ZF 2093.309.044 CROWN WHEEL | OEM Genuine Part

Overview

The ZF 2093.309.044 CROWN WHEEL is a critical hypoid ring gear engineered for the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part transfers rotational torque from the differential side gears to the axle shafts, enabling smooth power delivery under extreme loads. The SKU 2093.309.044 is precision-machined to mate with the pinion gear, ensuring correct backlash and tooth contact patterns within the differential carrier. When installed alongside the 5838109012: DIFFERENTIAL, this crown wheel forms the core of the final reduction stage, directly affecting traction and machine mobility.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn tooth profiles on the crown wheel create uneven gear mesh, producing a distinct high-pitched whine that intensifies under load—a common search query for “ZF transmission whining noise fix.”
• Vibration in the driveline at low speeds: Excessive backlash from a damaged crown wheel causes driveline shudder, often described as “crown wheel vibration symptoms” in construction equipment forums.
• Metallic debris in the transmission oil: Flaking or pitting on the gear teeth sheds metal particles into the lubricant, detectable during oil changes—a key indicator for “crown wheel failure debris in oil.”
• Intermittent loss of drive under heavy load: Severe tooth breakage or spalling prevents the crown wheel from engaging the pinion, leading to sudden power loss, especially when climbing grades.

Technical Specifications

Compatibility

This crown wheel is designed for ZF WG-series powershift transmissions commonly used in wheel loaders, graders, and dump trucks. It directly fits the differential assemblies of the ZF WG180, WG200, and WG210 models. For proper installation, the crown wheel must be paired with the 0750117075: TAPER ROLLER BEARING to support axial and radial loads. The assembly also requires the 2093209023: DIFFERENTIAL unit to house the side gears, and the 5838300626: DIFFERENTIAL HOUSING to enclose the entire carrier. Always verify your transmission model’s serial number before ordering.

Related Components

Frequently Asked Questions

Q: Can the ZF 2093.309.044 crown wheel be reused after a differential failure?
A: No. Once the crown wheel shows pitting, spalling, or uneven wear, it must be replaced as a matched set with the pinion gear. Reusing a worn crown wheel accelerates bearing and housing damage.

Q: What is the torque specification for the crown wheel mounting bolts?
A: The 12 M12 bolts should be torqued to 120 Nm (88 lb-ft) in a cross-pattern sequence, using Loctite 243 thread locker. Always consult the ZF service manual for your specific transmission model.

Q: How do I identify if my ZF transmission uses this crown wheel?
A: Check the transmission nameplate for model numbers WG180, WG200, or WG210. The crown wheel part number 2093.309.044 is stamped on the outer edge of the gear. If you have a different model, cross-reference with the 5838300626: DIFFERENTIAL HOUSING part number to confirm compatibility.