Heavy Duty 1810 Series Driveshaft Center U-Joint To Center Bearing = 40″ – Open u-joint to Midship End Yoke, Certified Driveshaft – OEM SPICER

DSS-1810EYC40 OEM Spicer 1810 Series Midship Driveshaft — 40" CL-to-Center Bearing

The DSS-1810EYC40 is an OEM Spicer 1810 series certified driveshaft section in an open U-joint to midship end yoke configuration, with a center U-joint to center bearing dimension of 40 inches. This assembly forms the front section of a two-piece driveshaft system, with the open U-joint end connecting at the transmission or transfer case output and the midship end yoke terminating at the frame-mounted center support bearing. All 1810 series components use a 1.875-inch U-joint cap diameter — this bore dimension must match every mating yoke and U-joint in the system.

The 40-inch CL-to-CB measurement is the distance from the open U-joint centerline to the centerline of the midship support bearing. This measurement must align precisely with the frame crossmember bearing bracket. A center support bearing that is even 0.5 inches off-axis from the driveshaft centerline will generate vibration and destroy the bearing housing. OEM Spicer Certified construction ensures this assembly is dynamically balanced to factory spec at full length. The 1810 series is Spicer's standard heavy commercial rating — positioned above the 1710 series in the torque capacity hierarchy and common in Class 6–7 truck and heavy vocational applications.

Specifications

• Part Number: DSS-1810EYC40
• Brand: OEM Spicer
• Series: 1810
• CL to Center Bearing: 40"
• U-Joint Cap Diameter (1810 series): 1.875"
• Configuration: Open U-joint to Midship End Yoke
• Assembly Type: Certified Driveshaft

Fitment & Installation Notes

Before ordering DSS-1810EYC40, measure the distance from your front U-joint centerline to the frame bracket centerline at static ride height. This must be 40 inches. Verify all mating yokes are 1810 series with 1.875-inch cap bores — a 1710 yoke (1.938" bore) will allow cap slop that causes catastrophic U-joint failure. The midship stub shaft must match the center support bearing inner diameter exactly.

The 40-inch and 41-inch versions (DSS-1810EYC40 and DSS-1810EYC41) are distinct parts — a 1-inch difference in CL-to-CB dimension will result in the bearing bracket sitting offset from the bearing centerline. Do not substitute one for the other without confirming the frame bracket location. Both lengths are for similar truck applications, but the frame geometry varies by manufacturer and model year.

Yoke phasing at both U-joint ends must be in phase unless vehicle geometry specifies otherwise. The center support bearing mounting hardware must be torqued to specification, and the bearing housing must seat flat against the frame bracket without angular preload. Confirm rear driveshaft section series and length before completing the installation of DSS-1810EYC40.

Explore related Certified Driveshaft assemblies including matching 1810 series rear sections and center support bearings.