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Development of Lightweight and Compact 6-speed Manual Transmission

Article of Honda R&D Technical Review Vol.18 No.1


A high capacity 6-speed manual transmission has been developed based on the existing compact, well-established 5-speed manual transmission for 1.5-liter engines without increasing the overall length of the transmission. In order to ensure both high capacity and compactness, the synchronizer sleeve stroke of each gear has been reduced, and the specification and width for each gear was optimized. Gear noise was reduced by using a rigid, yet lightweight case shape designed using CAE analysis. The resulting 6-speed transmission has an overall length of 352 mm and total weight of 47 kg, making it light weight and compact.
In addition, a new structure was employed for the change link mechanism in order to enhance the gear-shift feel.


(1) Koyama, S., Nagai, S., Uchida, T.: Practical Examples for CAE-Based Development for Automobile Transmissions by Designers, SAE Paper, 2004-01-1726
(2) Sakaguchi, K., Saitou, K.: Development of Prediction Method for Evaluation of Transmission Case Noise Radiation Characteristics, Honda R&D Technical Review, Vol. 17, No. 1, p. 42-45
(3) Murai, A., Okazaki, K., Okuno, K.: Sporty Shifting Feel of the HONDA S2000, HONDA R&D Technical Review, Vol. 11, No.2, p. 73-78

Author (organization or company)

Kenji MATSUDA(Tochigi R&D Center)、Mitsuru MANITA(Tochigi R&D Center)、Kouji YOKOMIZO(Tochigi R&D Center)、Toru IWASAKI(Tochigi R&D Center)、Masahiro HAGINIWA(Tochigi R&D Center)

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