2-28-397 Weld Tube Yoke 1310 Ser’ , Fits 3.500 x 0.065 Tube , Butt Dia: 3.375 , Centerline To Weld 1.688 Inch

Q: What is the advantage of 0.065" wall vs 0.083" on a 3.5" tube? A: The 0.065" wall reduces tube weight by about 21% versus 0.083" at the same OD, which slightly raises the critical speed (the shaft mass decreases while the section modulus decreases by less). For high-RPM applications where critical speed is the binding constraint, the thinner wall may be preferred. Q: What is the torsional buckling risk? A: The D/t ratio of 53.8 for 3.500" x 0.065" is in a moderate-risk zone. For peak torque below 1,000 ft-lb this is generally acceptable in steel; above that, verify with a buckling calculation. Q: Is 2-28-397 the same as a Spicer part? A: The 2-28-397 numbering follows the Spicer catalog convention. Cross-reference with the Dana/Spicer weld yoke catalog under the 3.500" tube section for exact OEM vehicle fitments. Q: Where does this yoke fit in the drivetrain? A: This weld yoke is typically used at the transmission-end or axle-end of a light-truck or performance rear driveshaft where a 3.5" tube and 1310-series U-joint are specified. Butt dia 3.375" locates inside the tube ID.