Why not do it yourself? It can be donme in your driveway.I promise you they would put the wrong fluid it anyway, so hy have them do it? Okay I am in the holiday spirit and I always need typing improvement.
You will need 21-24 quarts of Mercon/Dexron III ATF. This hasn't been made under this name since June of 07, but Napa sells their ATF and it is the old Mercon/Dexron III, and is made by Valvoline.
Changing automatic transmission fluid (ATF) in a SuperDuty truck with 7.3L engine and 4R100 automatic transmission. (Will also work on earlier trucks with E40D transmission.)
I've done this alone. It's easier with a second person, and sometimes helps prevent spills.
1. Things you need to get started:
a. The transmission system holds almost 18 quarts of ATF, and you must waste a couple of quarts to be sure you get it all purged and replaced, I would just buy 2 full cases ( 24 quarts)
b. A 10 foot length of clear tubing and one hose clamp, sized to fit over your cooler line. There have been different size cooler lines over the years, so check before buying! The metal part of your cooler return line is probably 3/8th inch outside diameter (OD) with a ferule on the end of it, so if you can find 7/16th inch inside diameter (ID) tubing, that will probably work great. If you use ½” ID, it will be a loose fit over the ferule and will need a good hose clamp tightened good to prevent it from leaking. So just in case, place a big drain pan under the connection. And some folks have reported they were strong enough to force a 3/8th inch ID tube over the ferule. If you try that, dipping the end of the plastic tubing in very hot water for a few seconds will make the job easier.
c. If you don't already have a special funnel that fits into the transmission dipstick tube, then you will need one of those, too.
d. If your transmission has ever been worked on by a Ford dealer, you probably have a Magnefine in-line filter in the "rubber" part of the cooler return line, near the front axle. If so, you should replace that filter every time you change the ATF. You can get one from your Ford dealer, or for about $15 from Magnefine Filters--Online Order Form. Your cooler lines are probably 3/8th inch, so you want the 3/8th size Magnefine inline filter.
2. Note: In cool or cold weather, be sure the transmission is up to operating temp before you begin. It’s not supposed to happen, but several members have reported ATF coming out the cooler bypass line instead of the cooler return line if they tried these procedures with a cold transmission. Also, in cool or cold weather, keep the new ATF in the house so it’s around room temperature of about 70º F. when you pour it in the transmission.
3. If your pan has a drain plug, drain the pan, then replace and tighten the drain plug. If it doesn't have a drain plug, skip to step #5.
4. Pour 7 quarts of new ATF into the filler [dipstick] tube.
5. Disconnect the transmission-fluid return line at the transmission - from where the ATF returns to the transmission from the cooler(s). This is the line towards the rear of the transmission. This is where the old ATF from the transmission, torque converter and coolers will be pumped out. Clamp the clear tubing over the line that you removed from the transmission.
6. This is where the second person comes in handy. One person starts the engine, while the other holds the line over the drain bucket. A clothes pin can replace the person holding the line in the bucket.
a. Run the engine at idle RPM until you have around 1.5 gallons in the drain bucket, then you should see a big air bubble in the clear tubing. Ignore tiny bubbles. As soon as you see a big air bubble, shut off the engine. Then double-check the amount of used ATF in the drain bucket. You should have around 1.5 gallons. If you have much less than 1.5 gallons, then you probably killed the engine too soon, so crank the engine and pump out some more old ATF.
b. If you drained the pan in step 3 and poured in 7 quarts of new ATF in step 4, then while the engine is idling in step 6a above, move the shifter through each position from P to 1, pausing about 5 seconds at each position. This will change some fluid that would otherwise be trapped in the valve body, accumulators, and clutches.
c. If you poured in 7 quarts of new ATF in an earlier step, then refill through the dipstick tube with 6 quarts of new ATF. (That's 13 quarts total so far). If you have not poured in any new ATF yet, then pour in 7 quarts of new ATF, for a total of 7 quarts so far.
7. Repeat steps 6a and 6c until you have poured in a total of 19 quarts of new ATF (7 + 6 + 6).
8. Remove the clear line and reconnect the cooler line to the transmission with 20 lb/ft torque.
9. Drive the truck several miles to get the transmission up to operating temperature. Then check the fluid level and use the last quart of ATF to top off.
Note: You should always check the ATF level when the transmission is up to operating temp – not when it’s cold. The cold marks on the dipstick are not very reliable. When first filling the transmission, use the cold zone on the dipstick to get close to the right amount of ATF in the transmission. But for topping off, do it with a hot transmission using the hot area of the dipstick. When you get done, you want the transmission full, but not overfull.
10. Properly dispose of the used transmission fluid.
11. Congradulate yourself! And your engine starter/killer person.
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