Transmission Retaining Plug for Automotive Industry

Transmission Retaining Plug for Automotive Industry

Developing an under-the-hood transmission component that requires tight tolerances and provides resistance to heat, oil, and other automotive fluids and chemicals; an Automotive OEM customer partnered with Woodland Plastics to mold this retaining plug out of a thermoset phenolic material – SBNA RX 655.

This transmission component is injection molded in a 4-cavity tool from a 50-ton thermoset injection molding machine. The molded part is deflashed in an automatic wheelabrator, post baked in an oven to de-gas the parts, inspected, and then degated in our automatic degating machine before being centerless ground, washed, dried, inspected, and finally shipped to customer plants around the midwest. Final part weighs roughly 2.9 grams with a tolerance of (+/-) .0004 per inch.

Project Highlights for Transmission Retaining Plug

Product Description

Transmission Retaining Plug used within an automotive transmission application.

Molding Process

Injection – Thermoset


SBNA RX 655 – Phenolic Thermoset

Equipment Used to
Manufacture Part

50-Ton Thermoset Injection Molding Machine



In-Process Inspection

Dimensional Inspection

Part Size

16mm length x 12mm diameter

Estimated Part Weight

2.9 grams

Industry for Use


Standards Met

Customer supplied Drawing

Product Name

Retaining Plug