So I was just wondering if i could use ATF mobile 1 in my trans, and would i have to add any modifiers in it? This is my very first tranny fluid change and I do not wanna screw it up. Isnt it 3.25 quarts??? If there is anything else I should know and or gotta do, let me know.
Mobile ATF?
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BurningRubber
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- Dec 6, 2004
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Yes. I reccomend Mobil 1 Synthetic ATF.
Its around 3.25 quarts so you will need 4 to be good to go.
Make sure you fill it with the car leveled out.
You can either use a pump and fill it through the transmission fill hole, or you can re-fill it through the shifter on the inside of the car (requires removal of shifter, not long or hard to do).
When the fluid starts coming out of the FILL hole on the transmission you are full, just plug it back up... it is just very important to make sure the car is level though.
Its around 3.25 quarts so you will need 4 to be good to go.
Make sure you fill it with the car leveled out.
You can either use a pump and fill it through the transmission fill hole, or you can re-fill it through the shifter on the inside of the car (requires removal of shifter, not long or hard to do).
When the fluid starts coming out of the FILL hole on the transmission you are full, just plug it back up... it is just very important to make sure the car is level though.
CobraRed_96_GT
Active Member
AdRock
Member
It takes more than 3.2 quarts top get it to come out the fill hole. At least it did on mine. It took pretty much all 4 quarts before it started coming out, this was on level ground. I had some extra dextron so I put it in to check just how much would be needed to come out that hole. I then drained it all and put 3.2 qts of some Mobil ATF in there.
BurningRubber
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Yours may be a little different since you have a T-3650 trans, and the origional poster and I have a T-45... but I dont think they are too far off...
I may have used a little less than what is actually called for because some fluid may have still been in the tranny, and not drained out as well.
AdRock
Member
Yours may be a little different since you have a T-3650 trans, and the origional poster and I have a T-45... but I dont think they are too far off...
I may have used a little less than what is actually called for because some fluid may have still been in the tranny, and not drained out as well.
My bad. For some reason I looked at the OP's post and didn't pay attention to the year. I'll shut the hell up now.
CobraRed_96_GT
Active Member
yeah, I use the ATF for what it was designed for - an auto
With the front-mount tranny cooler it takes just about 13 quarts.
CobraRed_96_GT
Active Member
Thanks, that was right before it went in after being built.
How often to change transmission fluid 4R70W (for people searching)
Recommended time for the 4R70W is right around 30k miles, the TC builder DirtyDog recommends 25k miles. That's a full drain including torque converter. Since I don't want to empty the TC each time, a good rule of thumb is just 15k+ miles change out the 9-10 quarts or so you get from sucking it out and leave the TC full. Then Do that again in 15k+ miles. Of course the better fluid you use the less worry, sythetic ATF like Mercon V by valvoline or Mobil 1 syn. ATF don't break down from heat as much - especially if you have a tranny cooler.
I have no idea for the T-45 and TR3650 tho
BurningRubber
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It should because most newer manual trans run ATF because of the lower viscosity helps improve fuel economy. Look up the spec for your trans, and whatever it is, put it in there. I know the 3650's came from the factory stock with synthetic ATF, but a TSB was put out to start using regular ATF for the 2nd gear clunk. I run regular dino ATF in mine.
It's actually because the thinner fluid is required to lubricate the small needle roller bearings the speed gears roll on. ATF is a thin fluid, while gear oil tends to be thick, especially when cold.
If you put gear oil in a trans designed with the roller needle bearings, they would starve for fluid, overheat and the trans would become noisy as hell.
Early Mustang T-5's has different bearing styles under the gears and could run gear oil. However when Borg Warner switched to the needle-style, they also made the change to ATF.
These are the bearings i am talking about. When assembled, it's tough for fluid to reach these unless it's thin
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