904657-9 – Short Couple Driveshaft – 1710 (1.938 x 6.094) Series – 12.620″ Flange To Flange

904657-9 1710 Series Short Couple Driveshaft 12.620" Flange to Flange

The 904657-9 is a 1710 series short couple driveshaft with a 12.620" flange-to-flange length and 6.620" centerline-to-centerline dimension. The 1710 series is defined by 1.938" cap diameter trunnions on a 6.094" span — the highest-torque unit in the standard SAE series hierarchy above 1610 and 1480.

Specifications

• Part Number: 904657-9
• Series: 1710 (1.938" x 6.094")
• Flange to Flange: 12.620"
• CL to CL: 6.620"

When fitting the 904657-9, measure the installed flange-to-flange gap and confirm it is 12.620". The 6.000" delta between F-to-F and CL-to-CL is consistent with standard 1710 flange yoke geometry. Confirm both end flanges are machined for 1710 series U-joint cap bores before ordering.

The 1710 series cap diameter of 1.938" is not interchangeable with 1610 (1.875") or 1480 (1.375") series hardware. The 904657-9 requires dedicated 1710 U-joints at both ends. Mixing series will result in improper cap seating and accelerated joint failure.