D5. This will use all 5 gears. D4 will not shift into 5th (overdrive). This causes higher revs on the highway, more noise and less fuel mileage. D4 is only really used when going down long hills for better engine braking. Leave it in d5 and let the cars computer do the shifting for you.
D 5 only
SOURCE: My 03 lincoln ls seems to slip gears while
you might want to have the filer and fluid changed in the transmission.
SOURCE: What gear should i drive around in d5 or d4 in my
If it is city driving....D4.....Highway....D5
SOURCE: when i put my lincoln ls in drive it shuts off but
1976 Lincoln Mark IV that shuts off when I put it in gear. What is the issue?
SOURCE: The 2003 Lincoln LS has a D5 and D4 only on the
D is for Drive. 5 and 4 is for the gear. the higher the gear the better fuel economy.
SOURCE: I have a 2001 Lincoln LS, when I put the gear into
There is a spring damaged in the valve body, these are known for causing loss of 4th and 5th gear and an E where the shift indicator is read on the dash. The spring is the 3-4 prestroke spring, and an updated one is made by Sonnax and available through Fatsco in NJ, look them up on the web.
It is a 6 dollar part but does require some serious time to reinstall, and is not really a DIY job unless you have a lot of patience (the entire bottom control section/valve body needs to be removed from the car and serviced on a bench) and an inch-lb torque wrench. [email protected]
In your Lincoln LS, you will have 3 transmission options to choose from. The first is the SelectShift, which operates similar to a manual transmission but without the clutch. The other 2 are the D4 and D5 options that you are referring to. The number after the D is really a reference to how many gears it will shift through. D4 = 4 gears, D5 = 5 gears. All that being said, it really should operate closer to a 4 gear transmission with an overdrive gear when the car is in D5. Think of it like the "drive" and "overdrive" in other cars. I have heard that to maximize fuel economy, use D5 for highway driving and D4 for city driving.
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