2007 Lincoln Navigator All-Wheel Tranny Fluid Change Noted Problems and Solutions (See Text!!)
Nicholas Turk Nicholas Turk
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 Published On Dec 24, 2018

So I apologize ahead of time for the poor videomanship but it was as good as I could do on the fly...

This text is for clarification because I did miss speak a few times during the video. Again this video is NOT a "how to" but tips for resolving problems during a 2007 Lincoln Navigator all wheel drive 7L74 7000 Series Transmission fluid filter change. There are other videos out there for fluid changes and bumper removal...you can use those just as I did...

Problem#1: Passenger side pipe hanger interference from the exhaust y-branch manifold blocking access to removing 1 of 21 transmission pan bolts. - Use a sawzall to carefully cut right at the pipe to remove it.... Once cut it will slide right out of the way. The driver side pipe hanger can stay to keep the pipe stable and free from vibrations. Besides, you'll save yourself a lot of time and headache from having to remove the piping.

Problem #2: Refilling the transmission fluid. As stated in the video there is no dipstick at all for the all wheel drive 7L74 7000 series transmission, filling via the transmission cooler return line works best. I used the following supplies from Lowe's....

-SharkBite 1/2-in Push-to-Connect x 1/2-in Push-to-Connect x 1/2-in dia Standard Tee Push Fitting
Item # 818134
-SharkBite Brass 1/2-in Push-to-Connect Check Valve
Item # 864034
-EASTMAN 1/2-in x 10-ft Pvc Clear Vinyl Tubing
Item # 879263. (More than you'll ever need!!)
-Hyper Tough Multi Use Fluid Pump
Walmart # 567001168
-1/2" or assorted hose clamps from any auto part store

Pause the video at the tranny cooler for a visual reference. The vinyl tubing was used to make the connections between all components. Don't cut it too short or too long...about 2-3" on all ends of the t-branch and about 5-6" on the inlet of the check valve from the pumps discharge. Make sure the check valve arrow is pointing towards the t-branch. The 1/2" vinyl is snug enough to slide on the tranny cooler outlet and small enough to squeeze in the tranny return line.

I measured 6.5 quarts of fluid in my drip pan from my drop, so I put 7.5 quarts back to account for fluid lost from the cooler and error.

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