Brake shoes and drums wear together, but they are not matched by brand name alone. A part number or FMSI number can narrow the search, while the brake size, shoe family, lining specification, drum pilot, bolt pattern, offset, and axle application determine whether the replacement is suitable.
Common brake shoe cross-references
The following numbers are currently associated with GBK brake shoe products. Use them as replacement-search references, then confirm the complete brake specification before ordering.
| Common Reference Numbers | Brake Shoe Family | GBK Option | GBK Catalog Specification |
|---|---|---|---|
| 1308 / 1308Q / 1308TT Meritor A3222F1982 / KSMA2121308Q Haldex GR1308QN Automann 148.1308Q.23 |
Meritor Q front | B-1308Q | 15" x 4", 23,000-lb rating, 20 rivets |
| 4515Q / 4515E Meritor A3222F2467 / KSMA2104515Q Haldex GR4515QN Automann 148.4515Q.23 |
Meritor Q rear | B-4515Q23K | 16.5" x 7", 23,000-lb rating, 32 rivets |
| 4702Q / 4702QP Meritor SMA2104702QP / A3222M2223 Haldex GR4702QN Automann 148.4702Q.23 |
Meritor Q Plus front | B-4702Q23K | 15" x 4", 23,000-lb rating, 16 rivets |
| 4707Q / 4707QP Meritor A3222F2466 / KSMA2124707QP Haldex GR4707QPN Automann 148.4707Q.23 |
Meritor Q Plus | B-4707Q23K | 16.5" x 7", 23,000-lb rating, 32 rivets |
| 4709 / 4709ES / 4709ES2 Meritor R4709G2 / XK2124709ES2 Haldex GR4709ES2R Automann 148.4709E.23 |
Eaton ES II | B-4709ESII23K | 16.5" x 7", 23,000-lb rating, 32 rivets |
| 4719 / 4719ES / 4719ES2 Meritor R700024 Haldex GR4719ES2R Automann 148.4719E.23 |
Eaton ES | B-4719-23K | 16.5" x 5", 23,000-lb rating, 20 rivets |
| 4720 Meritor R700025 Automann 148.4720Q.23 |
Meritor Q Plus | B-4720-23K | 16.5" x 5", 23,000-lb rating, 16 rivets |
Common brake drum cross-references
| Common Reference Numbers | GBK Option | GBK Catalog Specification | What to Verify |
|---|---|---|---|
| 3922X / 56864B Automann 151.6726BA |
GD3000 | 16.5" x 7", 10-hole, approximately 102 lbs | Pilot, bolt circle, offset, mounting type, and axle application |
| 3807X / 66809 Automann 151.68607 |
GD3052 | 16.5" x 8.6", 10-hole, approximately 118 lbs | Brake width, pilot, bolt circle, offset, and clearance |
| 2983C / 67518F Automann 151.6704 |
GD3027 | 16.5" x 7", 10-hole, approximately 105 lbs | Pilot, bolt pattern, offset, flange, and application |
| Webb 96864B Meritor Steellite 53-123537-002 |
GDSSD1657 | 16.5" x 7", 10-hole steel-shell drum, approximately 89 lbs | Material class, pilot, bolt circle, offset, GAWR, and approved application |
| 3600AX / 66864B Automann 151.6700BA |
BD3001 | 16.5" x 7", 10-hole, approximately 108 lbs | Pilot, bolt circle, offset, mounting, and compatible hub |
| 3295A / 68981B Automann 151.6722 |
BD3034 | 16.5" x 7", 10-hole, approximately 107 lbs | Do not substitute 3295B without confirming all dimensions |
| 3771AX / 65546B Meritor 122921 |
M328N923 | 15" x 4", 10-hole, approximately 80 lbs | Brake size, pilot, bolt circle, offset, and wheel-end application |
An FMSI number is a starting point, not the complete specification
The base FMSI family helps identify shoe geometry, but products within or around the same family can differ by brake system, lining rating, axle position, rivet pattern, hardware, and intended application. Match the full product description rather than relying on the three- or four-digit family number alone.
What to inspect before replacing brake shoes
- Brake system: Meritor Q, Q Plus, Eaton ES, ES II, or another design
- Brake size: drum diameter and shoe width
- Axle position: front, rear, drive, or trailer application
- Rating: lining and axle-rating requirements
- Hardware: rollers, springs, pins, anchors, and included repair kit
- Condition: lining wear, cracks, contamination, glazing, and uneven wear
What to verify before ordering a brake drum
- Nominal brake diameter and shoe width
- Inboard or outboard mounting design
- Pilot diameter
- Bolt-hole count, hole diameter, and bolt circle
- Overall depth, offset, and flange dimensions
- Drum material and weight class
- Axle, hub, and GAWR application
- Maximum service diameter stamped on the original or specified by the manufacturer
Replace a drum when it is cracked, damaged, contaminated beyond service, or outside the applicable manufacturer service limits. Do not machine or reuse a drum beyond its marked limits.
Browse GBK brake shoes, brake drums, and brake repair kits.
Send GBK the FMSI number, drum number, axle information, and measurements when the brake family or dimensions cannot be confirmed.
Cross-reference numbers identify possible replacement options. Buyers and installers must verify brake size, system family, lining or drum specification, hardware, axle application, and all critical dimensions before installation.
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