Two statements: A says there are two multidisc hydraulic clutches; B says the forward clutch holds components stationary when applied. Who is correct?

Two statements: A says there are two multidisc hydraulic clutches; B says the forward clutch holds components stationary when applied. Who is correct?

• A. Technician A
• B. Technician B
• C. Both Technician A and Technician B
• D. Neither Technician A nor Technician B

Answer: (D)

Understanding hydraulic clutch configurations and what a forward clutch does in a planetary gear set is key here. There isn’t a universal rule that there are exactly two multidisc hydraulic clutches—designs vary, with different transmissions using different numbers and arrangements of clutches, some single-disc and some multi-disc, in multiple locations. Likewise, the forward clutch doesn’t have a single, fixed action of always holding components stationary when applied. Depending on the gear, applying the forward clutch can either drive a element of the gear train or hold a different member stationary to achieve a specific gear ratio. So neither statement is universally true, and that’s why neither technician is correct.

Understanding hydraulic clutch configurations and what a forward clutch does in a planetary gear set is key here. There isn’t a universal rule that there are exactly two multidisc hydraulic clutches—designs vary, with different transmissions using different numbers and arrangements of clutches, some single-disc and some multi-disc, in multiple locations. Likewise, the forward clutch doesn’t have a single, fixed action of always holding components stationary when applied. Depending on the gear, applying the forward clutch can either drive a element of the gear train or hold a different member stationary to achieve a specific gear ratio. So neither statement is universally true, and that’s why neither technician is correct.