UPDATED RELIABILITY EVALUATION OF V730 TRANSMISSION

The Detroit Diesel Allison V730 automatic, 3-speed transit bus transmission has had a generally unfavorable performance since its introduction in 1976. A preliminary study by TSC of problems encountered and the effectiveness of corrective measures was described in a 1982 UMTA Technology Sharing report. Since then, a reasonable amount of operating time has been accumulated on units incorporating a number of corrective design modifications. Data indicates a general and significant improvement in reliability. Southern California Rapid Transit District has data showing a high proportion of the transmissions yet have to sustain their first failure even after an average of 75,000 miles. This is in contrast to the premature onset of failures in the early transmissions discussed in the 1982 report. The extended data and the analysis are included.

• Corporate Authors:

  Transportation Systems Center

  Operations Assistance Division, 55 Broadway
  Cambridge, MA  United States  02142

  Urban Mass Transportation Administration

  Office of Technical Assistance & Safety, 400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Seekell, F
• Publication Date: 1983-7

Media Info

• Features: Figures; Tables;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Buses; Design; Hydraulic transmissions; Performance evaluations; Reliability; Statistics; Transmissions; Vehicle design
• Uncontrolled Terms: Design criteria
• Old TRIS Terms: Bus design
• Subject Areas: Data and Information Technology; Design; Highways; Public Transportation; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00380185
• Record Type: Publication
• Report/Paper Numbers: DOT-TSC-UMTA-83-33
• Files: TRIS, USDOT
• Created Date: Dec 30 1983 12:00AM