1968ragtop

How much trans fluid does a th400 take? The trans is bone dry right now.

joe68h/o

If takes 9 qts to fill a tubo 400 and convertor if both are empty.

MDchanic

You will keep pouring it in, and looking under the car because it MUST be leaking out somewhere. Just keep pouring.

- Eric

TripDeuces

It's between 10-12 depending on your converter. I would put eight in and then start it up and let it get warm while moving the gear selector through the positions. I don't recommend driving it until it's full. Once warm begin checking it and keep in mind that the fill line is a pint not a quart. I just went through this with my TH400 swap. Hopefully you don't have leaks like I did