Heavy Duty 1810 Series Driveshaft Center U-Joint To Center Bearing = 45.250″ – Open u-joint to Midship End Yoke, Certified Driveshaft – OEM SPICER

DSS-1810EYC45.250 OEM Spicer 1810 Series Midship Driveshaft — 45.250" CL-to-Center Bearing

The DSS-1810EYC45.250 is an OEM Spicer 1810 series certified driveshaft section configured as open U-joint to midship end yoke, with a center U-joint to center bearing dimension of 45.250 inches. This assembly serves as the front half in a two-piece driveshaft system: the open U-joint end connects at the transmission or transfer case output, and the midship end yoke terminates at the frame-mounted center support bearing. The 1810 series U-joint cap diameter is 1.875 inches — all mating yokes must be bored to this same dimension.

The 45.250-inch CL-to-CB dimension is a precise figure; the 0.250-inch increment distinguishes this part from the 45-inch variant. Measure from your front U-joint centerline to the frame bracket bearing centerline with the vehicle at static ride height and confirm you need 45.250 inches, not 45 or 45.5. An error of 0.25 inches at the center bearing translates to angular misalignment across the full length of the midship shaft, which compounds vibration at operating speed. OEM Spicer manufacture and dynamic balancing ensures this 45.250-inch assembly runs within factory vibration tolerance limits. The 1810 series is used in heavy commercial drivetrain configurations including tandem and tridem axle trucks where the 1710 series torque rating is insufficient.

Specifications

• Part Number: DSS-1810EYC45.250
• Brand: OEM Spicer
• Series: 1810
• CL to Center Bearing: 45.250"
• U-Joint Cap Diameter (1810 series): 1.875"
• Configuration: Open U-joint to Midship End Yoke
• Assembly Type: Certified Driveshaft

Fitment & Installation Notes

Measure your frame bracket centerline to open U-joint centerline distance before ordering DSS-1810EYC45.250. The quarter-inch increments in this product family matter — substituting a 44-inch or 45-inch section when 45.250 is required will position the center bearing off-axis. Confirm mating rear section series (must be 1810), center support bearing inner diameter matches the midship stub shaft OD, and all yokes use 1810 series U-joint bores (1.875" cap diameter).

At 45.250 inches, the midship section approaches lengths where critical speed becomes a more significant factor in specifying the driveshaft. The 1810 series tube diameter and wall thickness in OEM Spicer construction are chosen to maintain adequate critical speed margin for typical operating RPMs in commercial truck applications, but extended aftermarket modifications that change vehicle gearing or tire diameter should be evaluated against the driveshaft's critical speed rating.

When installing DSS-1810EYC45.250, verify yoke ear phasing (in-phase assembly at both U-joint ends unless specified otherwise) and confirm the center support bearing bracket mounting hardware is torqued to specification. Misalignment at the center bearing bracket — even a small angular offset — will accelerate bearing wear and is a common source of driveline vibration misdiagnosis.

Explore related Certified Driveshaft assemblies including 1810 series rear sections across multiple lengths.