Need help? We're here!
(888) 312-8812 Login SignupFRO AUX C/S
Maintain rigid gear meshing and smooth auxiliary range power transmission with the World American Manual Transmission Countershaft. Manufactured from induction-hardened alloy steel, this auxiliary countershaft features finely finished bearing journals and gear splines that handle sustained torque without flexing. Those hardened wear surfaces reduce spline fretting and journal wear during constant range changes, allowing the rotating assembly to stay properly supported over extended service intervals. With the World American A6436 installed, the gearbox maintains stable gear engagement while minimizing vibration that can accelerate internal transmission wear.
| Taxonomy A | HD Manual Transmission |
| Taxonomy B | Shafts |
| Country of Origin (Primary) | KR |
| NAFTA Preference Criterion Code | B |
| Refurbished Part | N |
| Remanufactured Part | N |
| Warranty Special | 1 Year or 100,000 Miles |
| Warranty Special UOM | TX |
| UPC | 698231821299 |
Be the first to review this product!
Be the first to ask a question about this product!
Optional. Please do not use your full name.
Minimum 10 characters, maximum 500 characters
You can upload up to 3 images to help illustrate your question. Supported formats: JPG, PNG, GIF, WebP
Please complete the reCAPTCHA verification to submit your question.
California residents see

