ZF 2094.311.025 SUN GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2094.311.025 SUN GEAR is a critical planetary gearset component engineered for the WG100, WG130, and WG131 transmission series. As an OEM genuine part, this sun gear transfers torque from the input shaft to the planetary pinions, directly influencing gear ratio engagement and overall driveline efficiency. The SKU 2094.311.025 identifies the exact hardened steel gear with precision-cut teeth designed to mesh seamlessly within the planetary carrier assembly. This component sits at the center of the planetary system, working in concert with the 2094101012: TRANSMISSION HOUSING to maintain proper alignment and oil flow paths. Without a properly functioning sun gear, the transmission cannot achieve its designed torque multiplication or shift quality.

Symptoms of Failure

• Erratic gear engagement or slipping during acceleration — Worn sun gear teeth cause the planetary pinions to lose positive contact, resulting in delayed or harsh shifts under load.
• Metallic grinding or whining noise from the transmission housing — Pitting or spalling on the sun gear surface generates audible debris sounds, especially in neutral or low gear ranges.
• Contaminated transmission fluid with metallic particles — As the sun gear wears, fine steel shavings circulate through the system, clogging the filter and damaging the 2094301036: HOUSING oil passages.
• Loss of power transfer in forward or reverse — A cracked or stripped sun gear prevents the planetary set from locking, causing the vehicle to stall or fail to move under power.

Technical Specifications

Compatibility

This sun gear is specifically designed for ZF WG100, WG130, and WG131 series transmissions. It is also compatible with select WG180 and WG200 variants that share the same planetary carrier architecture. Always verify the transmission serial number before installation. The gear interfaces directly with the 2094298057: HOUSING and is sealed by the 2094301071: COVER to prevent contamination. For complete rebuilds, pairing this sun gear with new seals and gaskets is strongly recommended to ensure long service life.

Related Components

{
“@context”: “https://schema.org”,
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What transmission models use the ZF 2094.311.025 sun gear?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “This sun gear is designed for ZF WG100, WG130, and WG131 transmissions. It may also fit certain WG180 and WG200 variants with matching planetary carriers.”
}
},
{
“@type”: “Question”,
“name”: “How do I know if my sun gear is failing?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Common failure signs include metallic grinding noises from the transmission, slipping during gear changes, and metal particles found in the transmission fluid.”
}
},
{
“@type”: “Question”,
“name”: “Can I replace just the sun gear without rebuilding the entire transmission?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes, the sun gear can be replaced individually, but it is recommended to inspect and replace related seals, gaskets, and the housing cover to prevent future failures.”
}
}
]
}