Patent ID: 7098173

Claim:
An automatic transmission comprising a housing defining a lubricant sump, wherein the lubricant sump contains a lubricating oil composition comprising: a) a lubricating oil; b) an antiwear agent; and c) an antifoam composition comprising a perfluoropolyether compound, wherein the perfluoropolyether compound comprises a perfluoroether repeating unit selected from the group consisting of —C a F 2a O— repeating units, wherein a is from 1 to 2 or 4 to 10: —(CF 2 —CF 2 —CF 2 —O)—; —(CF 2 —CF 2 —O)—; and —(C b F 2b O)— and —(CF 2 —O)—, wherein b is 2–10.