    Replacement Unitized Drive Axle Spindle Nut* High Quality Unitized Spindle Nut* Dimensions:  - Threads- 2-7/8 Inch-12  - A/F- 4.125 Inch  - Thickness- 0.989 Inch* Made In USA* Sold Individually*...
    11-20200000
    SKU:
    11-20200000
    Product Type:
    Wheels
    Truck Class:
    Heavy Duty
    Make:
    Mack
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
    Subtotal:
  • Poly Upper Insulator Load Pad 10QK1065A, 25121508, R307481 For Mack SS34-38 Series

    Poly Upper Insulator Load Pad 10QK1065A, 25121508, R307481 For Mack SS34-38 Series

    AFTERMARKET

    $86.99
    Replacement Mack Insulator Pad-Upper* High Quality Insulator* Poly* Dimensions:  - 6.00 Inch Length  - 4.50 Inch Width  - 2.375 Inch Height  - 1.75 Inch Button Size* Upper* Made In USA* Sold...
    11-05100055
    SKU:
    11-05100055
    Product Type:
    Frame & Chassis
    Material Options:
    Plastic/Poly
    Height Options:
    2 Inch
    Position:
    Upper
    Width Options:
    4 1/2 Inch
    Length Options:
    6 Inch
    Make:
    Mack
    $86.99
    Qty in Cart: 0
    Price:
    $86.99
    Subtotal:
  • Premium Lower Insulator Load Pad 10QK36B, 10QK36C, 21036254

    Premium Lower Insulator Load Pad 10QK36B, 10QK36C, 21036254

    AFTERMARKET

    $47.22
    Lower Load Pad Replacement* High Quality Insulator* Dimensions:  - Length- 6.00 Inch  - Height- 3.75 Inch  - Button Size- 1.75 Inch* Lower* Made In USA* Sold Individually* Warranty On Insulators...
    11-05100038
    SKU:
    11-05100038
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Height Options:
    3 1/2 Inch
    Length Options:
    6 Inch
    Position:
    Lower
    $47.22
    Qty in Cart: 0
    Price:
    $47.22
    Subtotal:
  • Trunnion Stand Bracket 7QL5100, 97QL5122 For Mack

    Trunnion Stand Bracket 7QL5100, 97QL5122 For Mack

    AFTERMARKET

    $3,012.99
    Trunnion Stand ReplacementThis trunnion stand works on your Mack Camelback rear suspension, whether you've got the SS34-38 with split trunnions running at 34K or 38K, or the heavier SS44/SWS573 setup...
    11-05100024
    SKU:
    11-05100024
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    $3,012.99
    Qty in Cart: 0
    Price:
    $3,012.99
    Subtotal:
  • Poly Lower Insulator Load Pad 10QK388, R307480, 25125064 For Mack SS34- 38-44 Series

    Poly Lower Insulator Load Pad 10QK388, R307480, 25125064 For Mack SS34- 38-44 Series

    AFTERMARKET

    $126.99
    Mack Lower Load Pad* High Quality Insulator* Poly* Dimensions:  - 6.00 Inch Length  - 3.75 Inch Height* Made In USA* Sold Individually* Warranty On Insulators Against Defects In Workmanship &...
    11-05100045
    SKU:
    11-05100045
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Height Options:
    3 1/2 Inch
    Length Options:
    6 Inch
    Material Options:
    Plastic/Poly
    $126.99
    Qty in Cart: 0
    Price:
    $126.99
    Subtotal:
  • Insulator Box 52QK418BP5 For Mack

    Insulator Box 52QK418BP5 For Mack

    AFTERMARKET

    $209.99
    6.375 Inch Deep Insulator Box For 4 Inch Spring* High Quality Insulator Box* Dimensions:  - 6.375 Inch Depth  - 7.625 Inch C To C* 4 Inch Spring* Made In USA* Sold Individually* Warranty On Insulator...
    11-05100016
    SKU:
    11-05100016
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Width Options:
    4 Inch
    $209.99
    Qty in Cart: 0
    Price:
    $209.99
    Subtotal:
  • Poly Lower Insulator Load Pad 10QK389, 25114877 For Mack

    Poly Lower Insulator Load Pad 10QK389, 25114877 For Mack

    AFTERMARKET

    $174.99
    Replacement Mack Lower Load Pad* High Quality Insulator* Poly* Dimensions:  - 7.00 Inch Length  - 4.375 Inch Height  - 2.00 Inch Button Size* Lower* Made In USA* Sold Individually* Warranty On...
    11-05100041
    SKU:
    11-05100041
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Material Options:
    Plastic/Poly
    Height Options:
    4 Inch
    Position:
    Lower
    Length Options:
    7 Inch
    $174.99
    Qty in Cart: 0
    Price:
    $174.99
    Subtotal:
  • Steal Trunnion Cap 2.5 Inch Deep 25164367, 97QL3101 For Mack

