904657-5 – Short Couple Driveshaft – 1710 (1.938 x 6.094) Series – 11.620″ Flange To Flange

904657-5 Short Couple Driveshaft — 1710 Series, 11.620" Flange to Flange, 6.620" CL to CL

The 904657-5 is a 1710 Series short-couple driveshaft assembly with a flange-to-flange dimension of 11.620" and a centerline-to-centerline U-joint distance of 6.620". The 1710 Series is rated for heavy commercial vehicle torque loads, using 1.938" cap diameter U-joints with a 6.094" cross width. This assembly is used as an interaxle shaft in Class 7–8 tandem-drive trucks and in other flanged short-couple applications where the companion flange gap measures 11.620". The 904657-5 is dynamically balanced prior to shipment.

Within the 904657 stepped-length family, the 904657-5 at 11.620" F-to-F sits 0.760" shorter than the 904657-9 (12.620") and shares the same 6.620" CL-to-CL as the -9 variant. This indicates both assemblies use the same yoke body length — the difference between -5 and -9 variants at the same CL-to-CL is in the tube or slip section length. This is relevant when diagnosing vehicle vibration: if a replacement shaft is installed with the wrong F-to-F dimension, the U-joint operating angle will differ from the original design intent even if the CL-to-CL appears similar.

Specifications

• Part Number: 904657-5
• Series: 1710 (1.938" cap x 6.094" width)
• Flange to Flange: 11.620"
• CL to CL: 6.620"
• Application: Heavy-duty commercial truck tandem axle, interaxle shaft

Fitment & Installation Notes

Measure the flange-to-flange gap in the vehicle at operating chassis height before ordering the 904657-5. The difference between this assembly (11.620") and the next variant (904657-9 at 12.620") is 1.000" — an error of this magnitude in shaft length selection will introduce significant operating angle offset at both U-joints, resulting in vibration and accelerated U-joint wear. The 1710 Series companion flanges must be verified for bolt circle, pilot diameter, and number of bolt holes per the axle manufacturer's specifications.

The 1710 Series torque capacity positions this assembly for Class 7–8 trucks in tandem or single-drive axle configurations operating at GVW ratings up to 80,000 lb. The 1.938" U-joint cap is larger than the 1610 Series (1.875") and the yoke bores are machined accordingly — 1610 Series U-joints cannot be installed in 1710 yoke ears due to the larger bore diameter. Short-couple driveshaft selection must always begin with a physical measurement of the installation gap, not estimation from dimensional tables.

The 904657-5 is one length variant in the stepped 904657 family of 1710 Series short-couple interaxle shafts. Compare the physical measurement of the old shaft or the chassis gap directly against the 11.620" flange-to-flange specification before ordering. Explore related Short Couple Driveshaft assemblies including adjacent 1710 Series variants at 10.620", 11.380", 12.380", 12.620", and 13.380" for matching other interaxle distances.