TCI TH400 Racing Transmission Filter & Reusable Pan Gasket Kit 1966–1991 High-Flow Contamination Control

This kit was engineered for TH400-equipped cars and trucks from 1966 through 1991 to deliver better filtration and a dependable pan seal without replacing the entire pan or converter. It combines a high-flow transmission filter tuned for racing and spirited driving with a reusable gasket that resists deformation, helping maintain a clean circuit and simplified maintenance.

How will this kit affect transmission fluid circulation and contamination control?

The TCI filter improves fluid passage to the pump and torque converter, reducing restrictions common with stock elements. Its media is sized to capture typical transmission wear particles while preserving flow rates needed under higher loads.

• High-flow filter media reduces pressure drop to the pump
• Catches metallic debris and clutch material to protect servos and valve body
• Designed for racing and heavy-duty street use where heat and shear are elevated

What makes the pan gasket reusable and more reliable than single-use gaskets?

Instead of a crush-style paper gasket, the kit includes a form-stable gasket that compresses to seal, then recovers after removal. The material resists oil soak and swelling, which helps prevent leaks after repeated service intervals.

• Durable elastomeric compound resists transmission fluid and heat
• Retains sealing dimensions after installation and removal
• Reduces need to replace gasket at every pan service

Will this part fit my TH400 from 1966–1991 and how easy is installation?

This kit is vehicle-specific for TH400 applications spanning 1966–1991. Installation is straightforward for anyone comfortable with a basic transmission drain and pan removal; no special tools are normally required beyond standard hand tools.

• Direct-fit for standard TH400 pan bolt patterns
• Includes racing filter P/N 228500 sized for TH400 systems
• Typical install: drain fluid, remove pan, swap filter and gasket, torque bolts to spec

How does the kit support routine maintenance and track-day preparation?

By combining enhanced filtration with a durable gasket, the kit simplifies maintenance intervals and makes track prep more reliable. A cleaner circuit reduces valve body wear, and the reusable gasket saves time during repeated fluid changes.

• Helps extend component life through improved contaminant capture
• Speeds service with a gasket that can be re-seated after removal
• Lightweight kit (approx. 1.5 lb package) is easy to handle during shop work

Who is this for: This TCI 228500 filter and pan gasket kit is aimed at hot-rodders, vintage muscle owners, and performance-minded technicians running TH400 transmissions from 1966 to 1991 who want a cost-effective upgrade for better flow, improved debris control, and a dependable reusable pan seal. It’s well suited to street/strip vehicles and to anyone wanting a straightforward service-upgrade without modifying the transmission housing.