Grizzly® 40 HP Gearbox, 1-3/8 In. 6-Spline Input, 1-1/2 In. 12-Spline Output

#49332    $119.95 EA

Use this 40 HP gearbox replacement on your rotary mowers to get them working again. This gearbox has a 1-3/8 inch 6-spline input and a 1-1/2 inch 12-spline output.

Availability: In Stock -

Replace broken 40 HP gearboxes to get your rotary mower cutting again. This 40 HP gearbox has a 1-3/8 inch 6-spline input with a 1-1/2 inch 12-spline output. The gearbox gear ratio is 1:1.47.

This gearbox can stand up to heavy-duty cutting. The housing is constructed of 60-45-12 ductile iron and the gears are made of chromium steel with a titanium additive. A hub and breather plug are included. This gearbox is shipped without oil. It requires approximately 25 ounces of 85W-9 oil.


  • 40 HP gearbox for rotary cutters
  • 1-3/8 inch 6-spline input shaft: rotates CCW
  • 1-1/2 inch 12-spline output shaft: rotates CW
  • 60-45-12 ductile iron housing
  • Chromium steel with titanium housing
  • Gear ratio - 1:1.47
  • Bolt pattern: 4 on 4-3/4 in. by 4-3/4 in. center to center spacing, 6-1/2 in. circle bolt pattern
  • Bolt hole size: 5/8 inch
  • 5-1/4 inch center hole required for assembly
  • Includes hub and breather plug
  • Bushing included to weld stump jumper if needed
  • Shipped without oil. Follow instructions for proper oil usage
  • 1 inch nut in bottom

Brand: Grizzly

Your order is important to us and we will strive to process it as quickly as possible. Most in-stock items are shipped within 2-4 business days and typically deliver in 5-7 business days. In-stock items may ship from multiple locations and can arrive on separate days. Heavy or bulky items will ship via Freight/Truck Service and will take 8-10 business days for delivery. For those immediate product needs, we do offer at an additional cost express service from UPS and Motor freight.

Shipping costs are determined by item weight and your zipcode. Once you have entered your zipcode into checkout, your shipping total will be calculated and available for review, thank you.

If you have any questions please contact our Customer Service representatives at 1-800-345-0169

Standard UPS Ground Shipping Map -
UPS Ground
The above shipping chart applies to UPS ground shipments to the 48 contiguous states only. Please call 1-800-345-0169 for timing on shipments to Alaska, Hawaii, and Puerto Rico, thank you!

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