1316304170 SYNCHRONIZER RING / MO Blocker Ring Suitable To ZF TRANSMISSIONS

SYNCHRONIZER RING /MO suitable to ZF TRANSMISSIONS 1316304170

1. Quick Notice

Confirm the OEM number 1316304170 on your original synchronizer ring before ordering. This ring is suitable for ZF manual transmissions. Verify transmission model (16S151, 16S1650, 16S221, etc.), gear position (1st/2nd typically), and ring orientation. Professional transmission technician required for installation.

2. Description

The 1316304170 synchronizer ring is a precision-engineered transmission component for ZF heavy-duty truck gearboxes. This ring sits between the gear and synchronizer hub, equalizing rotational speeds before tooth engagement. Manufactured from high-strength steel alloy with a machined friction cone. The inner surface features an oil evacuation pattern designed for rapid fluid clearance during shifting. Fits ZF 16-speed manual transmissions including 16S151, 16S1650, 16S1685, 16S181, 16S221, 16S220, and 16S2220TD series. Commonly installed in 1st/2nd gear synchronizer assemblies. Worn rings produce grinding noises during shifting, gear clash, or resistance entering gear. Replacement restores proper synchronization and shift quality. This is a single ring; verify quantity required for your specific gear position.

3. Parameters Table

4. Custom Content

Transmission Identification: Locate the transmission model plate on the gearbox housing. Compatible models include 16S151, 16S1650, 16S1685, 16S181, 16S221, 16S220, and 16S2220TD. This ring is typically used in 1st/2nd gear synchronizer positions for 16-speed ZF transmissions. Also compatible with certain Mercedes-Benz, Hino, and trucks equipped with ZF gearboxes.

Installation Check: Before assembly, examine the mating gear cone for scoring or glazing. The ring must fit snugly and produce resistance when pressed onto the gear cone and twisted. No resistance indicates wear requiring replacement. Install with the wider taper opening facing the gear cone. Mark orientation before removing the old ring.

Oil Requirement: Use GL-4 80W-90 gear oil. GL-5 oil damages synchronizer components. Verify oil specification before filling after reassembly.

5. FAQ

Q1: Which ZF transmissions use the 1316304170 synchronizer ring?
A1: This ring fits ZF 16S151, 16S1650, 16S1685, 16S181, 16S221, 16S220, and 16S2220TD series. Typically serves 1st and 2nd gear positions.

Q2: Is this ring suitable for Mercedes-Benz or Hino trucks?
A2: Yes, if the vehicle is equipped with a compatible ZF transmission. Hino 700 series with ZF gearboxes often use this ring. Confirm your transmission model before ordering.

Q3: How do I test my old ring for wear?
A3: Press the ring onto the mating gear cone and twist by hand. A functional ring locks or provides strong resistance. A worn ring spins freely with no friction.

Q4: What causes premature synchronizer ring failure?
A4: Low transmission oil, wrong oil viscosity (GL-5 instead of GL-4), aggressive shifting, clutch drag preventing full disengagement, or contaminated gear oil with metal particles.

Q5: How many rings are needed per transmission?
A5: Each gear position requires one ring. A 16-speed ZF transmission contains multiple rings for different gear positions. Verify which gear position is failing before ordering only one ring.

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