3-53-1791 Splined Midship Tube Shaft Splines: 1.500 x 10 , Fits: 3.500 X .083 Tube, Weld to End: 3.875

3-53-1791 Dana Spicer Splined Midship Tube Shaft — 1.500" x 10 Splines, Fits 3.500" x 0.083" Tube

The 3-53-1791 is a Dana Spicer splined midship stub shaft used in two-piece driveshaft assemblies. It serves as the intermediate shaft that passes through the center support bearing and connects the front driveshaft section to the rear section via U-joints. The splined end — 10 splines at 1.500" diameter — engages a mating slip yoke or splined housing, while the weld end is designed for permanent attachment to a 3.500" O.D. x 0.083" wall thickness driveshaft tube. The bearing journal on this stub shaft measures 1.574" in diameter, which must match the inner bore of the center support bearing used in the assembly.

The butt diameter of 3.344" is the outer diameter of the shaft at the weld joint where it meets the tube. This dimension is critical for centering the shaft within the tube bore — a butt diameter that undercuts the tube bore will cause off-center welds and assembly imbalance. The end-to-weld dimension of 3.875" is the distance from the splined end of the shaft to the weld point on the tube, establishing the shaft's engagement depth. The spline length of 1.812" represents the axial engagement length of the 10-spline profile. This stub shaft is catalogued for use with 1310 through 1480 Series driveshaft assemblies.

Specifications

• Part Number: 3-53-1791
• Brand: UDS / Dana Spicer
• Style: Fixed (non-telescoping)
• Splines: 10 splines x 1.500" diameter
• Spline Length: 1.812"
• Tube Diameter: 3.500"
• Tube Wall Thickness: 0.083"
• Butt Diameter: 3.344"
• End to Weld: 3.875"
• Bearing Journal Diameter: 1.574"
• Compatible Series: 1310–1480

Fitment & Installation Notes

Before welding the 3-53-1791 into a tube, confirm the driveshaft tube is exactly 3.500" O.D. with 0.083" wall thickness. A tube with the same O.D. but a different wall (e.g., 0.120") will have a smaller inner bore, and the butt diameter of 3.344" may not seat properly. Measure the tube I.D. (3.500" O.D. minus 2 × 0.083" wall = 3.334" I.D.) and verify the butt diameter seats concentrically. The center support bearing used with this shaft must have an inner bore matching the 1.574" bearing journal — a bearing with even 0.5mm larger bore will allow radial play that generates vibration at operating speed.

The fixed style designation means this is not a slip-type midship shaft — there is no telescoping capability at the spline end. The 10-spline x 1.500" profile engages a fixed-position connection. The 3-53-1791 is rated for use with 1310 through 1480 Series U-joints, covering light-duty and medium-duty commercial vehicle applications. Welding should be performed with the shaft centered in the tube — use a lathe or dedicated weld fixture to maintain concentricity before tacking. After welding, the assembly requires dynamic balancing before installation.

The 3-53-1791 is a Dana Spicer catalogued midship stub shaft available through multiple drivetrain suppliers including Summit Racing, Driveshaft World, and Mako Driveshafts. When sourcing a replacement, confirm all three critical dimensions: bearing journal O.D. (1.574"), spline count and diameter (10 x 1.500"), and tube compatibility (3.500" x 0.083"). Explore related Stub and Midship Shaft components including other spline configurations and center support bearings for two-piece driveshaft builds.