Finding the right PTO yoke assembly is essential for reliable power transfer between your tractor and attached implements. This guide focuses on durable tube yokes and U-joint compatible parts that fit common 1/4″ keyways and standard PTO shafts. The top picks below are suited for different buyers: farmers needing quick replacements, DIYers wiring up a post-hole digger, and workshop technicians assembling common PTO drives. Each product section identifies who it’s best for and why it stands out, along with a practical caution when relevant.
| Product | Brand | Best For |
|---|---|---|
| Mkekexe 7N Series PTO Tube Yoke (Yellow) | Mkekexe | Farmers needing a high-strength, high-wear resistance yoke for 35x94mm U-joint sizes |
| Replacement PTO Yoke and U-Joint for Comer Series 4 Post Hole Digger | Generic | Direct replacement for Comer 23-005K systems; complete kit for quick fixes |
| Mkekexe 7N Series PTO Tube Yoke (Black) | Mkekexe | Alternative color option for same spec yoke needs; durability intact |
| Keyed PTO Shaft Yoke – U-Joint Size 31/32″ x 2-9/32″ | Sparex | OEM-style fitment with standard bore and keyway for easy install |
| Transmission Slip Yoke 1310 Series & U-Joint Kit | vierzweites | Broader slip yoke kit for GM/TH/Turbo transmissions and common drivetrains |
Mkekexe 7N Series PTO Tube Yoke Yellow — 35x94mm U-Joint
The Mkekexe 7N Series PTO Tube Yoke is designed for robust farm and implement connections. It features a U-joint size of 35 x 94mm and a 54mm triangle tube fit. Height is 106mm with an inner slide of 68mm, offering solid engagement across common PTO configurations. The yoke is forged from high-strength alloy steel and heat-treated to improve hardness and wear resistance, helping it endure wear and impact in demanding field conditions.
Best for: Farmers or contractors who require a strong, long-lasting yoke for 7N-series PTO systems. The high-hardness material choice makes it suitable where lubricated, heavy-use environments are expected. The included interchange part numbers (204176851 and 700-6754 family) help with cross-reference and compatibility checks.
Caution: Ensure correct yoke size and triangle tube specification before ordering, as mismatches can reduce joint life or cause misalignment during operation.
Replacement PTO Yoke and U-Joint for Comer Series 4 Post Hole Digger
This kit is a direct replacement for Comer Series 4 Post Hole Digger PTO systems (part number 23-005K). It includes both the yoke and the U-joint components with retaining clips, providing a complete replacement solution. The shaft diameter is a standard 1 1/4 inch, matching common PTO connections on tractors and implements.
Best for: Home workshop users who need a ready-to-install, all-in-one replacement for a Comer 4-post hole digger drivetrain. The kit’s completeness reduces downtime and simplifies ordering. It is especially helpful when the original parts are no longer available as separate components.
Limitation: The kit is designed for Comer 4 Post Hole Digger systems; verify compatibility with your specific model to avoid fit issues.
Mkekexe 7N Series PTO Tube Yoke Black — 35x94mm
The Black version of the 7N Series PTO Tube Yoke shares the same core specifications as the yellow variant. It offers the same U-joint size of 35 x 94mm, a 54mm triangle tube, and a 106mm overall height with a 68mm inner slide. The same high-strength alloy steel and heat-treatment process provide comparable durability and wear resistance for heavy-duty field use.
Best for: Users who prefer a darker hardware color to match existing equipment or who want identical performance with a different aesthetic. This is a practical alternative when color coordination matters for maintenance logs or fleet branding.
Caution: Color choice does not affect performance; ensure the size and interchange numbers align with your current PTO setup.
Keyed PTO Shaft Yoke – U-Joint Size 31/32″ x 2-9/32″
The Sparex keyed PTO shaft yoke is built to OEM specs to provide a direct fitment and easy installation. It features a 1-1/4 inch bore with a 1/4 inch keyway, enabling reliable alignment and torque transfer in standard PTO drives. High-grade materials support longevity in demanding applications.
Best for: Shops or farmers who need an accurate OEM-style replacement with a simple install process. The keyed bore helps ensure consistent engagement and reduces slip in high-torque scenarios.
Limitation: Verify the keyway dimensions and bore size against your original yoke to avoid misfitment.
Transmission Slip Yoke 1310 Series & U-Joint Kit
This slip yoke kit is designed for the 1310 series and includes U-joint components to connect drive shafts to transmissions like GM TH, Turbo Hydromatic, Turbo 350, and similar configurations. The kit supports spline types of 26 or 27, with a slip yoke length of 5.469 inches and a yoke diameter around 3.469 inches. It aims to reduce vibration and improve driving stability through proper power transmission alignment.
Best for: Technicians or DIYers dealing with older GM-style drives or mixed drivetrain configurations that require a compatible slip yoke and U-joint kit. The 1310-series compatibility helps cover common light-to-mid-duty applications.
Limitation: Always confirm spline compatibility (26 vs 27) and overall dimensions with your existing drive shaft before purchase.
Buying Guide: PTO Yokes And U-Joints — Key Considerations
Choosing the right PTO yoke and U-joint involves matching size, shaft type, and compatibility with your tractor and implements. Below are practical considerations to help you select confidently.
What size is your PTO yoke?
Common yoke sizes include 35 x 94mm (as shown in several Mkekexe options) and 1 1/4 inch bore with various U-joint heads. Confirm the U-joint size (diameter and width) and the triangle tube dimension to ensure a proper fit with your PTO shaft and the implement’s yoke.
Is it a complete replacement kit or a single yoke?
Some products offer complete assemblies with U-joints and retaining clips, while others are single yokes requiring separate joints. If you’re replacing a worn assembly, a complete kit can reduce downtime and ensure correct alignment.
OEM vs aftermarket fitment
OEM-spec parts are designed to fit like the original; aftermarket options may offer broader availability or color variants. Check part numbers and cross-reference interchange numbers to avoid incompatibilities.
Material and heat treatment
High-strength alloy steel and heat-treating improve hardness, wear resistance, and longevity under heavy loads. If your operation involves frequent PTO engagement or rough terrain, prioritize hardened alloys.
Key features to compare
- U-joint size and bore dimensions
- Triangle tube compatibility
- Overall height and inner slide length
- Material quality and heat treatment
- Included components (retaining clips, bearings, etc.)
Common cautions
- Match all measurements with your current shaft to prevent misfitment and potential safety hazards.
- Verify compatibility with your specific tractor model and implement connection standards.
- Avoid mismatched color codes as a sole indicator of compatibility; use part numbers and dimensions.
FAQ
- Q: How do I know if a PTO yoke will fit my tractor?
- A: Check the U-joint size, bore diameter, keyway type, and the triangle or spline compatibility with your PTO shaft and implement.
- Q: Can I replace only the U-joint or do I need a full yoke?
- A: If the yoke is undamaged and the U-joint is worn, replacing just the U-joint may suffice. If the yoke is worn or bent, replace the entire assembly.
- Q: Are all 1 1/4 inch PTO parts interchangeable?
- A: Not necessarily. While many are standardized, verify the exact spline count, bore, and keyway for compatibility.
- Q: What indicates wear on a PTO U-joint?
- A: Symptoms include unusual vibration, clunking sounds, or visible play in the joint during operation. Replace worn parts promptly to prevent drivetrain damage.
- Q: Do I need retaining clips with every kit?
- A: Most complete kits include retaining clips, but some single-yoke products require you to source clips separately.