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Genuine ZF 1238304390 Sliding Sleeve Premium ZF Gearbox Parts for Manual Transmissions
- 24/7 order processing with DHL/FedEx express options.
- In-stock availability for urgent repairs.
- Free technical guidance on installation and compatibility
- P/N:1238304390
Genuine ZF 1238304390 Sliding Sleeve | Premium ZF Gearbox Parts for Manual Transmissions


Technical Specification
As a trusted ZF parts dealer, we are proud to offer the high-performance ZF 1238304390 Sliding Sleeve. This critical ZF part is engineered to provide seamless gear synchronization and shift precision in heavy-duty manual transmissions.
Manufactured to original equipment standards, this sliding sleeve ensures the longevity of your synchronizer assembly. Whether you are a repair shop or a fleet manager, choosing a professional ZF parts supplier like us guarantees that you receive authentic components that meet the rigorous demands of the Ecosplit and Transtar series gearboxes.
| Property | Details |
| Part Number | 1238304390 (1238 304 390) |
| Component Name | Sliding Sleeve (Synchromesh) |
| Brand | ZF Friedrichshafen AG |
| Material | High-Grade Alloy Steel (Case-hardened) |
| Weight | 0.68 kg |
| Surface Treatment | Precision Ground & Anti-wear Coating |
| Application | ZF Ecosplit, Ecomid, and S6 Series Gearboxes |
| Reference No. | Volvo 266456 |
Simple Install Tips
To ensure the best performance of your new ZF gearbox parts, please follow these professional installation tips:
Thorough Cleaning: Before installation, clean the gearbox shaft and the internal splines of the sliding sleeve to remove any debris or old metallic particles.
Lubrication: Apply a thin layer of ZF-recommended transmission oil or high-temperature grease to the sliding surfaces and the hub.
Precise Alignment: Align the sleeve splines carefully with the synchronizer hub. Do not use excessive force; if properly aligned, it should slide on smoothly.
Check Clearances: Once installed, verify the axial movement to ensure there is no binding throughout the full range of gear travel.
Packaging & Shipping
By Express : Suitable for sample order or <50 KG Fast:3-10 days High shipping cost Door to door service
By Air : Suitable for >50 KG Fast: 3-7 days Lower than express cost Airport to airport service
By Sea: Suitable for >300 KG Lower cost port to port service


As a leading supplier and dealer of ZF parts, we provide genuine components to maintain the integrity and efficiency of your gearbox system. Trust in our expertise and quality assurance to keep your ZF gearbox running smoothly.
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