Mike Gerrick, heavy duty parts account manager discusses the 37 Series Red seal and 38 Series Gold seal. For over 75 years, National has made oil bath seals that work so well, you can install them and forget about them. Both are premium seals designed to maximize your uptime and keep your vehicle Mile after mile on the road. That’s National performance.
Learn more at http://www.fmheavydutyparts.com.