Hydro-Gear 1015-1057R ZT-5400 RH Transaxle

Hydro-Gear 1015-1057R ZT-5400 RH Integrated Hydrostatic Transaxle

The Hydro-Gear 1015-1057R Integrated Hydrostatic Transaxle is a commercial zero-turn mower drive transaxle used on select Ferris, Snapper Pro, Simplicity, and STIHL applications. This unit is listed as a ZT-5400 RH transaxle with OEM wording TRANSAXLE, ZT5400, RH, 1015-1057R L AXLE.

This transaxle is commonly associated with Ferris 5103963, Snapper 5103963 / 5110534, and STIHL WB05 640 0110 where listed in the correct hydraulic group or parts diagram. It is commonly searched as Hydro-Gear 1015-1057R, Ferris 5103963 transaxle, Snapper Pro S200XT transaxle, Simplicity 3900 transaxle, STIHL WB05 640 0110 hydraulic transaxle, or ZT-5400 RH hydrostatic transmission.

Always verify with your full mower model and serial number, or directly from the transaxle tag on the unit being replaced. Hydrostatic transaxles can vary by side, axle, linkage, brake setup, pulley, fan, fittings, and internal specification. Do not order by mower series or deck size alone.

NOTE: The picture is for reference only. Your unit may look different than pictured.

Product Details

Cross Reference / Related Part Numbers

• Hydro-Gear 1015-1057R
• Ferris 5103963
• Snapper 5103963
• Snapper 5110534
• STIHL WB05 640 0110
• STIHL WB056400110

Required Order Verification

To help confirm the correct transmission, please add the following information to the Special Instructions for Seller section of your order:

• Your mower model number
• Your mower serial number
• The transmission numbers located on the transaxle tag itself
• The side being replaced: right-hand or left-hand as seated in the operator position

This step is required because the same mower series can use different transaxles depending on serial range, side, axle configuration, linkage, brake setup, and hydraulic group.

Fits Select Ferris Models

This where-used list is provided as a reference only. Always verify your full model number, serial number, transmission tag, side, and parts diagram before ordering.

Fits Select Snapper Pro Models

This transaxle is also listed for select Snapper Pro S200XT zero-turn rider applications. Verify your serial number carefully on models with serial-number splits.

Fits Select Simplicity Models

This transaxle is listed for select Simplicity 3900 zero-turn rider applications. Confirm your exact model and serial number before ordering.

Fits Select STIHL RZ Models

STIHL reference part number: WB05 640 0110. Listed under the hydraulic group for select RZ models.

Key Features

• Hydro-Gear integrated hydrostatic transaxle
• Hydro-Gear part number 1015-1057R
• ZT-5400 series transaxle
• RH / right-hand transaxle where listed
• OEM wording: TRANSAXLE, ZT5400, RH, 1015-1057R L AXLE
• Associated Ferris part number 5103963
• Associated Snapper part numbers 5103963 and 5110534
• Associated STIHL part number WB05 640 0110
• Used on select commercial zero-turn hydraulic drive systems
• Factory-style replacement when verified by transmission tag, side, serial number, and parts diagram

Important Fitment Notes

• This listing is for Hydro-Gear part number 1015-1057R
• Cross-reference numbers include Ferris 5103963, Snapper 5103963, Snapper 5110534, and STIHL WB05 640 0110
• Always verify with full model and serial number or directly from the transaxle tag
• Confirm right-hand or left-hand side before ordering
• Verify hydraulic group, linkage, brake setup, fan, pulley, fittings, axle configuration, and transmission tag number
• Do not order by mower series, engine model, or deck size alone
• Serial-number split models must be checked carefully before ordering
• The picture is for reference only; your unit may look different than pictured
• Some applications may require additional seals, oil, filters, fittings, fan, pulley, linkage parts, brake parts, or hardware

Installation and Service Notes

Hydrostatic transaxle replacement should be performed by a qualified technician familiar with commercial zero-turn hydraulic drive systems. Follow the service manual for your exact mower model.

• Park the mower on a flat surface, disengage the blades, set the parking brake, shut the engine off, and remove the key
• Confirm the replacement side before removing the original transaxle
• Inspect hydraulic oil, filters, hoses, fittings, cooling fan, pulley, belt, brake components, and control linkage
• Replace worn or contaminated related parts as needed
• Fill with the correct oil specified for your mower and transmission
• Purge the hydraulic drive system according to the service procedure before returning the mower to use
• Check for leaks and verify neutral, tracking, brake function, and drive response after installation

Part Number / Search Terms

• Hydro-Gear 1015-1057R
• 1015-1057R transaxle
• 10151057R transmission
• ZT5400 RH transaxle
• ZT-5400 right hand transmission
• TRANSAXLE ZT5400 RH 1015-1057R L AXLE
• Ferris 5103963
• Ferris 5103963 transaxle
• Ferris IS2100Z transaxle
• Ferris IS3200Z transaxle
• Ferris F320Z transaxle
• Snapper 5103963
• Snapper 5110534
• Snapper Pro S200XT transaxle
• Snapper S200XT 61 transaxle
• Snapper S200XT 72 transaxle
• Simplicity 3900 transaxle
• STIHL WB05 640 0110
• STIHL WB056400110
• STIHL RZ 960 hydraulic transaxle
• STIHL RZ 972 hydraulic transaxle
• Integrated hydrostatic transaxle
• Zero-turn mower hydrostatic transmission
• Hydro-Gear integrated transaxle

Frequently Asked Questions

P&P Small Engines stocks Hydro-Gear transmissions, Ferris mower parts, Snapper Pro commercial mower parts, Simplicity mower parts, STIHL RZ mower parts, hydraulic filters, belts, pulleys, fans, seals, and commercial zero-turn replacement parts.