Transmission Fluid Fill Adapter Tool SST-6604 Type

Transmission Fluid Fill Adapter Tool SST-6604 Type

Transmission fluid fill adapter for sealed transmissions that lack a traditional dipstick tube. Many modern GM transmissions including the 6L80 and 6L90 require fluid to be added through the fill plug on the transmission case. This adapter connects to common fluid pump systems.

Core Transmission Supply stocks professional-grade transmission tools selected based on real shop experience to support both DIY rebuilders and professional transmission shops. Every tool we sell has been proven to perform reliably in demanding shop environments.

• Fits 6L80, 6L90, and similar sealed transmissions
• Threads into factory fill port
• Compatible with standard fluid pumps
• Prevents overfill and spills
• Reusable aluminum construction
• Includes sealing O-ring

Fitment: Universal — GM Automatic Transmissions

All parts sold by Core Transmission Supply ship from our facility with quality inspection. Professional installation recommended for optimal performance and longevity.