ZF16S2530 First Gear Seat 1297 304 527
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ZF16S2530 First Gear Seat 1297 304 527

1297 304 527 is the main box 1st/2nd gear synchronizer tooth seat (gear hub) for ZF Ecosplit 16S2530 16-speed heavy-duty manual transmission. It is the core splined base of the 1st/2nd gear synchronizer assembly, guiding the synchronizer sleeve to slide and complete speed synchronization for low gear shifts, ensuring stable power transmission in low-speed climbing conditions. It resolves faults such as internal spline wear, hard shifting, grinding noise, gear jumping and abnormal backlash, widely used on Sinotruk Sitrak, Howo, MAN, DAF, IVECO and other long-haul heavy-duty tractor trucks.
 
Availability:
Quantity:
  • 1297 304 527

  • ZF

Product parameters

Basic Info

    • OE Part No.: 1297 304 527 (1297304527)
      • Brand: ZF

      • Product Type: Main Box 1st Gear / 1st & 2nd Gear Synchronizer Tooth Seat (Synchronizer Hub)

      • Compatible Gearbox: ZF Ecosplit 16S2530 16-speed heavy-duty manual truck transmission

      • Material: Alloy steel (20CrMnTi etc.), carburized quenched, precision internal spline structure

      • Applicable Vehicles: Sinotruk Sitrak, Howo T7H, MAN, DAF, IVECO, Renault heavy-duty long-haul tractor trucks

      • Category: ZF Heavy Truck Transmission Spare Parts – Main Box Synchronizer Components



  • Material & Advantages


  1. High-quality carburized alloy steel, high surface hardness, wear resistance and impact resistance, adapted to heavy-load low-speed climbing conditions

  2. Precision machined internal splines, enabling smooth sliding of the synchronizer sleeve, reducing shift impact and spline wear

  3. Standard OEM dimensions, perfect fit for the original main box synchronizer assembly, direct replacement during overhaul

  4. Vibration-resistant heavy-duty structure, preventing low-speed gear jumping and abnormal meshing noise on rough roads

  5. Improves low-gear shifting smoothness and protects the whole main box synchronizer system



Application


For ZF 16S2530 16-speed transmission overhaul and main box synchronizer maintenance. Replace when splines are worn, deformed, cracked or pitted, causing poor low-gear shifting and grinding noise. Clean spline surfaces and check matching synchronizer sleeves, cones and gears for wear; align correctly during assembly, follow official ZF torque specifications; use specified ZF heavy-duty transmission fluid; test 1st/2nd gear shifting after installation, confirm no abnormal noise or backlash.



Origin & Lead Time

In stock, delivery within 1–3 working days; bulk orders: 4–7 days; sea freight: 10–24 days


MOQ & Packing

MOQ: 1 piece
Warranty: 6 months, not covered for improper programming, water damage, overvoltage and unauthorized circuit modification
Packing: Anti-static bag + shockproof foam + reinforced export carton

About yongliwei

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Gearboxes assembly include brand ZF, Eaton, FAST, Allison, DONGFENG, DC, Benz, volvo, HOWO, WLY etc. Gearboxes parts includegear, synchronizer, PTO, housing, bearings, shaft, top cover, sensors, wireness, repair kits... etc.


Our products have been exported to more than 50 countries and regions such as Korea, Chile, Russia, Kazakhstan, USA, Ecuador, Turkey, Iran, Africa, Latin America, etc., and have been unanimously recognized by customers.


In the future, we will be committed to creating higher-end quality and more intimate service. And a more comfortable customer experience to build Yongliwei company into an auto parts supplier with excellent corporate culture, scientific development concept and continuous innovation ability.

Company information (1)

Shiyan Yongliwei Industry and Trading Co., Ltd. is a modern enterprise integrating design, development, production and sales of gearbox assembly and gearbox parts.


Our company was founded in Hubei province, China, and has been specialized the truck gearboxes in Chinese offline market for 21 years .Our parts are the leader of gearboxes area in the China now.


Our company was set up in the largest truck parts production base in the world –Shiyan city, Hubei, China, to meet the demand for products in the Asia and South American markets, a professional international trade sales team was born in Hubei in 2021.


Shiyan Yongliwei is focusing on creating high quality, high technology and high standard gearboxes and its parts.

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About Us
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