Differential, Driving Axle

Sources Sought Notice: 2023-SPRDL123R0102

Item Name: Differential, Driving Axle

NSN:  2520-01-574-4828

Part Numbers:
- 2011412-1; CAGE 63ZH0; DANA LIGHT AXLE MANUFACTURING LLC
- 6048217; CAGE 34623; AM GENERAL LLC

3-year Indefinite Delivery/Indefinite Quantity (IDIQ) Contract

Minimum 3-year Buy Quantity: 33/each

Maximum 3-year Buy Quantity: 546/each

End Item: High Mobility Multi-Wheeled Vehicle (HMMWV)

RESPONSE DATE:  17 April 2023

REQUIREMENTS DESCRIPTION:
This driving axle differential is used on the HMMWV. The rear differential connects to the transfer case or transmission via the driveshaft and allows the engine to transfer power to the HMMWV's rear wheels. The differential distributes equal amounts of torque to both wheels. This permits the wheels to react to resistance or provide traction for vehicle turns. NSN 2520-01-574-4828 is for the rear differential used in the HMMWV with a serial number of 300,000 or greater. HMMWVs with a 300,000 or greater serial number are also referred to as a Revision B model (Rev B). This designation is indicative of reliability improvements that were implemented into the HMMWV during production to restore some reliability and performance to the vehicle through automotive improvements. In this case, The Revision B rear differential is cooled by water provided from the engine coolant system, whereas older models were cooled with oil or not cooled at all. The reason that this water-cooled variant provides an improvement over previous iterations is that the cooling system was tied into the vehicle radiator/fan system which allows for greater heat rejection and prevents thermal soak of the cooling fluid. The improvements realized in this variation of the HMMWV differential have improved the vehicle reliability by lowering the operational temperatures of the differential fluid in the driving axle differential which has a direct impact on the longevity of the component.

While there is a Government drawing for the rear differential, the drawing is not fully defined and does not include vendor-developed components that are considered the intellectual property of the developer. As such, the Government does not have the technical data package (TDP), detailed drawings, or performance specifications for these items. No attachments or links have been added to this opportunity.

PLEASE NOTE:

• This notice is NOT an open solicitation (i.e. Invitation for Bid or Request for Proposal).
• Qualification testing and evaluation IS required to become an approved source.
• Source approval does NOT guarantee business.
• Qualifying as an approved source ONLY provides the opportunity to compete on future solicitations.

Additional Information:

*Source Approval Program:  https://www.tacom.army.mil/cmo/sap.html

*Source Approval Program – What is it?:  https://www.tacom.army.mil/cmo/sap_what.html

*Source Approval Request (SAR) Package Requirements:  https://www.tacom.army.mil/cmo/sap_sar.html

Point of Contact:
Title: Source Approval Officer
Email: usarmy.detroit.tacom.mbx.lcmc-market-surveys@mail.mil