You want reliable transaxle pump seals that fit and last. Start with Hydro-Gear kits for direct-fit gerotor and shaft seals on ZT models, and consider the Hydro-Gear charge pump kit for a full rebuild.
Kefly’s kit offers wide fitment and a strong warranty, making it a smart spare.
For OE-level precision, the GM pump seal and pump cover gasket match factory specs and materials.
| Transaxle Seal Service Kit for Hydro-Gear ZT Series |
| Best Overall | Compatibility / Fit: Hydro-Gear ZT series (ZT-2800, ZT-3100, ZT-3200, ZT-3400) | Purpose / Function: Restore transaxle performance; stop leaks; improve charge pump efficiency | OE / Replacement Part Reference: Direct OE replacement 72994 | VIEW LATEST PRICE | Read Our Analysis |
| Kefly Transmission Seal Kit for ZT-2800/3100/3200 |
| Best Value | Compatibility / Fit: Hydro-Gear ZT-2800/3100/3200/3400 (ZH–ZM series driveshafts) | Purpose / Function: Prevent leaks; maintain pump pressure; protect pump internals | OE / Replacement Part Reference: Replaces Hydro-Gear 72994, 71410, 73107; compatible with Bad Boy 050-2010-00 | VIEW LATEST PRICE | Read Our Analysis |
| GM Genuine Parts 24210605 Automatic Transmission Fluid Pump Seal |
| OEM Choice | Compatibility / Fit: GM vehicle transmission fluid pump (GM OE fit) | Purpose / Function: Seal transmission fluid pump to prevent leaks (OEM replacement) | OE / Replacement Part Reference: GM Genuine Parts 24210605 (OEM part number) | VIEW LATEST PRICE | Read Our Analysis |
| GM Genuine Parts 12337931 Automatic Transmission Fluid Pump Cover Gasket |
| Vehicle-Specific Fit | Compatibility / Fit: GM vehicle transmission fluid pump cover (vehicle-specific GM fit) | Purpose / Function: Gasket for pump cover to prevent fluid leaks (OEM replacement) | OE / Replacement Part Reference: GM Genuine Parts 12337931 (OEM part number) | VIEW LATEST PRICE | Read Our Analysis |
| Hydro-Gear Transmission/Charge Pump Seal Service Kit |
| Professional Grade | Compatibility / Fit: Hydro-Gear ZT-2800, ZT-3100, ZT-3200, ZT-3400 (ZH–ZM series) | Purpose / Function: Replace degraded pump seals to prevent leaks and maintain pressure | OE / Replacement Part Reference: Replaces Hydro-Gear 72994, 71410, 73107; also Bad Boy 050-2010-00 | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Transaxle Seal Service Kit for Hydro-Gear ZT Series
Assuming you’re maintaining Hydro-Gear ZT series transaxles and want a straightforward repair that really stops leaks, this Transaxle Seal Service Kit is the best choice because it gives you every seal and gasket you’ll need in one package. You’ll get a complete rebuild set with gerotor seals, O-rings, gaskets, and shaft seals that fit ZT-2800, ZT-3100, ZT-3200, and ZT-3400 as a direct OE replacement for 72994. The nitrile and reinforced rubber resist cracking and hold up from minus 40 to 250 degrees. That means restored performance, less fluid loss, better charge pump efficiency, and fast email support.
- Compatibility / Fit:Hydro-Gear ZT series (ZT-2800, ZT-3100, ZT-3200, ZT-3400)
- Purpose / Function:Restore transaxle performance; stop leaks; improve charge pump efficiency
- OE / Replacement Part Reference:Direct OE replacement 72994
- Kit / Component Content:Complete rebuild set (charge pump gerotor seals, O-rings, gaskets, shaft seals)
- Durability / Material Characteristics:Oil-resistant nitrile and reinforced rubber; -40°F to 250°F; resistant to cracking
- Support / Warranty:Customer support via email; responses within 24 hours
- Additional Feature:Direct OE replacement
- Additional Feature:Charge pump gerotor seals
- Additional Feature:Wide temperature range
Kefly Transmission Seal Kit for ZT-2800/3100/3200
Should you want a reliable seal kit that fits Hydro-Gear ZT-2800, ZT-3100, and ZT-3200 drive systems, the Kefly Transmission Seal Kit is a strong choice you’ll appreciate. You’ll find it fits many Z-series shafts including ZH, ZJ, ZK, ZL, ZM and covers rebuilds and charge pump gerotor systems. It replaces Hydro-Gear numbers 72994, 71410, 73107 and matches Bad Boy 050-2010-00. The kit includes sealing plugs, lips, dust seals, washers, bolts, rings, pins, all made from durable materials for varying temperatures. You get two years protection and seller support promising prompt issue resolution within 24 hours.
