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Mack RD Trucks

Shop for aftermarket Mack RD truck parts (1979 – 2004) to repair, replace, and refurbish your heavy-duty vocational rig. We sell replacement and aftermarket parts for popular Mack RD models, including the RD600, RD688, RD688S, RD690, and RD690S. Source collision-replacement parts, customize the exterior, or add interior cab accessories to refurbish your truck at 4 State Trucks.
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  • BESTfit Quick Super Repair Kit Replaces 14256, 166627, 198472, 994900

    BESTfit Quick Super Repair Kit Replaces 14256, 166627, 198472, 994900

    BESTFIT TRUCK PARTS

    $892.99
    Quick Super Repair Kit DriveMaster Advantage By BESTfit Replaces 14256, 166627, 198472, 994900Upgrade your cooling system maintenance with the BESTfit Quick Super Repair Kit, a direct replacement for...
    29-07060200
    SKU:
    29-07060200
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $892.99
    Qty in Cart: 0
    Price:
    $892.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt W/O Install Kit Replaces 660GSAHXV3XD

    BESTfit Power Take-Off 6 Bolt W/O Install Kit Replaces 660GSAHXV3XD

    BESTFIT TRUCK PARTS

    $2,094.99
    6 Bolt Power Take-Off W/O Install Kit By BESTfit Replaces 660GSAHXV3XDBuilt for strength and reliability, the BESTfit 6 Bolt PTO Without Install Kit replaces OEM reference 660GSAHXV3XD for Chelsea...
    29-07050122
    SKU:
    29-07050122
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,094.99
    Qty in Cart: 0
    Price:
    $2,094.99
    Subtotal:
  • BESTfit Polar Extreme Super Repair Kit Replaces 1311840103, 142561, 994902

    BESTfit Polar Extreme Super Repair Kit Replaces 1311840103, 142561, 994902

    BESTFIT TRUCK PARTS

    $947.99
    Polar Extreme Super Repair Kit DriveMaster By BESTfit Replaces 1311840103, 142561, 994902Upgrade your cooling system maintenance with the BESTfit Polar Extreme Super Repair Kit, a direct replacement...
    29-07060202
    SKU:
    29-07060202
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $947.99
    Qty in Cart: 0
    Price:
    $947.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt No Assembly Shift Replaces 489XRAHXH3XK

    BESTfit Power Take-Off 8 Bolt No Assembly Shift Replaces 489XRAHXH3XK

    BESTFIT TRUCK PARTS

    $1,120.99
    8 Bolt No Assembly Shift Power Take-Off By BESTfit Replaces 489XRAHXH3XKBuilt for strength and precision, the BESTfit 8 Bolt No Assembly Shift Power Take-Off replaces OEM reference 489XRAHXH3XK for...
    29-07050118
    SKU:
    29-07050118
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,120.99
    Qty in Cart: 0
    Price:
    $1,120.99
    Subtotal:
  • BESTfit Solenoid Valve 12 Volt

    BESTfit Solenoid Valve 12 Volt

    BESTFIT TRUCK PARTS

    $107.99
    12V Solenoid Valve By BESTfitUpgrade your cooling system with the BESTfit 12 Volt Solenoid Valve, engineered for Horton air-operated fan clutch systems requiring dependable airflow control. This...
    29-07060198
    SKU:
    29-07060198
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $107.99
    Qty in Cart: 0
    Price:
    $107.99
    Subtotal:
  • BESTfit Air Operated Fan Clutch Replaces 10900960001, 10900965001B, 20955539

    BESTfit Air Operated Fan Clutch Replaces 10900960001, 10900965001B, 20955539

    BESTFIT TRUCK PARTS

    $630.99
    Air Operated Fan Clutch By BESTfit Replaces 10900960001, 10900965001B, 20955539Upgrade your cooling system with the BESTfit Air Operated Fan Clutch, a direct replacement for OEM part numbers...
    29-07060192
    SKU:
    29-07060192
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $630.99
    Qty in Cart: 0
    Price:
    $630.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt W/ Rotatable Output Flange Replaces 271GBHVPB5RA, 271GBHVPB5RB, 271GBHVPB5XK

