90-28-27 Tube Weld Yoke SPL90 Fits TubeL 4.000×0.134 Butt Dia: 3.734

Part Number

90-28-27

Series

SPL90

Material

Steel

Butt Diameter

3.734"

C/U-joint to Weld

2.969"

Tube Dia x Wall

4.000 x 0.134"

SPL90 sits well above the 1710 series in the Spicer/Dana strength hierarchy -- the larger trunnion and cap assembly is designed for heavy truck, bus, and severe-duty equipment drivelines. The 4.000" tube OD with 0.134" wall is a substantial steel section; verify the MIG or submerged-arc weld process is qualified for this wall thickness to ensure full penetration. Incomplete fusion at the yoke-to-tube weld interface is a fatigue failure initiation site that typically manifests as a catastrophic separation under high-torque shock loading. After welding, the assembly must be dynamically balanced at the expected operating RPM -- static balance alone is insufficient for high-speed SPL90 shafts. Pair with an SPL90 weld yoke at the differential end for a matched-series assembly.