- Compatibility / Fit:Hydro-Gear ZT-2800/3100/3200/3400 (ZH–ZM series driveshafts)
- Purpose / Function:Prevent leaks; maintain pump pressure; protect pump internals
- OE / Replacement Part Reference:Replaces Hydro-Gear 72994, 71410, 73107; compatible with Bad Boy 050-2010-00
- Kit / Component Content:Sealing plugs, lips, dust seals, washers, bolts, rings, pins
- Durability / Material Characteristics:High-strength materials for temperature range and machine operation
- Support / Warranty:2-year product protection; seller support with 24-hour resolution promise
- Additional Feature:Replaces multiple part numbers
- Additional Feature:Includes bolts/washers/pins
- Additional Feature:2-year product protection
GM Genuine Parts 24210605 Automatic Transmission Fluid Pump Seal
Provided that you want a reliable, direct replacement for a GM transmission pump seal, the GM Genuine Parts 24210605 is a smart choice for owners and mechanics who value exact fit and long-term peace of mind. You’ll get a seal made to GM OE specification, so it fits and works like the original. Because it’s made in the United States, you can expect consistent quality and durable materials. You can use it anywhere an OEM pump seal is required, and it’s meant to meet original equipment performance. You’ll feel confident installing a part that aims to reduce leaks and protect your transmission.
- Compatibility / Fit:GM vehicle transmission fluid pump (GM OE fit)
- Purpose / Function:Seal transmission fluid pump to prevent leaks (OEM replacement)
- OE / Replacement Part Reference:GM Genuine Parts 24210605 (OEM part number)
- Kit / Component Content:Single pump seal component (pump seal)
- Durability / Material Characteristics:Manufactured to GM OE specification (quality/durability implied)
- Support / Warranty:GM Genuine Parts support/quality assurance (standard OEM support)
- Additional Feature:GM OE specification
- Additional Feature:Made in United States
- Additional Feature:OEM vehicle fitment
GM Genuine Parts 12337931 Automatic Transmission Fluid Pump Cover Gasket
Should you want a reliable, vehicle-specific replacement that fits like the original, the GM Genuine Parts 12337931 pump cover gasket is a smart choice for anyone working on GM transmissions. You’ll get an OE-equivalent gasket made in the United States, so you can trust the fit, form, and function. It’s made to GM specification, and it replaces worn or damaged pump cover gaskets during service. Before you install it, confirm the vehicle-specific fit so you avoid surprises. You’ll appreciate the durability and reliability whenever you need leak-free performance, and it eases the stress of transmission repairs.
- Compatibility / Fit:GM vehicle transmission fluid pump cover (vehicle-specific GM fit)
- Purpose / Function:Gasket for pump cover to prevent fluid leaks (OEM replacement)
- OE / Replacement Part Reference:GM Genuine Parts 12337931 (OEM part number)
- Kit / Component Content:Pump cover gasket component
- Durability / Material Characteristics:Manufactured to GM OE specification (fit/form/function reliability)
- Support / Warranty:GM Genuine Parts support/quality assurance (standard OEM support)
- Additional Feature:OE-recommended replacement
- Additional Feature:Vehicle-specific fit
- Additional Feature:Made in United States
Hydro-Gear Transmission/Charge Pump Seal Service Kit
Should you care about keeping your mower or utility vehicle running without leaks and loss of power, the Hydro-Gear Transmission/Charge Pump Seal Service Kit is a smart pick because it replaces the exact seals that wear out in ZT-series transaxles and G700 charge pumps. You’ll get seals for ZT-2800, ZT-3100, ZT-3200 models and the G700 gerotor pump. The kit contains plugs, lips, dust seals, gaskets, bolts, washers, rings and pins. It replaces Hydro-Gear 72994, 71410, 73107 and Bad Boy 050-2010-00. Parts are tested before shipping and seller support helps should you require guidance. Verify fit before purchase.
