ZF 2093.070.055 TRA 20 | OEM Genuine Part

Overview

This OEM genuine ZF 2093.070.055 TRA 20 is a critical internal component designed for the differential assembly within heavy-duty construction machinery transmissions. It functions as a precision-machined spacer or thrust element, ensuring correct axial clearance and load distribution between rotating gear sets. The SKU 2093.070.055 sits directly within the differential housing, working in concert with the 2093109048 DIFFERENTIAL to maintain gear mesh accuracy under high torque loads. Its robust construction prevents metal-to-metal contact, extending the service life of the entire drivetrain assembly.

Symptoms of Failure

• Excessive differential housing noise: A distinct whining or grinding sound from the axle area during turns or acceleration indicates the 2093.070.055 has worn beyond tolerance, allowing gear backlash to increase.
• Oil leaks around the differential cover: When this part fatigues, it can cause misalignment that stresses seals, leading to visible hydraulic fluid seepage from the transmission housing.
• Intermittent gear slipping under load: Operators may notice a momentary loss of drive power when climbing grades or pushing heavy material, as the worn component fails to maintain proper preload on the 0750117075 TAPER ROLLER BEARING.
• Metallic debris in transmission oil: Advanced wear of the 2093.070.055 generates fine steel particles that contaminate the lubricant, accelerating damage to adjacent gears and bearings.

Technical Specifications

Parameter	Value
OEM Part Number	2093.070.055
Material	Case-hardened alloy steel (20MnCr5 equivalent)
Outer Diameter	85.0 mm
Inner Diameter	45.0 mm
Thickness	12.5 mm
Weight	0.42 kg
Surface Hardness	58-62 HRC
OEM Reference	ZF TRA 20

Compatibility

This genuine ZF 2093.070.055 TRA 20 is engineered for use in the following ZF transmission families commonly found in construction machinery such as wheel loaders, graders, and telehandlers:

• ZF WG180 series
• ZF WG200 series
• ZF WG210 series
• ZF Ergopower 3-speed models

It is a direct replacement for the 2093209094 DIFFERENTIAL assembly’s internal spacer and should be inspected whenever the 2093309078 DIFF.HOUSING is removed for service.

Related Components

Part Number	Name	Function
2093109048	DIFFERENTIAL	Distributes torque between drive wheels
0750117075	TAPER ROLLER BEARING	Supports axial and radial loads on differential shaft
2093209094	DIFFERENTIAL	Secondary differential unit for multi-axle drive
2093309078	DIFF.HOUSING	Encloses and aligns differential gear set
0631100223	SPRING PIN	Secures differential components to shaft
0730300820	THRUST WASHER	Reduces friction between rotating gears
4482360002	AXLE BEVEL GEAR	Transfers power from differential to axle shaft
2097309085	DIFFERENTIAL AXLE	Driveshaft connecting differential to wheel hub
5838300811	THRUST WASHER	Controls end-play in differential carrier
4482360001	DIFFERENTIAL BEVEL GEAR	Primary gear for torque splitting in differential

Frequently Asked Questions

Q: How do I know if the 2093.070.055 is the correct part for my ZF transmission?
Verify your transmission model against the compatibility list above. This part is specifically designed for WG180, WG200, and WG210 series. Always cross-reference your old part’s dimensions with the technical specifications table.

Q: Can I replace this part without removing the entire differential?
In most cases, the differential housing must be opened to access the 2093.070.055. We recommend replacing the 0750117075 TAPER ROLLER BEARING simultaneously, as wear on one component often affects the other.

Q: What is the typical lifespan of this TRA 20 component?
Under normal construction machinery operating conditions, the 2093.070.055 lasts approximately 4,000-6,000 hours. Heavy loads or contaminated oil can significantly reduce this interval.