Which is the "out" of the transmission and which is the "in"?

The front line is the "out" line. Unless you are related to Andrew, I'm assuming you can figure out which one is the "in" line.

 

LMAO, no relation to Andrew. Thanks for the answer 444.

 

I did it this way. Easy money. http://www.forgotton.net/diesel/transflush/index.htm

 

Those instructions have been abbreviated and plagerized from instructions that I wrote at http://www.thedieselstop.com/faq/1999faq/Maintenance-AutoT.htm

 

COOL, I am just trying to help.

 

Mark, Nice writeup. I'll be using a BG flush machine and it does what you said but with one person and alot less mess (hopefully). I thought Ford is now recommending Mercon V for everything now though. Your thoughts?

 

The BG flush machines I've seen do not work like Mark's procedure. They remove and replace the fluid one drop at a time. Mark's method will result in a higher percentage of new fluid. If you drain and refill the pan before you start it will help.

 

Ford now recommends MERCON V. That write up needs updating for that change.

 

I was told that Mercon 4 & 5 are the same fluid now. For a couple years I guess.

Use synthetic fluid if you can. Holds up better to heat and abuse. Just spendy.

The procedure written by Mark works fantastic. It was easy and a one person job. The only thing I spent money on was the clear hose and new fluid.

 

I was told that Mercon 4 & 5 are the same fluid now. For a couple years I guess.

There never was a Mercon 4. The only thing I've ever seen was Mercon, Mercon V, and Mercon SP. There may be a Dexron 4, I know there was/is a Dexron lll.

 

COOL, thanks for the correction. This is my first automatic in many many years. Whats is your thoughts on a quality synthetic tranny fluid? I get to replace my 4R100 here soon. Plan on getting a built tranny and want to run synthetic fluid.

 

Mark, in your opinion is the BG machine a bad way to go or just slower than your method?

 

I personally do not like any power flush machine. Just let the truck do itself.

 

I've never seen a power flush machine. They might exist, but I doubt it. All of the machines I've seen use the trans pump for force in the new fluid.

The only problem I have with the BG flush is that I don't know anything about the chemicals they use to "clean" the trans. I have no idea what, if anything, they do to the trans. Other than that the machines do the same job and should take a bit less time because you don't have to shut the engine off and pour in the new fluid.

 

The BG machine uses the transmission pump pressure to do all the work. I don't have the MSDS or anything here but I might be able to get something on the chemicals.

 

MSDS on the way for the BG stuff. The ingredients on the can are as follows:
Petroleum Distillates, Oleic Acid, Methyl Amyl Alchol, 2-Ethylhexanol. Directions are to put in the can into a warm system, then drive it working it through the gears (or on a lift). Then flush. Our rep say its fine to put it in and drive it for about 8-10 minutes.

 

Of course he'll tell you it's fine. Do you think he is going to tell you that his product will destroy the friction materials? Or seals? Of course not.

I don't know if it will, but I don't know that it won't. All that I do know is that I won't let any of those chemicals in my trans because I don't know enough about them. The MSDS isn't going to tell me anything about how the trans parts will react to the BG flush.