Change speed sensor on auto transmission - 1997 Ford Taurus

so did not check all fuses first?
then scan the PCM for all transmission DTC errors first?
oops.
1999 dodge durango 5.9L (46RE TRANS i GUESS)
there is no , in or on tranny input speed sensor
the PCM uses ENGINE RPM for that. (crank sensor RPM, CKP)
if you scan the PCM you will not see DCT error for input speed sensor there is none.

Trouble Code: P0753 (5.9L V8 VIN Z Auto)
A/T 3-4 Solenoid/Transmission Relay Circuit Failurenone there below. but sure CKP is. crank speed
and SOL 2 and gov pressure, are key.

SOLENOID 2 bad? above.
why are you not scanning it first. for DTCs
what if governor pressure signals are wrong. pin 29
what if the scan told you it was. likethis.
examples
Trouble Code: P0700 (5.9L V8 VIN Z Auto)
Automatic Transmission Control System Malfunction
Trouble Code: P0711 (5.9L V8 VIN Z Auto)
A/T Transmission Fluid Temperature Sensor Signal - No Rise After StartupTrouble Code: P0705 (5.9L V8 VIN Z Auto)
A/T Check Shifter Signal Circuit Malfunction''
Trouble Code: P0715 (5.9L V8 VIN Z Auto)
A/T Input Speed Sensor Circuit MalfunctionISS is what? (CKP is my guess)

lots more on gear errors
then
Trouble Code: P0748 (5.9L V8 VIN Z Auto)
A/T Governor Pressure Solenoid/Transmission Relay Fault783 is last one. lots of P07 errors on this box
all covered in the service manual in detail.
learn that some cars the PCM has what are called virtual or derived sensors, like engine load is (used to shift too)
and inputs speed, is CKP sensor and ABS the 4 sensors abs are averaged to do speed.(mph)
but in this case it is crank speed CKP
no PCM schematic shows any ISS at all

one can not fix modern cars lacking a SCAN tool, USA OBD2 .
not really and ASE class Day 1,
read all TSBcheck all fusesscan it.service manual online, great !
https://eautorepair.net/Marketing/Default.asp

theory and reviews

https://tgdaily.com/technology/onwheels/chrysler-corporation-and-the-46re-transmission-what-you-need-to-know/

the RE is electric shifted the older RH is hydramatic, shifted and not the same thing,so how can if fail.
sure speed sensors sure.but what else.
the pcm fails to pick he 3rd gear soleniodthe PCM is in limp mode.the gov signal sensor is bad. and wrong (not sure how to replace it me., output sensor dead. (no)PCM sees gross CKP errors crank RPM way off or skips.low pump pressure in the transservo drive to band failing and no 3rd gear. possible.more simply after scan replace this set kit.https://www.ebay.com/itm/194076774950?hash=item2d2fe09226:g:flYAAOSwX9FZKCwl&amdata=enc%3AAQAHAAAA8Auj9VxgzbBbY1y72FuSN8kY5Rr6S3No4BqIm0Ahxvpol8ifEkPhCjcL9RfwxI1dPT9gboPhrqEcTmFagdyeF9TiffbFSjrtI7XOnIbc8G%2F6JCafmPc6idA7aFhq5Y%2FTxfPDpQyhD1vs1akPE%2FD%2FoH3e9fD3d%2BwcwGu4N0GMG1fIDbLPAnG6cWwwzGUd9zPVWm9tFxHxI1viGJn2aLG7%2F3zQjo4VHwpnCeea9lwjV18DOhcloDRRJMzBojw3Hfb8xJdJUJb2cwSgy1LKickqaxU8QdQHy2zv8NBG1ACbb3ZN%2FE9bD%2FlT1cBqykbdirlNlA%3D%3D%7Ctkp%3ABk9SR4SKlvbYYA




A500 / A518 / A618
(42RE / 44RE / 46RE /47RE /48RE)
Chrysler Jeep Dodge Ram
Fits 1996-99This Package Contains:
One (1) New Borg Warner Pressure Solenoid(EPC)
One (1) New Governor Pressure Sensor (Transducer)
One (1) New Overdrive & Lock-up Solenoid Assembly & Harness
One (1) New Governor Solenoid Body Gasket


recap and conclusions. electronic shifted trans. TCM
not getting 3rd gear has many causes:
I'd hazard a guess that pump output pressure and regulator are working in the box. (1 >>2shifts ok)
3rd gear solenoid not dead?
and the lies told by governor pressure sensor, makes the TCM shift wrong (computer GiGo logic) caused.
3rd gear servo piston dead.
or some odd Limphome mode, (iDK them all) (ignoring DTC errors? ) Some trans in limp slip a gear.
The governor must see tail shaft speeds correctly or it will not up-shift all the way.

a scan tool can be bought or rented. or ask others to scan it, any shop can, or some Autostores can
there is no reason no to scan it after fuses check, unless 3 gear is needed to get there (hummmmmmm)
$100
also the tool pays for it self (it's free man) the first $100 in labor not spent,. amazing facts no?
a real scan tool not $20 lame code reads,
a real tool see all Dodge codes.
cheaper readers only show DTC errors only with "CEL lamp ON"< , P07xxx code (7 means transmissions errors)
better tools start at %100

launch band can, CRP123

https://www.amazon.com/gp/product/B01HNO5PLY/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=obdadvisor-transmission-20&creative=9325&linkCode=as2&creativeASIN=B01HNO5PLY&linkId=0ad31cf15bd381a27e78921099f807d3




see reviews here,

https://www.backyardmechanic.org/our-picks-for-best-obdii-scan-tools-that-read-transmission-codes/


the fuse that runs pin 16 on the OBD2 DLC scan port (12vdc ) must not be blown or the scantool fails (not broken fails to communicate)

Hi Debbie, I'm Al with Big A's Auto Repair
Debbie, the speed sensors on the transmission or located on the side of the transmission there are 2 sensor an Imput and an Output speed sensor. For further assistance go to my website. Have an awesome day Debbie.
Auto Repair

no
a vehicle speed sensor ( VSS) reports on the vehicle speed to the ECM, speedo and TCM
the turbine speed sensor reports on the input shaft speed so that the TCM knows when to change ratios against the VSS reports
the sensor is readily available from dealer spares , transmission shops , e-bay or the wreckers / junk yards
talk with an accredited transmission specialist shop

The speed sensor could be located on the back of the transmission near the driveshaft.
You can look it up on the auto parts websites for a visual.

The two problems may or may not be related. First go to the vehicle speed sensor on the rear axle to see that the wiring and connection is clean and tight to the sensor. If it is all good there then change the vehicle speed sensor, this should fix the speedometer. The Dodge transmission has it's own speed sensor and if it is affecting the shift, it should be storing a transmission code. Also the wiring harness inside the transmission may be faulty.

the speed sensor is on the transmission and controls the cruise control , ratio changes if auto
they are available from dealer spares or wreckers/junk yards or possibly e-bay

go to pep boys and by the book for your car! it will tell you everything and anything that you can possibley think of

never heard of this ??speed sensor would only control the gearchange of the gearbox not engine performance ,well i would have thought so but ????.What country you in to get away with changing the gearbox from auto to manual????definatly not spain

I have the same problem with my 95 Toyota T100. My O/D off light started flashing when my speedometer cable broke this week-end. I assume the electronic transmission is using the speed data to manage the overdrive.
Have your speedometer problem fixed and your flashing light will turn off.