3540-244 – Stub & Midship Shaft – 23/24 X 1.562 Splines – Butt Dia 3.344″ – Tube Dia Wall 3.500X0.083

The 3540-244 midshaft stub is the center section of a two-piece driveshaft — it carries the center support bearing and bridges the front and rear shaft assemblies. Spline count, spline diameter, and butt diameter are all spec-specific. The 3540-244 midshaft stub won't fit a different tube OD or a different output shaft spline, and substituting a close-but-not-exact part will produce vibration that traces directly back to this component.

3540-244 Midshaft Stub — Spline & Tube Dimensions

The 3540-244 midshaft stub specs: 23/24 X 1.562 spline | 3.350" spline length | 3.344" butt dia | 8.000" end-to-weld | fits 3.500 tube. optional to use with: 3503-241 / 5503-241 /S3-3-7021x / 4103-241 / 3-3-7001. The butt diameter determines how the stub seats in the driveshaft tube — too loose and the weld joint runs off-center. Spline length determines engagement depth on the output shaft; short engagement under high torque loads damages the shaft splines before the stub shows any sign of wear.

When replacing a midshaft stub, measure both the tube ID and the output shaft spline count before ordering. Check runout on the new 3540-244 midshaft stub before welding — a stub with more than 0.005" runout will never balance correctly regardless of how many weights you add.

Key Features

• Spline: 23/24 X 1.562 — verify against output shaft
• Spline length: 3.350" — full engagement required under load
• Butt dia: 3.344" — must seat concentrically in driveshaft tube
• End-to-weld: 8.000" — factors into total shaft length
• Tube fit: 3.500 — designed for this tube specification
• Brand: UDS
• Note: optional to use with: 3503-241 / 5503-241 /S3-3-7021x / 4103-241 / 3-3-7001

Specifications

• SKU: 3540-244
• Brand: UDS
• Spline: 23/24 X 1.562
• Spline Length: 3.350"
• Butt Dia: 3.344"
• End to Weld: 8.000"
• Tube Fit: 3.500
• Notes: optional to use with: 3503-241 / 5503-241 /S3-3-7021x / 4103-241 / 3-3-7001