Development of a New Heavy-Duty Automatic Transmission Fluid C-4 Specification

Paper #:
  • 892160

Published:
  • 1989-09-01
Citation:
de la Flor, F. and Palmer, W., "Development of a New Heavy-Duty Automatic Transmission Fluid C-4 Specification," SAE Technical Paper 892160, 1989, https://doi.org/10.4271/892160.
Pages:
14
Abstract:
Allison Transmission Division of General Motor Corporation has developed a new high performance heavy-duty automatic transmission specification. The new Allison C-4 specification has been designed to meet higher ATD customer expectations and replace the 12-year-old Type C-3. The new C-4 specification includes a higher temperature, more severe oxidation requirement and a new non-asbestos clutch friction test. It also incorporates a fluoroel-astomer seal compatibility test and more demanding anti-foam and anti-copper-corrosion requirements.
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