Some interaxle shafts (the driveshaft connecting 2 drive axles) utilise special phasing

Bulletin number

IK0600001

Component

Power train

Summary

Some interaxle shafts (the driveshaft connecting 2 drive axles) utilise special phasing. This is by design to reduce torsional vibrations. See Dana/Spicer letter here & Meritor here. Dana DS404 rear axle housing families use offset interaxle driveshaft phasing to reduce torsional vibrations. Depending on the interaxle driveshaft series, the phasing will be different. Vehicles built with 0417LTFXXXX drivelines until 03/23/2009 use 32 degree phasing, while vehicles built with 0417LTGXXXX drivelines from 3/12/2009 to current use 48 degree phasing. There is an overlap of 11 days where either shaft could have been used.

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