The TCI Saturday Night Special torque converter is built for Ford C4 transmissions with a 26-spline input. It provides a 1600 to 1800 RPM stall behind small blocks and 1800 to 2000 RPM behind big blocks, and it has an 11.4-inch bolt circle. A popular choice for show cars and street rods, it uses many of the same manufacturing features as full competition TCI converters, including furnace-brazed fins and a hardened, pre-ground pump hub. For an accurate stall estimate, TCI support can review vehicle weight, engine displacement, power adders, rear gear ratio and tire diameter.
- Fits 26-spline Ford C4 transmissions
- Advertised 1600-2000 RPM stall depending on engine
- 11.4-inch bolt circle
- Furnace-brazed fins
- Hardened, pre-ground pump hub
- Part number: 450900
FAQ
What is the stall speed of the TCI 450900 converter?
It carries an advertised stall of 1600 to 1800 RPM behind small blocks and 1800 to 2000 RPM behind big blocks.
Which transmission does it fit?
It fits Ford C4 transmissions with a 26-spline input and an 11.4-inch bolt circle.
How can a more precise stall rating be determined?
TCI support can provide a more accurate stall range given the vehicle weight, engine displacement, power adders, rear gear ratio and tire diameter.

