Question about 2001 Lincoln Town Car

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Intermittant flashing O/D light

Trans shifts well in all gears but I sometimes experience a rumble at no load RPM (thought it could be the universals) but then came this flashing O/D light error code.

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There is an issue internally that flashing light is like a check engine light for the tranny

Posted on Jul 23, 2009

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2 Answers

Vibration when trans shifts to 4th


it might be transmission problem,check the oil level or add some trans oil treatment.do a scan test & read the number.

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Transmission -does fine until it warms up, then does not want to shift correctly, drive begins flashing.


d flash mans, tranny fault
so scan it. us the obd2 scan tool, any and scan it.
the A/T IS VERY complex, do the tests shown in the FSM
guessing dont work
but in general (experience)
wont shift correctly dont cut it. (200 parts, and 50 was to mess up)
????
flare, skips gears, wont up shift, wont down shift, or shifts wrong speed. what gears work, what dont. just a clue and help goes get better
The tranny TCM can go to limphome mode, this mode is very clear.
and covered in the FSM and
one common failure, that happens with high mileage and poor service (not doing a flush at 50k miles)
is stuck in 1st gear, hot. only.
the ATF fluid gets more thin hot and pump output drops
this is usually a vary bad sign.
the Stall test fails.
the pump pressure test fails, hot.
there is no vacuum lines to this electronically shifted trans.
the ended back 1990(about). with old 3speeds.

scan it, could be something slimple like
the PRNDL shift switch fibbing like crazy. (common)
this car has TCM, a transmission brain.
look for OBD2 DTC errors P07xx (trans)
this TCM (part of PCM) function relies on sensor for shifting
they are:
1: TPS
2: engine INPUT rpm
3: tranny output rpm
4: shift selector.
5: ECT (engine temps)
6: ECU part of the PCM calculates load at all times and sends that to the TCM , so that TCM can down shift on hills, or upshift faster on the flat or down hill.
this LOAD feature is what replaced the VACUUM of old days.

The D light , hopefully is just a bad input (cheap)
scan it. and see, its begging for you to do that.

Jan 02, 2014 | 2001 Honda Odyssey

1 Answer

2004 Ford Explorer transmission shift problems, O/D light flashes, engine RPM high.


Stop using it

If have been, you may have ruined it,
just driving ten miles

Have a trans shop diagnose the issues

The clunk into reverse troubles me alot

I used to own a trans shop

Mar 12, 2013 | Mercury Grand Marquis Cars & Trucks

1 Answer

92 prelude si (auto)


With normal acceleration the 1st to second shift point should be around 2500-3000 rpm. Most of your shifts under moderate acceleration will take place at this same point or when there a light load on the transmission. Under hard acceleration the RPMs will climp higher due to increased power needs and the computer will shift when less power is needed or the RPMs climb to an unsafe speed say5000-6000rpms (depending on where yours redlines). Also going up a steep hill will raise the RPMs higher and goind down a hill will cause a faster shift at lower RPMs. These can always be altered by an individual owner by adjusting shift points, using performance parts and if you have problems (low tranny fluid/trans issues). Your trans RPMS are fine and will vary depening on how your foot accelerates. The shift pattern should be the same every time you drive slow/medium/fast/, look for changes in those patterns you will also catch a problem early.

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2002 s10 manual trans 2.2 engine knock (low end?)


check out your knock sensor , just a thought.

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My s4 light on my 1989 honda integra is flashing and car only will start when light stops flashing whitch happens when ever it likes 2


I found this one the www.hondacarforum.com
http://www.hondacarforum.com/honda-technical/28562-i-have-1989-honda-integra-can-any-one-tell-me-what-s4-gear-stick.html

You have a couple of choices on this Honda transmission... D and S modes. Consider the D as the normal Drive mode and the S for Sport mode. The difference between the two is that in "D", the transmission will shift through the gears all the way to 4th gear and at lower rpm shift points. In "S", the transmission will shift at higher rpm levels and will go no higher than 3rd gear and light S3 on the dash. Once the vehicle is in 3rd gear (S3) you can then press the S4 button and the transmission will go into 4th gear (when conditions dictate). I believe there is even an S4 indicator on the dash signifying the trans is in 4th gear

The last line looks like it is the key here though.

If the car thinks its in 4th gear when you are trying to start it, obviously it wouldn't start...you could probably hunt around and see if there is a sensor on the transmission stick that runs the "D" vs "S" mode

Mar 04, 2009 | 1989 Honda Accord 4 Door

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Transmission problem on 2001 Celica GT Auto Trans - how can I fix this?


I am glad my solution provided you with happiness. A gift, no, you do not need to do that. I appreciate the thought, though. The graciousness of a "FixYa" rating regarding my helpfulness would be GREATLY appreciated. That I all that I need form you. A happy Client. THAT is what FixYa is ALL ABOUT. Have a great week. Thanks again.

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