- Compatibility / Fit:Hydro-Gear ZT-2800, ZT-3100, ZT-3200, ZT-3400 (ZH–ZM series)
- Purpose / Function:Replace degraded pump seals to prevent leaks and maintain pressure
- OE / Replacement Part Reference:Replaces Hydro-Gear 72994, 71410, 73107; also Bad Boy 050-2010-00
- Kit / Component Content:Seal plugs, seal lips, dust seals, gaskets, bolts, washers, rings, pins
- Durability / Material Characteristics:Tested parts; materials suitable for hydraulic seals (quality assurance stated)
- Support / Warranty:Seller support; products 100% tested prior to delivery; contact for resolution
- Additional Feature:100% tested prior delivery
- Additional Feature:Includes G700 gerotor seal
- Additional Feature:Broad transaxle series coverage
Factors to Consider When Choosing Automatic Transaxle Pump Seals
Whenever you pick a transaxle pump seal, consider initially about material compatibility so the seal resists the fluid and any additives your system uses. Also check the temperature range and seal design type because they determine how well the seal holds up under heat and pressure. Finally, make sure the kit is complete and includes warranty coverage so you’re protected in case parts fail or don’t fit.
Material Compatibility
Because a seal only works provided its material matches the fluids and conditions it sees, you’ll want to pick materials with care and confidence. You should initially match material to hydraulic fluid, using nitrile for standard petroleum fluids and fluorocarbon or Viton for synthetic or higher-stress fluids. At the same time check that the compound resists oil, gear additives, glycol coolants, and common contaminants so it won’t swell or crack. Consider mechanical strength too. Choose elastomers with good tensile and tear resistance or reinforced constructions whenever shafts move or pressure spikes occur. Prefer compounds with low compression set and proven wear resistance so sealing pressure holds over time. These choices help prevent leaks, reduce repairs, and keep you moving with less worry.
Temperature Range
In case you want your transaxle pump seals to last and keep leaks away, pick materials that handle the full temperature swing they’ll see in service. You should choose seals rated for your system temperatures, often -40°F to 250°F, so they won’t harden in cold or degrade in heat. Check how the seal and mating metal expand with temperature, since mismatched growth can loosen compression and cause leaks. Consider both ambient conditions and transmission heat spikes whenever you compare continuous and intermittent ratings. Also confirm the compound resists chemical breakdown sped up through heat from fluids and contaminants. Finally, use seals with proven low-temperature flexibility to avoid shrinkage, brittleness, radial leakage, or extrusion during cold starts.
Seal Design Type
You’ve already picked materials that will survive the heat and cold, and now you need to pick the right seal design to match how the pump actually works. You’ll choose between lip seals and mechanical face seals by comparing shaft speed and pressure. Lip seals hug the shaft and work well on smooth, hardened surfaces with Ra below 0.8 µm. Should your charge pump runs at high pressure, pick reinforced lips or sprung elements so the seal keeps contact and resists extrusion. Consider static versus operational roles and pick single lip, double lip, dust lip, or face seal geometries that balance contamination exclusion and fluid retention. Match the elastomer to temperature and fluid. Nitrile suits mineral oil. FKM suits higher heat and aggressive fluids.
Kit Completeness
A complete kit gives you confidence and saves time through putting every seal and small part you’ll need into one box. When you choose a kit, make sure it covers internal and external sealing parts for a full rebuild, like gerotor seals, O-rings, shaft seals, gaskets, washers, rings, pins, and bolts. Also check that both dynamic seals for rotating parts and static seals like gaskets and O-rings are included so leaks and pressure loss are addressed. Look for replacement of wear areas such as sealing lips and dust seals to avoid premature failure from contamination or wear. Prefer kits with correct sizes for your transaxle model and include installation hardware when original fasteners are corroded or damaged.
Warranty Coverage
You picked a complete seal kit, and that was smart; now you’ll want a warranty that protects your work and money. Check how long coverage lasts, like one year, two years, or lifetime, so it matches how long you expect the seal to last under your driving and climate. Next, confirm what’s covered: parts only, parts plus labor, and whether related damage to the pump or transaxle is included or excluded. Read conditions that void coverage, such as improper installation, wrong fluids, contamination, or overheating. Learn the claims process, required receipts, time limits, and how fast replacements arrive. Prefer clear remedies—replacement, refund, or repair—with no heavy pro rata fees or concealed deductibles.
