WQSING 5-Speed Transmission for Bobcat 9-Spline Input Shaft - Direct-Fit Replacement 4127203, Heavy-Duty

WQSING 5-Speed with Reverse 9-Spline Transmission 4127203 is a direct-fit replacement gear assembly designed to restore shifting performance in compatible Bobcat models using a 9-spline input shaft.

This heavy-duty transmission unit, listed under several cross-reference numbers (4127203, 1-323500, 132-4720, 137-4105 and others), delivers five forward gears plus reverse and is built for equipment owners and mechanics who need a reliable drivetrain component. It’s intended as a mechanical replacement for worn or damaged transmissions that share the specified spline and mounting characteristics. Before purchasing, confirm fitment against your machine’s original part number or contact us for compatibility help.

Which machines and part numbers is this compatible with?

The WQSING transmission corresponds with multiple cross-reference numbers used across compact loader and small equipment lines. Compatibility depends on your machine’s input-spline count, mounting pattern and original part code.

• Primary part number: 4127203 and equivalents like 1-323500 and 132-4720.
• Also cross-referenced as 137-4105, 39490001, 700-070 series and other OEM codes.
• Requires a 9-spline input shaft—verify your existing shaft before ordering.
• Contact the seller with your VIN/service or current part number if you are unsure.

How does installation affect performance and what should a mechanic check?

Installing a correctly matched transmission restores gear selection, reduces slippage and returns proper drive ratios. A trained technician should inspect front and rear seals, clutch linkage, and driveshaft alignment during replacement to avoid premature issues.

• Verify spline engagement and shaft seating to prevent binding.
• Replace gaskets, seals and fluids per manufacturer specifications.
• Test all gears under light load to confirm smooth engagement before full operation.

What are the key mechanical specifications I need to know?

This unit offers five forward speeds plus a reverse gear and uses a 9-spline input shaft. Other important details include its list of cross-reference numbers and that it’s marketed as a direct replacement transmission for equipment using those codes.

• Gearset: 5 forward speeds with 1 reverse.
• Input connection: 9-spline shaft required.
• Cross-reference: includes 4127203, 700-070 series, 794626, 794816 and related numbers.
• Inspect mounting flange and bolt pattern for fitment confirmation.

What support and warranty or purchase tips should I consider?

Before ordering, gather your machine’s current transmission part number and measurements. If you’re uncertain about compatibility, reach out to the seller for clarification to avoid returns and downtime. Keep proof of purchase and document installation steps for any warranty needs.

• Save original part number and take photos of the existing transmission for comparison.
• Ask the supplier about return windows, warranty length and claimed coverage.
• Consider professional installation and a post-install inspection to validate performance.

Who is this for: The WQSING 5-Speed with Reverse 9-Spline Transmission 4127203 is aimed at owners, shop technicians and fleet managers of compact loaders and similar equipment that require a direct-fit drivetrain replacement. It’s suited to anyone who needs to replace a failing gearbox with a unit matching the 9-spline input shaft and the listed cross-reference numbers. If you maintain older Bobcat or equivalent machines and need a robust transmission replacement, this part is intended to meet those repair and uptime demands—just confirm compatibility before purchase.