Between the torque converter and the engine crankshaft, which component is used to connect them?

Between the torque converter and the engine crankshaft, which component is used to connect them?

• A. Spacer
• B. Insulating material
• C. Flex plates
• D. Front support bushing

Answer: (C)

The component that connects the torque converter to the engine crankshaft is the flex plate. The flex plate is bolted to the crankshaft on its inner hub and to the torque converter housing on the outer edge, forming the connection that transfers engine torque into the transmission. It’s designed to be a bit flexible to absorb torsional vibrations and engine unforgiving torque spikes, protecting both the crankshaft and the transmission gears. It also typically carries a ring gear for the starter to engage. Spacer, insulating material, and front support bushing don’t transmit torque between these parts; they serve other roles like spacing, isolation, or separate support, not the coupling of the crankshaft to the torque converter.

The component that connects the torque converter to the engine crankshaft is the flex plate. The flex plate is bolted to the crankshaft on its inner hub and to the torque converter housing on the outer edge, forming the connection that transfers engine torque into the transmission. It’s designed to be a bit flexible to absorb torsional vibrations and engine unforgiving torque spikes, protecting both the crankshaft and the transmission gears. It also typically carries a ring gear for the starter to engage.

Spacer, insulating material, and front support bushing don’t transmit torque between these parts; they serve other roles like spacing, isolation, or separate support, not the coupling of the crankshaft to the torque converter.