FJ62 Transmission Flush with aux Trans cooler (1 Viewer)

Joined
Apr 10, 2017
Messages
515
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Deep South, Powder Springs GA
I know, but you can’t have too many posts on this stuff.
How it starts.

Drain the transmission pan. Here is the drain plug.
Drain it into whatever you have as long as you pour it into a measurable container. You want to add back the exact amount of fluid you drained before you begin. I used a clear tote and 2 cheapo plastic gallon jugs that were exactly alike for measuring purposes. Keep one jug as a clean fluid only jug.
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Added new fluid to the transmission then removed the front plastic to expose the aux trans cooler.
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I used the bottom line because that is the return line to the transmission. I wanted old fluid coming out as the engine ran.
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Used a clear 3/8 ID and ran it to a 1 gallon pitcher. It will fill the pitcher in less than a minute.


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Notice how dark the fluid is? Remember to cycle through the gears. You will only be taking out a gallon or so at a time so you can cycle through the gears multiple times. All in all about 4 gallons worth. I was using 2 identical pitchers and measuuring the fluid level with a marker each time. Flush a gallon, fill a gallon. See how much better the new stuff looks.


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Added new fluid through the trans dipstck hole. Takes a while but it works.
Keep repeating until the color coming out of your hose matches the color you are putting in through the dipstick.
It will take you a few times especially if you are on your own but all in all the whole job is about 2 hours. For me it was a last ditch effort in hopes of avoiding a rebuild. We shall see.
Used:
3 feet of 3/8 Id hose
4 gallons of Castrol TRANS/MERC trans fluid
1 Dollar General clear tote
2 Dollar General plastic gallon tea pitchers
1 funnel from Advance Auto with tiny spout to fit into the transmission dipstick hole.
Happy wrenching Mudders!
 
Joined
Jan 17, 2005
Messages
5,551
Location
Southern Colorado
Well documented - thank you. And, no, this can't be communicated too often. Running the engine to pump out the torque converter and coolers is critical.

You can also use gallon milk jugs as 'pitchers' and toss them when done.

And when you're all done, get the trans fully hot, cycle it thru the gears, and check the fluid level.
 
Joined
Nov 2, 2015
Messages
279
Location
Memphis
I used that other line off of the trans cooler to suck the fluid up to avoid having to pour it all through the tiny dipstick hole.
 
Joined
Apr 10, 2017
Messages
515
Location
Deep South, Powder Springs GA
I used that other line off of the trans cooler to suck the fluid up to avoid having to pour it all through the tiny dipstick hole.
Since completion I have heard about this. I wasn't sure it would work for taking in the same amount of fluid that was dispersing. I like it though because the dipstick is a pita to pour fluid into without making a mess.
 

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