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GT-30/30L GBK Brake Chamber 3030 Long Stroke with clevis, gold, sealed bottom, 3″ stroke, long PUSH ROD 13″
GBK GT-30/30L gold-finish Type 30/30 combination spring brake chamber, 3″ long stroke, extended 13″ fully threaded push rod (5/8″-18 UNF), non-welded detachable clevis kit and mounting hardware, sealed tamper-resistant housing with caging T-bolt, square air ports (long-stroke casting). For drive and trailer axles on Class 6-8 semi trucks.
In Stock: 110
Wholesale over $1,500 to NJ & NY
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- Defective-on-arrival parts replaced free — return policy
- Cross-reference checked against OEM & aftermarket part numbers
The GBK GT-30/30L is a gold-finish Type 30/30 combination spring brake chamber built for long-stroke applications on Class 6-8 commercial trucks and heavy-duty trailers. It pairs a 3" long-stroke service diaphragm with a high-tension parking/emergency spring brake, and ships with an extended 13" fully threaded push rod (5/8"-18 UNF) plus a non-welded detachable clevis kit for on-site cut-to-length fitment. Square air ports identify the long-stroke casting; the factory-sealed, tamper-resistant housing locks down the power spring and includes a mechanical caging bolt (T-Bolt) for safe servicing. FMVSS-121 compliant.
- Type 30/30 Long-Stroke Combination: Double-diaphragm piggyback — Type 30 service brake plus Type 30 spring brake; 3" long stroke for extended-travel S-cam drum systems.
- Square Air Ports: Long-stroke casting with square air-port bosses (3/8" NPT) — visually distinct from the round-port regular-stroke GT-30/30.
- 13" Extended Threaded Push Rod: Extra-long 13" fully threaded push rod (5/8"-18 UNF) for deep-set axles; non-welded detachable clevis allows on-site cut-to-length customization; includes caging T-bolt.
- Sealed & FMVSS-121 Compliant: Factory tamper-resistant sealed housing; gold powder-coated corrosion-resistant finish; double-diaphragm unit fully complies with FMVSS-121.
- Universal Fit: Direct replacement for Class 6-8 semi trucks and trailers; 5/8"-11 UNC mounting studs, 4.75" bolt center spacing.
Technical Specifications: Type: T30/30 Combination Long Stroke | Service Stroke: 3.0" Long | Push Rod: 13" Threaded 5/8"-18 UNF | Clevis: Non-Welded Detachable | Mounting Studs: 5/8"-11 UNC, 4.75" bolt spacing | Air Port: Square, 3/8" NPT × 2 | Finish: Gold Powder-Coated | Includes: Clevis, Caging T-Bolt, Cotter Pin, Mounting Nuts
Packaging: Sold per piece. 50 pcs/pallet.
Product Specifications
| Material | Gold Powder-Coated Steel |
|---|---|
| Chamber Type | Type 30/30 Combination (Long Stroke) |
| Stroke | 3.0" Long |
| Push Rod Length | 13" |
| Push Rod Thread | 5/8"-18 UNF |
| Clevis | Detachable Threaded Clevis (Non-Welded) |
| Stud Thread | 5/8"-11 UNC |
| Bolt Spacing | 4.75" |
| Air Port | 3/8" NPT, Square |
| Mounting Holes | 2 |
| Net Weight | 39 lbs |
| Gross Weight | 35.27 lbs |
Cross-reference by brand
| Brand | Part Number |
|---|---|
| Bendix | NT3030ELS-WC |
| Haldex | GC3030L |
| Automann | 179.SB3030SL |
| MGM | 3230951 |
| World American | WA3030TL |
| Aftermarket Ref. | T30/30DD-L, GBCT3030LS |
Packaging & Delivery
Every GBK Parts order is packed with care. Pallet orders are tightly shrink-wrapped and strapped for safe freight transit. Select products also come in individual branded GBK USA retail boxes — ready for resale or direct customer delivery.
About GBK Parts
GBK Parts is a U.S.-based wholesale and retail distributor of heavy-duty commercial truck parts, headquartered in New Jersey. We specialize in brake components, axle parts, and drivetrain hardware for Class 6–8 trucks, trailers, and commercial vehicles.
We source directly from certified OEM-grade manufacturers and maintain a large inventory in our New Jersey warehouse, enabling fast fulfillment for both retail and wholesale customers across the United States.
Why Choose GBK Parts?
- Direct Wholesale Pricing — Competitive pricing with volume discounts for approved B2B accounts.
- OEM-Grade Quality — All parts meet or exceed OEM specifications. Brake components are FMSI-coded and tested to FMVSS standards.
- Fast Shipping — Same-day or next-day shipping on in-stock items. Free standard shipping on retail orders over $100, nationwide.
- Catalog-Based Production — Extensive product catalog covering a wide range of heavy-duty truck and trailer parts, available to order.
- NET 15 Terms — Approved wholesale accounts are eligible for NET 15 payment terms.
1 review for GT-30/30L GBK Brake Chamber 3030 Long Stroke with clevis, gold, sealed bottom, 3″ stroke, long PUSH ROD 13″
Only logged in customers who have purchased this product may leave a review.
Ray Bennett (verified owner) –
Installed this 30/30 long-stroke chamber on a Volvo VNL about two weeks ago, and it’s been working flawlessly. We mostly do highway hauls with occasional heavy loads, and it holds pressure perfectly. I’d definitely buy it again for fleet maintenance.