    BESTfit Power Take-Off 6 Bolt W/ Rotatable Output Flange Replaces 271GBHVPB5RA, 271GBHVPB5RB, 271GBHVPB5XK

    BESTFIT TRUCK PARTS

    $3,364.99
    6 Bolt W/ Rotatable Output Power Take-Off By BESTfit Replaces 271GBHVPB5RA, 271GBHVPB5RB, 271GBHVPB5XKBuilt for strength and reliability, the BESTfit 6 Bolt PTO with Rotatable Output Flange replaces...
    29-07050114
    SKU:
    29-07050114
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $3,364.99
    Qty in Cart: 0
    Price:
    $3,364.99
    Subtotal:
  • BESTfit Power Take-Off 10 Bolt 12V Electric Over Hydraulic Replaces 180274HDL, 890CAFJWB3XY

    BESTfit Power Take-Off 10 Bolt 12V Electric Over Hydraulic Replaces 180274HDL, 890CAFJWB3XY

    BESTFIT TRUCK PARTS

    $6,161.99
    10 Bolt 12V Electric Over Hydraulic Power Take-Off By BESTfit Replaces 180274HDL, 890CAFJWB3XYUpgrade your PTO system with the BESTfit 10 Bolt 12V Electric Over Hydraulic Power Take-Off, a direct...
    29-07050124
    SKU:
    29-07050124
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $6,161.99
    Qty in Cart: 0
    Price:
    $6,161.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt, 3 Assembly Arrangement Replaces 660GSAHXA3XD

    BESTfit Power Take-Off 6 Bolt, 3 Assembly Arrangement Replaces 660GSAHXA3XD

    BESTFIT TRUCK PARTS

    $2,227.99
    6 Bolt, 3 Assembly Arrangement Power Take-Off By BESTfit Replaces 660GSAHXA3XDBuilt for strength and reliability, the BESTfit 6 Bolt 3 Assembly Power Take-Off replaces OEM reference 660GSAHXA3XD for...
    29-07050121
    SKU:
    29-07050121
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,227.99
    Qty in Cart: 0
    Price:
    $2,227.99
    Subtotal:
  • BESTfit Stud Kit For 272X, E Standard, And Eaton Brazil

    BESTfit Stud Kit For 272X, E Standard, And Eaton Brazil

    BESTFIT TRUCK PARTS

    $199.99
    Turbocharger Stud Kit By BESTfit Fits 272X, E Standard, And Eaton BrazilUpgrade your PTO installation with the BESTfit Stud Kit for 272X, E Standard, and Eaton Brazil systems, engineered for Chelsea...
    29-07050110
    SKU:
    29-07050110
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $199.99
    Qty in Cart: 0
    Price:
    $199.99
    Subtotal:
  • BESTfit Power Take-Off Mounting Kit, Series 267-277-859

    BESTfit Power Take-Off Mounting Kit, Series 267-277-859

    BESTFIT TRUCK PARTS

    $116.99
    Series 267-277-859 Mounting Kit By BESTfitUpgrade your PTO installation with the BESTfit Mounting Kit for Series 267-277-859, engineered for strength, precision, and long-term reliability. This PTO...
    29-07050123
    SKU:
    29-07050123
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $116.99
    Qty in Cart: 0
    Price:
    $116.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt W/ Deep Mount Replaces 489ZLDAXV5XD

    BESTfit Power Take-Off 8 Bolt W/ Deep Mount Replaces 489ZLDAXV5XD

    BESTFIT TRUCK PARTS

    $1,343.99
    8 Bolt W/ Deep Mount Power Take-Off By BESTfit Replaces 489ZLDAXV5XDBuilt for strength and precision, the BESTfit 8 Bolt Deep Mount Power Take-Off replaces OEM reference 489ZLDAXV5XD for Chelsea 489...
    29-07050120
    SKU:
    29-07050120
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,343.99
    Qty in Cart: 0
    Price:
    $1,343.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt, 6 Assembly Arrangement Replaces 489XHAHXA6XD

