Spicer Single Drive Axles Service Manual: 34DS, 34RS, 38DS, 38RS, DS340, RS340, DS380, RS380, DS400, RS400, DS3 - Manual (Page 91)

Appendix
88
Ser
vice Procedure
Service Bulletin Supplement
Input Shaft End Play for Axle Models equipped with an Input Shaft Axial Spring and Thrust
Button.
In September 1988, an Axial Spring and Thrust Button were added between the input and output shafts. The addition of these parts
reduces shaft end play movement by loading the shafts axially in the direction of the yoke.
Location of Axial Spring and Thrust Button.
End play tolerances are the same for axles with or without the new Spring and Thrust Button. However, end play measurement
procedure is different as described below.
Input Shaft End Play:
New or Rebuild with new parts 0.003” to 0.007”
Rebuild with reused parts 0.013” to 0.017”
Note: Because of manufacturing variations in individual parts, correctly adjusted end play could vary 0.010,” after the unit is ro-
tated.
Acceptable End Play Tolerances when measuring as a regular maintenance procedure with axle in truck.
Up to 0.060” with over 100,000 miles or 1 year service off-road
Up to 0.040” with less than 100,000 miles or 1 year service on-road
Note: If end play exceeds limits, disassemble power divider and replace worn parts.