6L80 Converter Setup: Stall, Lockup, Cooling & Install Best Practices
Quick Nav:
Stall Selection •
Lockup Strategy •
Cooling & Fluid •
Install Checklist
Stall Selection
Match stall to the engine’s torque curve, vehicle weight, gearing, tire size, and intended use. Too low a stall can lug; too high increases heat. We verify your choice against your combo before shipping.
Lockup Strategy
Multi-clutch adds lock-up area for durability under load and reduced slip—recommended for heavy towing or high-power builds. Single-clutch suits up to ~600 HP and moderate towing.
Cooling & Fluid
Heat is the enemy. Verify strong cooler return flow, consider an auxiliary cooler, and use fresh full-synthetic DEXRON-VI. Set fluid level at operating temperature.
Installation Checklist (quick hits)
- Confirm converter fully seated before install
- New flexplate bolts & torque to spec
- Flush or replace cooler & lines; check return flow
- Set fluid level warm; road test and recheck
- Monitor slip & temps on first drives
6L80 Tech FAQs
Will Multi-clutch feel different?
Expect firmer, more consistent lock-up under load and better heat control—ideal for towing/hauling or high power.
Break-in?
Normal driving with varied load for the first 200–300 miles. Avoid extended WOT towing pulls until temps and behavior are validated.
*HP figures are guidance; vehicle weight, tires, gearing and tuning affect capacity.