Design in D404 Axle Models Owner's manual

Spicer

Axles & Brakes

BIB-0105

Information Bulletin

Bulletin Type: Parts/Service Information

Topic: New Welded Shift Fork Design in D404 Axle Models

Affected Models: D344, D404-(P), D405-(P), D454-(P), DSH40-(P), DSH44-(P)

In February 2000, a new welded shift fork and push rod assembly was designed and introduced into the models listed

above. The new welded shift fork assembly (P/N: 129856) requires the use of a longer spring (P/N: 129859). Because

the longer spring is required when using the new shift fork assembly, they are being sold together as a kit (P/N: 510870).

The old push rod and snap ring assembly (P/N: 129583) is no longer available; if replacing this particular part you should

update to the new replacement parts. The old design shift fork remains available for servicing earlier built models.

NOTE: DUE TO THE INHERENT DESIGN OF THE NEW WELDED SHIFT FORK ASSEMBLY 129856

(SERVICE KIT: 510870) THE PART IS NOT INTERCHANGEABLE WITH THE OLDER DESIGN

PARTS. 129856 WILL NOT WORK ON MODELS BUILT WITH POWER DIVIDER COVER STAMPED

“127605”. YOU MUST USE THE ORIGINAL DESIGN REPLACEMENT PARTS ON THOSE EARLY

MODELS. REFER TO THE CHARTS ON PAGE 2.

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Spicer® Axles & Brakes ABIB-0105 Information Bulletin Bulletin Type: Parts/Service Information Topic: New Welded Shift Fork Design in D404 Axle Models Affected Models: D344, D404-(P), D405-(P), D454-(P), DSH40-(P), DSH44-(P) In February 2000, a new welded shift fork and push rod assembly was designed and introduced into the models listed above. The new welded shift fork assembly (P/N: 129856) requires the use of a longer spring (P/N: 129859).
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Shown below in Chart-1 is the past history on D404 shift fork components for straight air lockout configurations. The reverse air lockout parts for the D404 family axles are unique in their design as shown in Chart-2. In August and September 1996, Navistar stopped using the “Reverse Air Lockout” option on D404 family axles used in their production vehicles.