Tranny Flush

[derrickmcphate]

Ok I am confused when I change my tranny fluid I should drop the pan and change the filter but does that change all of the tranny fluid? I want to switch to mobil one

[Raul@Stealth Automotive]

Originally Posted by derrickmcphate

Ok I am confused when I change my tranny fluid I should drop the pan and change the filter but does that change all of the tranny fluid? I want to switch to mobil one

no. you need to get out the oil from the TC...

follow these instructions: http://www.amsoil.com/faqs/ATF_and_F...Procedures.pdf

any reason why you want to go with mobile 1?

[derrickmcphate]

i like mobil one and always used it it is in my transfer case but i will do an oil change and the diffs the diffs will have mobil 1 dont know about the motor yet its got 125 on it

[pinkfloyd]

to do a complete flush takes about 20 quarts. I did mine the other week when I put in my valve body.

[NYMustang50]

Thats a scary way to do it. I though these transmissions had a drain plug on the tq it self...

[NCHornet]

Originally Posted by NYMustang50

Thats a scary way to do it. I though these transmissions had a drain plug on the tq it self...

Not after 2000 they didn't, that still doesn't get all the fluid out. I didn't look at the directions that Raul linked to but if it is where you disconnect the return line and run a clear hose to a bucket, start truck, shift through all the gears pausing 2 sec in each gear, as soon as air appears in the hose you stop and put 7 more quarts back in it and do it again, do this three times and you have a complete flush. If this is what he posted to it is the right way and thousands of us have used it for years. I would drain the pan because you can and fill with 7 quarts of fresh, this will be one less cycle you have to go through. Ford claims you never need to change the filter but for $20 it is piece of mind.
Make sure you only use Mercon/DexronIII unless your trans has been rebuilt with newer seals.

NCH