Do I need to drain one quart of my transmission fluid before adding Lucas
Q: How should I use Lucas Transmission Fix?
A: We recommend adding a bottle of Lucas Transmission Fix each time you change your transmission fluid (approximately every 30-40,000 miles), or adding a bottle to your current fluid to fix a small leak.
https://lucasoil.com/products/problem-solvers-utility/lucas-transmission-fix
Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance. Use also in light duty manual transmissions to increase shifting ease and transmission life.
Key Benefits
- Contains no solvents
- Lowers operating temperatures and stops foaming
- Can be added to existing fluid without draining any out
- Effective in an extremely high percentage of cases
The instructions should be on the bottle.
It’s not clear
It’s a quart for a quart. Drain a quart, add a quart. @Jakob