    Steal Trunnion Cap 2.5 Inch Deep 25164367, 97QL3101 For Mack

    AFTERMARKET

    $48.22
    Replacement Mack Trunnion CapThis Mack trunnion cap is made of steel and measures 2.5 inches deep, featuring 6 mounting holes to secure it in place.* High Quality Trunnion Cap* Steel* Dimensions:  -...
    11-05100026
    SKU:
    11-05100026
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Material Options:
    Steel
    Diameter Options:
    7 Inch
    Height Options:
    2 1/2 Inch
    $48.22
    Qty in Cart: 0
    Price:
    $48.22
    Subtotal:
  • Lower Insulator Load Pad 10QK343P13. 10QK36. 10QK36A. 10QK36AP1. 10QK36AP2 For Mack

    Lower Insulator Load Pad 10QK343P13. 10QK36. 10QK36A. 10QK36AP1. 10QK36AP2 For Mack

    AFTERMARKET

    $48.29
    Lower Load Pad ReplacementEnhance your Mack suspension system with this Mack Lower Load Pad, made for SS 34-44 Series, SW/ST34 Series applications. This durable aftermarket replacement offers optimal...
    11-05100037
    SKU:
    11-05100037
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Height Options:
    3 1/2 Inch
    Length Options:
    6 Inch
    Position:
    Lower
    $48.29
    Qty in Cart: 0
    Price:
    $48.29
    Subtotal:
  • Trunnion 25130252. 39QK24 For Mack 4 Inch Shaft & 5 Inch Spring

    Trunnion 25130252. 39QK24 For Mack 4 Inch Shaft & 5 Inch Spring

    AFTERMARKET

    $436.99
    Replacement TrunnionThis replacement trunnion fits Mack SS58 (55K) Camelback rear suspensions.* High Quality Trunnion* Dimensions:  - 4 Inch Shaft  - 5 Inch Wide Spring  - 9 Inch C To C* Made In USA*...
    11-05100022
    SKU:
    11-05100022
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    $436.99
    Qty in Cart: 0
    Price:
    $436.99
    Subtotal:
  • Trunnion Stand Bracket 25129644. 97QL590M For Mack 32-1/4 Inch Wide Standard Frames

    Trunnion Stand Bracket 25129644. 97QL590M For Mack 32-1/4 Inch Wide Standard Frames

    AFTERMARKET

    $8,406.99
    Mack Heavy Duty Replacement Trunnion StandReplace your worn Mack SS50 Camelback trunnion stand with this heavy-duty unit built for 46,000 lb suspensions. Designed for 4 inch bars and springs, this...
    11-05100023
    SKU:
    11-05100023
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    $8,406.99
    Qty in Cart: 0
    Price:
    $8,406.99
    Subtotal:
  • Trunnion Stand Bracket 25122949, 25133830 For Mack

    Trunnion Stand Bracket 25122949, 25133830 For Mack

    AFTERMARKET

    $3,041.99
    Trunnion Stand Replacement* High Quality Trunnion Stand* 3 1/2 Inch Bar Diameter* Square Bolt Pattern* (2) Collars* Note- This Kit Has 1.0 Inch Frame Holes If OEM Is 7/8 Inch Chassis* Reaming May Be...
    11-05100025
    SKU:
    11-05100025
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Diameter Options:
    3 1/2 Inch
    $3,041.99
    Qty in Cart: 0
    Price:
    $3,041.99
    Subtotal:
  • Spring Eye Shackle Kit 25624728, 10QK240M For Mack

    Spring Eye Shackle Kit 25624728, 10QK240M For Mack

    AFTERMARKET

    $287.99
    Replacement Mack Shackle Kit* High Quality Shackle Kit* Consists Of:   - (2) Side Bar  - (2) Silent Block  - (4) Cap Screw   - (4) Lock Nut* Made In USA* Sold Individually* Warranty On Shackle Kits...
    11-05090014
    SKU:
    11-05090014
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    $287.99
    Qty in Cart: 0
    Price:
    $287.99
    Subtotal:
  • Insulator Box 52QK434P3 For Mack

    Insulator Box 52QK434P3 For Mack

    AFTERMARKET

    $348.99
    7.5 Inch Deep Insulator Box For 5 Inch Spring* High Quality Insulator Box* Dimensions:  - 5.0 Inch Spring  - 7 1/2 Inch Depth  - 8.687 Inch C To C* Made In USA* Sold Individually* Warranty On...
    11-05100017
    SKU:
    11-05100017
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    $348.99
    Qty in Cart: 0
    Price:
    $348.99
    Subtotal:
  • Adjusting Nut Kit Replaces 3341398, G16787 For Mack Rear

    Adjusting Nut Kit Replaces 3341398, G16787 For Mack Rear

    AUTOMANN USA

    $23.12
    Mack Rear Adjusting Nut Kit* High Quality Adjusting Nut Kit * Sold Individually* Warranty On Adjusting Nut Kits Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    11-05100061
    SKU:
    11-05100061
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Width Options:
    4 Inch
    Material Options:
    Steel
    $23.12
    Qty in Cart: 0
    Price:
    $23.12
    Subtotal:
  • Trunnion Replaces 25130253. 39QK325. 39QK54

