

This is useful for economy in relatively flat terrain and for starting on slippery surfaces (wet mud, snow, ice, etc.). These models start off in Second gear when in the D2 position. Early models have two drive positions marked with a "2" and a "1" (P-R-N-D2-D1-L Park, Reverse, Neutral, D2, D1 and Lock). All models follow a quadrant which has six stations. The selector lever varies depending on years and car models the transmission is used in. The M-3x has three forward and one reverse gears. This usually indicates a higher torque load capability, but may refer to other variations that may not increase torque rating. The second number refers to a specific variation. The earlier M-8 and M-1x cast iron case transmissions are much stronger than the aluminum models, although the M-6x may handle as much power as the M-1x series. This isn't, however, a general rule with Borg-Warner automatics. In this case the rising series number is relative to transmission strength-a larger number will withstand more power than a smaller number. The M-3x, 4x, 5x and 6x transmissions are all aluminum cased transmissions that are related to the M-35 (the first of the aluminum Borg-Warner automatics). The "3" in the number refers to the specific series of transmission. When model number specific it will use the exact model number.

When this article refers to "M-3x" it refers to all models. This article also applies to variations-the M-36 and M-37. The Borg-Warner 35 transmission (BW-35) is an automatic transmission produced by the BorgWarner company.
