Clutch ISK1.375 Upgraded Input Shaft for NV4500 Transmission

Features:

• Fits NV4500 transmission only
• Upgraded 1.375-inch input shaft
• Stronger than factory input shaft
• Ideal for high-torque clutch applications
• Improves durability under heavy loads
• Compatible with South Bend clutch kits
• Recommended for performance or towing builds

Premium Input Shaft for NV4500 Transmission

If you’re building serious power into your NV4500-equipped Dodge Ram and want that transmission to hold up under the pressure, the South Bend Clutch Upgraded Input Shaft is an upgrade you don’t want to skip. Designed specifically for 1994–2004 Dodge Ram 2500, 3500, and 4500 models running the NV4500, this heavy-duty 1.375-inch input shaft gives you the strength and peace of mind the stock shaft just can’t offer—especially when you’re running a high-torque clutch or doing serious towing. The factory input shaft was never designed to handle the demands of modern power upgrades. Once you start pushing past stock torque levels with upgraded tuning, big turbos, or dual-disc clutches, it becomes one of the weak links in the system. That’s where this South Bend upgrade comes in. With its increased diameter and improved material strength, it’s built to handle aggressive launches, heavy trailers, and the kind of abuse that comes with making real power.

Straightforward Install

This shaft is a perfect fit for the NV4500 and is compatible with South Bend’s heavy-duty clutch kits. It’s ideal for trucks used in high-stress environments—whether that’s hauling equipment, pulling fifth wheels, or launching off the line with boosted torque. It installs just like stock, but delivers a serious bump in strength where it matters most. If you’ve already got the transmission out or you’re planning a clutch upgrade, this is one of those “do it once, do it right” parts. You don’t want to go through the labor twice because the factory shaft couldn’t take the heat. With South Bend’s reputation for performance and reliability, this input shaft makes sure your NV4500 is up to the job—no matter how hard you push it.

Fits: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Dodge Ram 2500/3500/4500