2-40-1031 – Stub Midship Shaft – 16 X 1.375 Splines – Butt Dia 1.844″ – Tube Dia 2.000

2-40-1031 Stub/Midship Shaft -- 16 X 1.375 Spline, " Bearing Journal

The 2-40-1031 is a precision stub shaft designed for use as a midship or carrier-bearing-supported driveshaft section. The splined section features 16 X 1.375" splines at 2.250" engagement length, and the bearing journal diameter is " -- a critical measurement for center support bearing selection.

Dimensional Specifications

Bearing Journal & Center Support Selection

The " bearing journal diameter is the key dimension for selecting a matching center support bearing (CSB). The CSB bore must match this journal within 0.001" for a press or slip fit -- consult your bearing supplier for the appropriate fit class for your application. An undersized bore will damage the journal during installation; an oversized bore will allow the bearing to spin on the shaft.

Spline Interface

This shaft uses a 16 X 1.375 spline configuration with 2.250" engagement. Ensure the mating slip yoke or companion spline matches both the count and diameter specification before assembly.

Installation as a Midship Section

This is a slip-style stub shaft (telescoping splined section absorbs driveline length changes). When assembling a two-piece driveshaft:

• Press the center support bearing onto the " journal -- use a bearing driver that contacts the inner race only.
• Mount the CSB bracket to the vehicle crossmember, checking for rubber isolator clearance.
• Align the forward and rear shaft sections so u-joint operating angles are equal and opposing.
• Torque the CSB bracket fasteners to specification and re-check alignment.