Manual transmission developments

This paper presents the background of heavy truck manual transmissions, in particular, the roadranger twin countershaft range. The selection of transmission to engine and the use of road speed governor is reviewed for performance and economy. Noise regulations have forced manufacturers to look at new gear design to ensure transmission noise is a minor noise source. The development of multi contact gear mesh has enabled noise regulations to be met and has improved efficiency and capacity of transmissions. This paper describes the concept and development of a self engaging mechanical transmission which makes shifting easier for the driver and protects transmission from driver abuse (a).


  • English

Media Info

  • Pagination: 16P
  • Monograph Title: Diesel engine lubrication

Subject/Index Terms

Filing Info

  • Accession Number: 01438413
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 9:32PM