Spicer NEW REDESIGNED 40K TANDEM CARRIERS User Manual
Spicer For the car
Page 1 of 6
Bulletin: ABIB-0801R1
Date: October 22, 2010
Bulletin Type: Service
Topic: NEW REDESIGNED 40K TANDEM CARRIERS
____________________________________________________________
Affected Models:
All D344, 404, 405, DST40, 41, DSP40, 41, DSH40, DSH44
(includes Diff Lock and Pump option models)
Issue Description:
Dana has engineered in a significant product upgrade to the current 40K tandem axles. At the core of
these product enhancements is the incorporation of Dana’s patented and proven OnDemand™ lube
pump. This innovative lubrication system operates primarily during spinout situations. The remaining
99+% of the time, the pump is idle and ready to be activated instantaneously, in forward or reverse.
When compared to competitive axles that continuously operate a lube pump, this efficiency upgrade
saves up to 2HP and also decreases oil sump temperature by as much as 20°F. The wasted HP incurred
by the other axles relates directly to reduced fuel economy, higher temperatures in the lube sump, and
reduced lubricant life. The new design carriers have been optimally designed such that there is now a
12lbs weight savings on pump carriers and 5lbs for the non-pump models. This same system is currently
used in the D170 and D190 family of heavy duty tandems.
SERVICE PARTS IMPACT: Production of the new design units in North America begins June 16, 2008.
These design upgrades will impact customers who stock parts or service carriers for the models listed
above.
Service Carriers are completely interchangeable as units.
Individual internal parts and kits
are not interchangeable! It is important for customers to beware of the part number changes and in
time begin making stocking adjustments accordingly.
The material contained in this bulletin is product improvement information. Dana Corporation
is not
committed to, or liable for, canvassing existing products.
Dana OnDemand™ lube
pump now available in 40K
tandem carriers
Lube pump located inside
new output shaft side gear
New Input Shaft
for Lube pump