D = Drive. Usually locks up the uppermost gear, which is overdrive.
(D) = Overdrive. A gear in which the output is greater/faster than the
I'm not familiar with the transmission used in the Taurus, so I can't really
say much more. But it sounds as if your overdrive is failing to engauge.
Are you sure gas mileage hasn't dropped? If you are not going into
overdrive anymore, your engine will be running at higher RPM while cruising
and this will consume more fuel.
Wait until you get a response from someone more familiar with the Taurus, as
I drive older, bigger Fords with the AOD transmission, or the C6
transmission (1987 Lincoln Town Car, 1971 Ford LTD).
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wow, consider yourself extremely lucky to have an AX4S tranny that's lasted
148k miles! As far as you not noticing a difference between D and the other
D (Over-Drive or OD), you really shouldn't unless you're on the highway. OD
just kicks into another gear.
You should probably run some Auto-RX in the tranny though. The stuff is a
necessity for cleaning out your tranny and just for general maintenance.
Visit their site at www.auto-rx.net and also go over to the
(http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=forum ;f=5) for some
independent discussions on this stuff from general enthusiasts! If you want
low maintenance on your tranny, I'd suggest using synthetic ATF in there.
I've used Amsoil in my '97 Taurus, and my recent oil analysis showed the
stuff is still good and it's been in there for 2 years already. Granted I
have a secondary tranny cooler and also use a magnefine filter, but that's
only because I go all out on preventive maintenance! If you want Amsoil
ATF, June Han sells it AT dealer cost, that's a huge discount. His email is
firstname.lastname@example.org (take out nospam of course). Good luck,
The circle over the D is overdrive (4th cruising gear), the D is for
In either drive, you should feel the cars engine speed up and slow down
as it goes from 1st to 2nd to third gear. If it is shifting through all
maybe your engine needs some help if its doggie. There is a whole laundry
list of thing to do on a taurus that could cause that.
If its shifting through all three gears, the trannie fluid level is up to
does not smell burnt, and is the red or orangeish color (not black or dark
brown), i would leave it alone and drive it until it dies. The only time
you will feel the overdrive kick in anyway is on the highway. If the
torque convertor was not locking up, you would just lose a little fuel
mileage. Have you noticed your mileage changing any? It would probably be
around $2000 to have yours
rebuilt with a convertor. Give or take a few hundred. Many trannie shops
will offer you a free evaluation. You might take it to a few different
that do this and see what opinions you get.
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