904657-4 – Short Couple Driveshaft – 1710 (1.938 x 6.094) Series – 11.380″ Flange To Flange

904657-4 Short Couple Driveshaft — 1710 Series, 11.380" Flange to Flange, 7.380" CL to CL

The 904657-4 is a 1710 Series short-couple driveshaft assembly with a flange-to-flange measurement of 11.380" and a centerline-to-centerline U-joint distance of 7.380". The 1710 Series employs 1.938" cap diameter U-joints at a 6.094" cross width — positioned above the 1610 and below the SPL commercial series in torque capacity — and is the industry standard for Class 7–8 tandem-axle commercial truck interaxle (jackshaft) applications. Factory balanced prior to shipment.

The 904657-4 at 11.380" F-to-F and 7.380" CL-to-CL represents a specific combination of yoke body depth and assembly tube length. Note that the 904657-8 also has a 7.380" CL-to-CL but a longer F-to-F of 12.380" — the 1.000" F-to-F difference between these two variants indicates different yoke body lengths or flange configurations while maintaining the same U-joint cross spacing. Understanding this distinction is important when the old shaft is unavailable for direct measurement and only the CL-to-CL dimension can be obtained from vehicle data.

Specifications

• Part Number: 904657-4
• Series: 1710 (1.938" cap x 6.094" width)
• Flange to Flange: 11.380"
• CL to CL: 7.380"
• Application: Heavy-duty commercial truck tandem axle, interaxle shaft

Fitment & Installation Notes

Measure the distance between companion flange faces in the vehicle at ride height before ordering the 904657-4. Short-couple driveshafts have no slip range — the 11.380" F-to-F is the installed dimension, and the companion flange faces must be separated by this distance within the assembly's installation tolerance. If the vehicle has been through a chassis rebuild or frame repair, remeasure the tandem axle spacing as it may no longer match the original specification. Confirm the 1710 Series companion flange bolt circle, pilot diameter, and bolt torque per the axle OEM service documentation.

The 1710 Series U-joint cap (1.938") requires 1710-rated yokes and companion flanges. Installing a 1610 Series U-joint (1.875" cap) into 1710-bored yoke ears creates 0.063" of radial clearance at the cap, causing fretting, cap rotation, and rapid failure. The 904657-4 is suited for tandem-drive trucks where the interaxle distance produces a 11.380" flange-to-flange gap. This is a common length range for certain axle-to-axle configurations on Class 7–8 vehicles with 40" tandem spacing.

The 904657-4 is one variant in the stepped 904657 1710 Series interaxle shaft family. All variants use the same 1710 Series flange yoke and U-joint specification — selection is based solely on the measured flange-to-flange gap. Cross-reference the 11.380" F-to-F dimension against the vehicle chassis specification drawing or the removed shaft measurement to confirm selection. Explore related Short Couple Driveshaft assemblies including the full 904657 1710 Series range and 906020 CL-to-CL variants for tandem axle applications.