5 Speed Manual Transmission

The 5-speed 77 mm manual transmission is a fully synchronized unit with blocker ring synchronizers and a sliding mesh reverse gear. First and second gears have three-piece synchronizer rings, consisting of steel inner and outer cones and a tapered metal ring that is lined on bow ides with friction material similar to automatic transmission friction plates. The cones are independent of the gears and can be replaced separately. Third and fourth gear blocker rings are more conventional in appearance, but are also lined with friction material. The fifth gear blocker ring is brass.

NOTICE: No fluid other than DEXRON(R)-III Automatic Transmission Fluid (GM P/N 12346143) should be used in the manual transmission. Other fluids or additives may damage the blocker ring friction material or its adhesive.

The mainshaft and countershaft are supported on tapered roller bearings and must be shimmed for proper end play. First through fourth speed mainshaft gears ride on caged roller bearings. An aluminum transmission case houses the various gears and bearings. The manual transmission control is mounted on top of the extension housing. The manual transmission control cannot be adjusted and can be serviced independently of the manual transmission.