ACDelco
ACDelco 18B555 | Rear Brake Drum
ACDelco Professional Brake Drums are constructed with G3000 SAE qualified material for structural integrity and maximum service life. They are tested to ISO/TS 16949 quality system standards and...
ABS Tone Ring Included | No |
ACD_RemanDes | No |
AltPA_127_mm | 280.9 |
AltPA_141_mm | 280.92 |
AltPA_143_mm | 139.7 |
AltPA_2061 | 0.456 |
AltPA_2061_mm | 11.582 |
AltPA_25_mm | 314.3 |
AltPA_3070_mm | 90.6 |
AltPA_8372_mm | 279.4 |
Bolt Hole Quantity | 6 |
Brake Surface Finish | Turned |
Discard Thickness | 11.06 |
FAQ - A1 | No, but it is a good idea to inspect them for wear-out, cracking, leaking etc. |
FAQ - A2 | Yes, ACDelco also offers GM OE and Advantage brake drums. |
FAQ - A3 | No, but it is a good idea to inspect them at every tire rotation. |
FAQ - Q1 | Do I have to replace all my brake parts when replacing my brake drums? |
FAQ - Q2 | Does ACDelco offer other grades of brake drums? |
FAQ - Q3 | Do I have to replace my brake drums after a certain amount of time? |
Features & Benefits - B1 | Inspected for balance; resulting in smooth brake operation and noise reduction |
Features & Benefits - B2 | Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products |
Features & Benefits - B3 | Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration |
Good Maintenance Practices - S1 B1 | Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations. |
Good Maintenance Practices - S1 B2 | Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required. |
Good Maintenance Practices - S1 B3 | Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary). |
Good Maintenance Practices - S1 B4 | Check the thickness of your brake pads. |
Good Maintenance Practices - S1 H | The following inspections and maintenance procedures can help prevent potential brake problems: |
Good Maintenance Practices - S2 B1 | Inspection of the brake hoses for brittleness or cracking. |
Good Maintenance Practices - S2 B2 | Inspection of brake lining and pads for wear or contamination by brake fluid or grease. |
Good Maintenance Practices - S2 B3 | Inspection of wheel bearings and grease seals. |
Good Maintenance Practices - S2 B4 | Parking brake adjustments (as needed). |
Good Maintenance Practices - S2 H | The following should be conducted by a qualified technician: |
Grade Type | REGULAR |
Height | 4.25 |
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Length | 11.06 |
Marketing Statement - Product Line | Brakes are one area in which vehicle owners simply cannot compromise. With ACDelco Brakes, they can get the peace of mind that comes with parts that are expertly engineered, manufactured to stringent tolerances, thoroughly tested and backed by the ACDelco name. Choose from our GM Original Equipment, Professional, Advantage, and Specialty Series brake products to meet your performance needs and budget. For your GM and non-GM vehicles, trust ACDelco rotors, pads, drums, and other brake components to help keep you and your loved ones safe. |
Marketing Statement - Sub Brand | ACDelco Professional, premium aftermarket, Brake products mean no compromises and quality at a fair price. ACDelco also offers select Specialty Brake products for Fleet and Police applications as well. Whether you call on our brake pads, brake shoes, rotors or drums, you can rest assured that ACDelco will give you the stopping power you need. And, with our warranty coverage, you will have the confidence and peace of mind that comes with owning ACDelco products. |
Material | Cast Iron |
Measurements | 11 in X 2 in |
Mkt_State_Warranty_CA | 24 Months/40,000 KM (Parts Only). Please see ACDelcocanada.com for more details. |
Mkt_State_Warranty_US | 24 Month / Unlimited Mile Limited Warranty (Parts Only). Please see ACDelco.com for more details. |
Nominal Drum Diameter | 11 |
Outer Cooling Fins | NO |
Outside Diameter | 12.37 |
Product Description | ACDelco Professional Brake Drums are constructed with G3000 SAE qualified material for structural integrity and maximum service life. They are tested to ISO/TS 16949 quality system standards and validated for balance to provide better braking performance. Chamfer angle, vane configuration, and plate thickness all follow the OE design, making them a premium aftermarket replacement for your GM and non-GM vehicle. Also, no machining is required. ACDelco Professional Brake Drums are ready to be installed right out of the box. |
Programming Required | NO |
Signs of Wear & Troubleshooting - S1 B1 | Reduced braking force. |
Signs of Wear & Troubleshooting - S1 B2 | Low brake pedal height. |
Signs of Wear & Troubleshooting - S1 B3 | Increased stopping distances. |
Signs of Wear & Troubleshooting - S1 B4 | Squealing or scraping noises. |
Signs of Wear & Troubleshooting - S1 B5 | Brake pedal pulsation (not to be confused with normal ABS operation). |
Signs of Wear & Troubleshooting - S1 H | Brake drum signs of wear include: |
Vintage_Part_Indicator | N |
Weight | 13 |
Width | 13 |