--- product_id: 129463499 title: "Patco 40hp Gearbox with 1-3/8\" X 6 Spline Input Shaft and 1.57\" X 12 Spline Output Shaft" brand: "patco" price: "3107.11 DT" currency: TND in_stock: true reviews_count: 7 category: "Patco" url: https://www.desertcart.tn/products/129463499-patco-40hp-gearbox-with-1-3-8-x-6-spline store_origin: TN region: Tunisia --- # 1.57" x 12 spline output shaft 4-bolt 4.75" mounting 40hp rated power Patco 40hp Gearbox with 1-3/8" X 6 Spline Input Shaft and 1.57" X 12 Spline Output Shaft **Brand:** patco **Price:** 3107.11 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your rotary cutter with precision power — don’t get left behind! ## Quick Answers - **What is this?** Patco 40hp Gearbox with 1-3/8" X 6 Spline Input Shaft and 1.57" X 12 Spline Output Shaft by patco - **How much does it cost?** 3107.11 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/129463499-patco-40hp-gearbox-with-1-3-8-x-6-spline) ## Best For - patco enthusiasts ## Why This Product - Trusted patco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Spline-Perfect Shafts:** Features a 1-3/8" diameter input shaft with 6 splines and a 1.57" diameter output shaft with 12 tapered splines for seamless compatibility. - • **Wide Brand Compatibility:** Fits top brands like John Deere, Kubota, Bush Hog, and more—join the elite circle of pros who trust Patco. - • **Precision 4-Bolt Mounting:** Engineered for a secure 4.75" on-center bolt pattern ensuring hassle-free installation and rock-solid fit. - • **Robust 40hp Gearbox Power:** Designed to handle up to 40 horsepower, delivering reliable performance for demanding rotary cutter applications. - • **Tailored Fit, No Guesswork:** Not universal—engineered specifically for 4-bolt mounting gearboxes with exact spline and shaft specs to avoid costly mismatches. ## Overview The Patco 40hp Gearbox is a high-performance replacement unit designed for rotary cutters with a 4-bolt 4.75" mounting pattern, 1-3/8" x 6 spline input shaft, and 1.57" x 12 spline output shaft. Rated for 40-45 horsepower, it fits major brands like John Deere, Kubota, and Bush Hog, offering a reliable, exact-fit solution for professionals seeking durable drivetrain upgrades. ## Description Replacement Rotary Cutter gearbox, 40/45hp rated, 1-3/8" - 6 spline input shaft, 1.57" X 12 tapered spline output shaft and 1:1.47 speed up ratio for most rotary cutters with slip clutch PTO drivelines.. Fits Fred Cain, WAC, Big Bee, New Holland, John Deere, Kubota, Land Pride, Rhino, Bush Hog and many more brands. These gearboxes can have a square, round or 5 Sided housing and all are interchangeable with the same mounting patters, gear ratio, and shaft dimensions. If your gearbox has a 1.57" diameter by 12 spline output shaft and a 1-3/8 - 6 spline input shaft this gearbox will work. Bolt pattern is 4-3/4" on center hole to hole and 6-3/4" center to center of bolt hole on diagonal. Thefour (4) mounting holes form a square bolt pattern. THIS IS NOT A UNIVERSAL FIT GEARBOX, IT WILL ONLY REPLACE 4 BOLT MOUNTING GEARBOXES WITH A 1-3/8" BY 6 SPLINE FRONT SHAFT AND A 1.57" BY 12 SPLINE BOTTOM SHAFT. PLEASE COMPARE DIMENSION AND SHAFT SPECIFICATIONS BEFORE BUYING! Review: Good Replacement - Good replacement on my Fred Cain 6ft bush hog. Has been working well for about a year now. No problems with hole spacings or splines on installation. Recommend Review: Very impressed worked for my wolverine brush hog - I work for a local tree service and we have a wolverine brush hog and needed to replace the gear box and after not being able to get a new one I needed to do a little modification but hight and everything worked just need to cut pto spline down but would definitely recommend 👍 ## Features - 4 BOLT MOUNTING 4-3/4" ON CENTER - 1-3/8" DIAMETER INPUT SHAFT WITH 6 SPLINES - 1.57" DIAMETER OUTPUT SHAFT WITH 12 TAPER SPLINES - WILL NOT REPLACE GEARBOXES WITH 6 BOLT MOUNTING, WILL NOT REPLACE GEARBOXES WITH SMOOTH INPUT SHAFTS, WILL NOT REPLACE GEARBOXES WITH 1-3/8" DIAMETER INPUT SHAFT WITH 21 SPLINES OR 1-3/4" INPUT SHAFT WITH 20 SPLINES! ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.6 out of 5 stars 35 Reviews | ## Images ![Patco 40hp Gearbox with 1-3/8" X 6 Spline Input Shaft and 1.57" X 12 Spline Output Shaft - Image 1](https://m.media-amazon.com/images/I/51Niie6bFwL.jpg) ## Questions & Answers **Q: I have a jcct xh30.192z.01l gearbox 1/1.92 ratio 6 spline horizontal and 12 spline vertical shafts off a 72' wolverine hydraulic mower will this fit?** A: I put this on the same mower, you’ll have to drill 2 new holes. Works great have about 40 hrs on it with no issues **Q: The measurement is the same but the imput shaft has 1" thats smooth then 6 spline, will this work?** A: That will depend on the type of slip clutch PTO shaft you have, If you slip clutch just mounts onto the splined shaft and has a bolt that cinches it ( locks it) to the shaft this gearbox will work, if your sli clutch slides on the shaft and has a circlip or snap ring that installs to the groove just past the smooth tip on the gearbox this unit will not work! If you still are not certain please give us a call at 513-715-0531 and we can discuss the mounting of the clutch in more detail. Thank you, Thank you **Q: will this fit a Landpride FDR 1672 finish mower** A: No, It won't fit. The Finish mower generally uses a gearbox with a smooth, keyed output (pulley) shaft. They usually turn the blade pulleys clockwise. Rotary cutters (brush hogs) turn counter clockwise. The ratios are generally higher than a brush hog bog, in the 1:1.92 rpm minimum, up to 1:2.85, some even will turn a 1:3.0 rpm **Q: What is the distance from center of input to bottom of mounting flange** A: 6-7/16” to the centerline of the input shaft from the bottom of the mounting flange ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good Replacement *by R***E on February 19, 2026* Good replacement on my Fred Cain 6ft bush hog. Has been working well for about a year now. No problems with hole spacings or splines on installation. Recommend ### ⭐⭐⭐⭐⭐ Very impressed worked for my wolverine brush hog *by S***. on July 2, 2021* I work for a local tree service and we have a wolverine brush hog and needed to replace the gear box and after not being able to get a new one I needed to do a little modification but hight and everything worked just need to cut pto spline down but would definitely recommend 👍 ### ⭐⭐⭐⭐⭐ Great product fixed my old cutter *by G***T on October 3, 2020* Great product fast shipping. On older John Deer models (403) and those like it. There is a ring where the old gear box mounted that will need to be cut out. ## Frequently Bought Together - Patco 40hp Gearbox with 1-3/8" X 6 Spline Input Shaft and 1.57" X 12 Spline Output Shaft - Stump Jumper/Flywheel 12 Splined Hub --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/129463499-patco-40hp-gearbox-with-1-3-8-x-6-spline](https://www.desertcart.tn/products/129463499-patco-40hp-gearbox-with-1-3-8-x-6-spline) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-31*