    BESTfit Power Take-Off 8 Bolt, 6 Assembly Arrangement Replaces 489XHAHXA6XD

    BESTFIT TRUCK PARTS

    $1,355.99
    8 Bolt, 6 Assembly Arrangement Power Take-Off By BESTfit Replaces 489XHAHXA6XDBuilt for strength and reliability, the BESTfit 8 Bolt Air Shift Power Take-Off replaces OEM reference 489XHAHXA6XD for...
    29-07050117
    SKU:
    29-07050117
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,355.99
    Qty in Cart: 0
    Price:
    $1,355.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt Air Shift Replaces 442GFAHXA3XD, MH6GB01XA1SE

    BESTfit Power Take-Off 6 Bolt Air Shift Replaces 442GFAHXA3XD, MH6GB01XA1SE

    BESTFIT TRUCK PARTS

    $1,333.99
    6 Bolt Air Shift Power Take-Off By BESTfit Replaces 442GFAHXA3XD, MH6GB01XA1SEBuilt for strength and reliability, the BESTfit 6 Bolt Air Shift Power Take-Off replaces OEM references 442GFAHXA3XD and...
    29-07050106
    SKU:
    29-07050106
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,333.99
    Qty in Cart: 0
    Price:
    $1,333.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt Air Shift Replaces 489GUAHXA3XD

    BESTfit Power Take-Off 8 Bolt Air Shift Replaces 489GUAHXA3XD

    BESTFIT TRUCK PARTS

    $1,415.99
    8 Bolt Air Shift Power Take-Off By BESTfit Replaces 489GUAHXA3XDBuilt for strength and reliability, the BESTfit 8 Bolt Air Shift Power Take-Off replaces OEM reference 489GUAHXA3XD for Chelsea 489...
    29-07050116
    SKU:
    29-07050116
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,415.99
    Qty in Cart: 0
    Price:
    $1,415.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt W/ 1 Inch Shaft Replaces 489XSAHXV3AF

    BESTfit Power Take-Off 8 Bolt W/ 1 Inch Shaft Replaces 489XSAHXV3AF

    BESTFIT TRUCK PARTS

    $1,443.99
    8 Bolt W/1 Inch Shaft Power Take-Off By BESTfit Replaces 489XSAHXV3AFBuilt for strength and reliability, the BESTfit 8 Bolt Power Take-Off with 1 inch shaft replaces OEM reference 489XSAHXV3AF for...
    29-07050119
    SKU:
    29-07050119
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,443.99
    Qty in Cart: 0
    Price:
    $1,443.99
    Subtotal:
  • BESTfit Power Take-Off W/ 7/8 Inch Shaft, Rotatable Output Flange Replaces 271MAAJPB5RB, 272MAAJPB3RB

    BESTfit Power Take-Off W/ 7/8 Inch Shaft, Rotatable Output Flange Replaces 271MAAJPB5RB, 272MAAJPB3RB

    BESTFIT TRUCK PARTS

    $3,350.99
    Power Take-Off W/ 7/8 Inch Shaft, Rotatable Output Flange By BESTfit Replaces 271MAAJPB5RB, 272MAAJPB3RBBuilt for strength and precision, the BESTfit 7/8 inch Shaft Power Take-Off with rotatable SAE...
    29-07050113
    SKU:
    29-07050113
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $3,350.99
    Qty in Cart: 0
    Price:
    $3,350.99
    Subtotal:
  • BESTfit Power Take-Off 8 Bolt W/O Install Kit Replaces 680XFAHXV3XD

    BESTfit Power Take-Off 8 Bolt W/O Install Kit Replaces 680XFAHXV3XD

    BESTFIT TRUCK PARTS

    $2,040.99
    8 Bolt Power Take-Off W/O Install Kit By BESTfit Replaces 680XFAHXV3XDBuilt for strength and dependable operation, the BESTfit 8 Bolt PTO Without Install Kit replaces OEM reference 680XFAHXV3XD for...
    29-07050102
    SKU:
    29-07050102
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,040.99
    Qty in Cart: 0
    Price:
    $2,040.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt W/O Shaft Brake Replaces 270GAHVPB3XD, 272GAHVPB3XD

    BESTfit Power Take-Off 6 Bolt W/O Shaft Brake Replaces 270GAHVPB3XD, 272GAHVPB3XD

