Case Study

Transmission Shift Tower: Select-a-Seal Durability and Robustness

Beaded Fiber Gasket


A Six Sigma project by a major transmission manufacturer found that seal problems traditionally were among the most common warranty items. A case in point involved warranty claims on a shift tower, which used a beaded fiber gasket.



After analyzing and testing fiber composite, Select-a-Seal® and rubberedge molded seals, the Select-a-Seal gasket provided the best combination of durability and reduced rework costs.

Test Cycle:

-40°C to 150°C Continuous Cycle, 4 hours total (6 complete cycles per day) 2 psi continuous oil pressure, static charge non-circulating



  • Lowered warranty claims
  • Eliminated field complaints
  • Improved customer satisfaction