The Spicer TTC Magnetic Plug, part number 50-39-20 or 503920, is a drain or fill plug designed to capture metallic debris suspended in gear oil, helping maintenance crews detect wear before it becomes a failure. Magnetic plugs are a standard service item on transfer cases, axle housings, and manual transmissions, and this plug is sold individually. Pro Gear and Transmission carries genuine Spicer TTC parts. Not sure this is the right plug for your unit? Give us a call and we can help you confirm proper fit.
Interchanges:
- Tremec SX50-39-20
Features
Genuine Spicer TTC magnetic drain or fill plug
Part number 50-39-20 or 503920
Magnetic design captures metallic particles in gear oil to aid wear detection
Sold as an individual unit
Suitable for transfer case, axle, or transmission service applications
Used in these Spicer Transmission models
