Abstract: A method for forming a transmission synchronizer friction surface includes the steps of forming a woven substrate fabric, oxidizing the substrate fabric, carbonizing the substrate fabric, densifying the carbonized substrate fabric, burnishing the densified carbonized substrate fabric, applying a thermoset adhesive to the burnished substrate fabric, and heating and pressing the piece of fabric against a conical surface of a synchronizer element. To form the fabric, yarn is formed of chopped substrate fibers, and the yarn is woven to form the woven substrate fabric. Densification is increased by extending a period of time of chemical vapor deposition to achieve a weight in an unburnished condition of at least 16 ounces per square yard for a thickness range of approximately 40 to 50 mils. Both sides of the substrate fabric are burnished. The material is pressed against the conical surface under a high pressure of at least 2000 psi to achieve the desired bonding of the substrate fabric to the conical surface.

Abstract: A pneumatic control system for a range type compound transmission is provided including a first actuator valve that selectively connects a first range cylinder chamber to a pneumatic source when a high range shift is requested by the vehicle operator, and a second valve that selectively connects a second range cylinder chamber to a pneumatic source when the main transmission is in gear, but exhausts the second chamber when the main transmission section is in neutral.

Abstract: An improved single shift shaft shifting mechanism (300) for shifting a mechanical change-gear transmission (10/110) is provided. The shifting mechanism includes a shift shaft (302) which is mounted for axial and rotational movement in a housing (H) for selectively axially moving and/or locking selected or non-selected, respectively, shift forks (302, 304, 306) relative to the housing. To provide an easily shifted, reliable and economical assembly, the shifting projections are defined by a plurality of generally annular shift pins (316, 318, 320) extending radially from bores (322, 324, 326) provided in the shift shaft (308).

Abstract: A seal assembly (21) is disclosed for use with a housing (H) which defines a fluid chamber (C) and a threaded opening (O). In threaded engagement with the opening is a threaded portion (13) of a device such as a sensor assembly (11 ). The housing defines a counterbore (CB) disposed axially between the threaded opening (O) and an external surface (S). The seal assembly (21) includes a metal support member (23) including a cylindrical portion (27) having inner (33) and outer (35) portions of elastomeric sealing material. The seal assembly is pressed into the counterbore and, by means of the interference fit therebetween, may be permanently retained therein. As the member is threaded into the opening, the underside (16) of the head (15) deforms a sealing lip (39) radially inward into engagement with the threaded portion (13).