    BESTFIT TRUCK PARTS

    $3,058.99
    6 Bolt W/O Shaft Brake Power Take-Off By BESTfit Replaces 270GAHVPB3XD, 272GAHVPB3XDBuilt for strength and reliability, the BESTfit 6 Bolt PTO Without Shaft Brake replaces OEM references 270GAHVPB3XD...
    29-07050112
    SKU:
    29-07050112
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $3,058.99
    Qty in Cart: 0
    Price:
    $3,058.99
    Subtotal:
  • BESTfit Power Take-Off 6 Bolt 3 Assembly Arrangement Replaces 236XKAHXA3XD, 230XQAJXA3XD, 272XMAJXA3XD

    BESTfit Power Take-Off 6 Bolt 3 Assembly Arrangement Replaces 236XKAHXA3XD, 230XQAJXA3XD, 272XMAJXA3XD

    BESTFIT TRUCK PARTS

    $2,956.99
    6 Bolt 3 Assembly Arrangement Power Take-Off By BESTfit Replaces 236XKAHXA3XD, 230XQAJXA3XD, 272XMAJXA3XDBuilt for strength and precision, the BESTfit 6 Bolt 3 Assembly Power Take-Off replaces OEM...
    29-07050115
    SKU:
    29-07050115
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,956.99
    Qty in Cart: 0
    Price:
    $2,956.99
    Subtotal:
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Adding your products to cart

Shop Aftermarket Mack RD Truck Parts

Working, old-school big rigs like the Mack RD series endure many years of wear and tear on jobs sites. Over time, Mack RD hardware and components experience high heat and pressure, turning mild components replacements into system-wide repairs. We stock the model-specific mechanical parts to keep your hard-working truck performing day after day:

Cosmetic Aftermarket Upgrades for Mack RD Trucks

Road debris can chip away at the headlights, fenders, mirrors, and even mud flaps over time. That’s why we stock hundreds of exterior Mack RD replacement parts to replace damaged parts. Lastly, you can find decorative custom upgrades to spruce-up the look of your rig, from interior custom dashboards to stainless steel step boxes for easy cab exit and entry.

Frequently Asked Questions About Mack RD Truck Parts

What years and models of Mack RD trucks do your parts fit?

Our Mack RD parts are designed to fit RD600, RD688, and RD690 models manufactured from 1979 through 2004. However, compatibility can vary based on specific configurations and factory options. We recommend checking your OEM or contacting our team with your truck's model year and any special equipment codes to ensure proper fitment before ordering.

Are your Mack RD bumpers made from chrome-plated steel or stainless steel?

We offer both options depending on your needs and budget. Our chrome-plated steel bumpers feature a triple-chrome plating process over heavy-gauge steel for durability and shine. Our stainless steel options are typically 304-grade stainless with a mirror polish finish. Chrome bumpers are more affordable but require regular maintenance, while stainless steel resists corrosion better in harsh conditions but comes at a higher price point.

Do I need special tools or professional installation for Mack RD bumpers?

Most Mack RD bumper installations can be completed with standard shop tools including socket sets, wrenches, and a drill for any additional mounting holes. The bumpers typically weigh between 80-150 pounds, so having a helper or hoist is strongly recommended. Installation usually takes 2-4 hours. Some aftermarket bumpers may require minor modifications to mounting brackets or drilling new holes. Professional installation is recommended if you're not comfortable with heavy lifting or drilling.

What's the difference between OEM-style and aftermarket Mack RD parts?

OEM-style parts are manufactured to match original factory specifications for direct bolt-on replacement. Aftermarket parts may offer enhanced features like additional gauge holes, different styling, or heavier construction but might require modifications during installation. OEM-style parts typically maintain factory warranty compliance, while aftermarket options often provide better value and customization options. Both meet DOT standards when applicable.

How do I maintain chrome parts on my Mack RD to prevent rust and pitting?

Chrome parts require regular maintenance to maintain their appearance, especially in regions using road salt. Wash chrome surfaces weekly with mild soap and water, then dry thoroughly. Apply a quality chrome polish monthly and use a chrome sealant every 3-4 months for added protection. Avoid abrasive cleaners or steel wool which can scratch the chrome. For winter storage or harsh conditions, consider applying a thin coat of WD-40 or similar protectant, then remove before regular use.


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