    Trunnion Replaces 25130253. 39QK325. 39QK54

    AFTERMARKET

    $385.99
    Trunnion 4 Inch Shaft, 4 Inch Spring* High Quality Trunnion* 4 Inch X 4 Inch* Made In USA* Sold Individually* Warranty On Trunnions Against Defects In Workmanship & Material From Date Of Purchase***...
    11-05100011
    SKU:
    11-05100011
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Diameter Options:
    4 Inch
    Material Options:
    Steel
    Width Options:
    4 Inch
    Position:
    Rear
    $385.99
    Qty in Cart: 0
    Price:
    $385.99
    Subtotal:
  • Lower Trunnion 8.9 Inch Replaces 39QK431, R303685, CS71602B For Mack

    Lower Trunnion 8.9 Inch Replaces 39QK431, R303685, CS71602B For Mack

    AFTERMARKET

    $121.99
    Mack Lower Half Trunnion For SS34-38-ST Series Rear Suspensions* High Quality Trunnion* Dimensions:  - 1.35 Inch U-Bolt Holes  - 8.975 Inch Overall Length  - 5.40 Inch Length C To C * Uses 4 Inch...
    11-05100013
    SKU:
    11-05100013
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Mack
    Material Options:
    Steel
    Position:
    Rear
    Length Options:
    8 3/4 Inch
    Width Options:
    4 Inch
    $121.99
    Qty in Cart: 0
    Price:
    $121.99
    Subtotal:
  • Trunnion Upper 39QK433A For Mack Rear

    Trunnion Upper 39QK433A For Mack Rear

    AFTERMARKET

    $162.99
    Upper Half Trunnion For Mack Rear SS34-38 Camelback With Split Trunnions* High Quality Trunnion* U bolt Holes- 1.250 Inch* Note- 4 Inch Wide Springs* Made In USA* Sold Individually* Warranty On...
    11-05100009
    SKU:
    11-05100009
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Width Options:
    4 Inch
    Material Options:
    Steel
    Position:
    Rear
    $162.99
    Qty in Cart: 0
    Price:
    $162.99
    Subtotal:
  • Trunnion Assembly Replaces E-5077, M1118, 39QK226, 39QK226A For Mack

    Trunnion Assembly Replaces E-5077, M1118, 39QK226, 39QK226A For Mack

    AFTERMARKET

    $792.99
    Mack Trunnion with Bushing* High Quality Trunnion* With Bushing * Made In USA* Sold Individually* Warranty On Trunnions Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    11-05100012
    SKU:
    11-05100012
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Material Options:
    Steel
    Position:
    Rear
    Width Options:
    4 Inch
    $792.99
    Qty in Cart: 0
    Price:
    $792.99
    Subtotal:
  • Total: items /

Adding your products to cart

Shop for Aftermarket Drive Axle Springs & Hangers for the Mack RD Truck Model. Keep your Mack RD running smoothly with top-notch suspension parts from this product lineup. Whether it s leaf springs, hangers, bushings, or alignment shims, we've got what you need to keep your truck safe and road-ready. Highlights include heavy-duty leaf springs with high weight capacities, durable bushings, and direct OEM replacements for a perfect fit. you'll also find all the hardware bolts, nuts, and washers to complete your suspension repairs or upgrades with ease. Whether it s a single part or a full overhaul, this product lineup has everything to keep your Mack RD in peak condition.

Frequently Asked Questions About Mack RD Truck Drive Axle Springs & Hangers

What do drive axle springs and hangers do on my Mack RD truck?

Drive axle springs support the weight of the truck and its load while absorbing road shock, helping maintain ride stability and proper axle alignment. Spring hangers anchor the springs to the frame, holding them securely in place and allowing them to flex and pivot as the suspension moves. Together, these components keep your drive axle suspension performing safely under heavy loads.

How do I know if my springs or hangers need to be replaced?

Common signs include sagging or uneven ride height, cracked or broken spring leaves, excessive frame vibration, unusual noises over bumps, or visible rust and metal fatigue around the hanger brackets. If you notice the truck leaning to one side or handling differently when loaded, it is a good idea to inspect the springs and hangers for wear or damage.

Will these springs and hangers fit my specific Mack RD model?

Mack RD trucks were built over many years with different axle configurations and suspension setups, so fitment can vary by model year and specification. Always check the part number against your truck's suspension system or provide your VIN when ordering to confirm compatibility before purchasing.

Are these parts made from OEM-grade materials?

Our drive axle springs and hangers are built to hold up under the demands of heavy-duty use, using durable steel construction designed to match the strength and specifications of factory components. This helps ensure a proper fit and reliable performance once installed.

Can I install these parts myself, or should I have a professional do it?

Replacing drive axle springs and hangers involves working with heavy components under load and often requires lifting the truck, supporting the axle, and properly torquing fasteners to spec. Because incorrect installation can affect handling and safety, this job is best handled by an experienced diesel technician or someone with the proper tools and lift equipment.


Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!