Transmission Gasket & Seal Kit | ZF Industries 3311199035

ZF Marine OEM Transmission Gasket & Seal Kit | 3311199035 | ZF 45C, 63C, 88C | Hurth HBW 450D

The ZF Marine #3311199035 is the OEM complete gasket and seal kit for resealing ZF 45C, 63C, and 88C marine transmission models, as well as the legacy Hurth HBW 450D. Includes all gaskets and seals required for a full transmission reseal service. Genuine ZF OEM part — not aftermarket. Replaces Hurth 3311199035 and 500595.

Part Details:

• Part Number: 3311199035 (ZF Marine)
• SKU: ZF-3311199035
• Manufacturer: ZF Marine (OEM)
• Type: Transmission Gasket & Seal Kit — Complete Reseal
• Fits: ZF 45C, ZF 63C, ZF 88C marine transmissions
• Also Fits: Hurth HBW 450D (legacy model)
• Replaces: Hurth 3311199035, Hurth 500595
• Contents: All gaskets and seals for complete transmission reseal
• Condition: New — Genuine ZF OEM

Cross-Reference — Replaces:

• Hurth: 3311199035, 500595

Additional Information

ZF and Hurth — Same Transmission Lineage:

ZF Friedrichshafen acquired Hurth Getriebe in the 1990s, and the Hurth marine transmission product line was absorbed into the ZF Marine brand. The Hurth HBW 450D is the legacy designation for what became the ZF 45 series under ZF ownership. This is why Hurth part numbers (3311199035, 500595) and ZF part number (3311199035) reference the same kit — the part number was carried over from Hurth into the ZF catalog. If your transmission is branded Hurth HBW 450D or ZF 45C/63C/88C, this is the correct OEM reseal kit.

ZF 45C, 63C, 88C — Which Transmission Do You Have?

The ZF 45/63/88 series are common inline marine transmissions used across a wide range of inboard diesel and gasoline engine applications. The number designates the torque capacity rating of the transmission (45, 63, or 88 Nm × 100). The “C” suffix indicates the transmission generation/variant within the series. All three models — 45C, 63C, and 88C — use the same gasket and seal kit (3311199035). Identify your transmission model from the nameplate on the transmission body before ordering to confirm you have a 45C, 63C, or 88C.

When to Use This Kit:

The 3311199035 kit is used for a complete transmission reseal — replacing all gaskets and seals during a full transmission disassembly/overhaul or when leak diagnosis confirms multiple seal failures. Typical reseal indicators:

• Oil weeping from the transmission case, end caps, or selector shaft
• Oil level dropping between service intervals without visible external damage
• Scheduled overhaul at high hours (consult ZF service documentation for recommended overhaul intervals)
• Water contamination in the transmission oil — milky appearance on dipstick or in drained oil

Genuine OEM — Not Aftermarket:

The ZF 3311199035 is a genuine ZF OEM kit, not an aftermarket replacement. OEM seal kits use materials and dimensional specifications matched to ZF's original design tolerances. For a transmission reseal on a ZF 45C, 63C, or 88C, OEM seals are strongly recommended over aftermarket alternatives to ensure proper sealing life and dimensional fit.

Installation Notes:

• Full transmission reseal requires complete disassembly — refer to ZF Marine service documentation for the ZF 45C/63C/88C overhaul procedure
• Clean all mating surfaces thoroughly before installing new gaskets — do not use silicone sealant as a substitute for any gasket in this kit
• Replace all seals in the kit during a reseal service — do not reuse any original seals
• Use ZF-specified transmission fluid when refilling after reseal — confirm the correct fluid specification in your ZF transmission service manual
• Pressure test or leak check after reassembly before returning the vessel to service

Frequently Asked Questions

1. Does this kit fit my Hurth HBW 450D transmission?
Yes — the Hurth HBW 450D is the legacy designation for what became the ZF 45 series after ZF's acquisition of Hurth. The 3311199035 kit covers the HBW 450D along with the ZF 45C, 63C, and 88C. Confirm your transmission model from the nameplate on the transmission body before ordering.

2. Is this a genuine ZF OEM kit or aftermarket?
Genuine ZF OEM. Part number 3311199035 is sourced directly from ZF Marine and is not an aftermarket replacement kit.

3. Does this kit include everything needed for a complete reseal?
Yes — the 3311199035 includes all gaskets and seals required for a complete transmission reseal on the ZF 45C, 63C, 88C, and Hurth HBW 450D. Refer to ZF's service documentation to confirm all components in the kit against the transmission's seal map before beginning disassembly.

4. What is the difference between the ZF 45C, 63C, and 88C?
The 45C, 63C, and 88C are different torque capacity ratings within the same ZF transmission series — the number indicates the transmission's torque handling capacity. All three use the same gasket and seal kit (3311199035). Identify your specific model from the transmission nameplate.

5. What transmission fluid should I use after the reseal?
Refer to your ZF Marine transmission service manual for the correct fluid specification for your specific model (45C, 63C, or 88C). ZF typically specifies an ATF or specific gear oil; the requirement may vary by model year and operating temperature range. Do not use an unspecified fluid.