Question about 2007 Dodge Ram Truck

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It wont shift into overdrive the transmission has pressure I changed to fluids when I go to pass it wont shift into overdrive

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Strange as it may sound, transmissions do not shift into overdrive to pass
they down shift a ratio to get extra torque from the motor and will stay down shifted until the vacuum actuator shifts it back and only then when the VSS reports to the TCM that a ratio change up is needed will the overdrive click in
If you cannot get OD under any circumstances run the fault codes and check for a problem overdrive servo/ solenoid , TCM unit

Posted on Apr 25, 2016

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Posted on Jan 02, 2017

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4 Answers

DOES ANYONE KNOW WHY MY CHRYSLER 300 DOES NOT WANT TO SHIFT INTO OVERDRIVE WHEN ITS COLD OUTSIDE SHIFTS FINE AFTER THE CAR IS COMPLETELY WARM AND DOES SHIFT INTO OVERDRIVE WHEN IT IS COLD AFTER MY RPMS HIT...


This is a normal condition, the nag transmission control module needs to see a certain temperature of the fluid before shifting into overdrive this is due to fluid viscosity, if the fluid is too thick
due to cold temps the pump cannot supply enough pressure to fully engage
the overdrive clutch, if it did you would have slippage in overdrive

Certified chrysler technician

Jan 15, 2015 | 2005 Chrysler 300

2 Answers

My transmission is not shifting into overdrive I have a code reading of P1346.


smell the trans fluid if it stinks its time to change, change the filter and do a pressure flush to make sure all bad fluid is gone.

Jan 08, 2015 | Lexus RX 300 Cars & Trucks

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1994 automatic transmission A4LD slow upshift in all gears


low fliud pressure in transmission..check levels and change fluid/filter and retry vehicle.

Feb 10, 2013 | 1994 Ford Ranger Supercab

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1990 f150 automatic with overdrive shifts only at high rpms


Kinda sounds like it works when fluid is thick and not after it warms up. If it has been awhile since trans fluid and filter were changed it is the most simple thing to change. The torque converter is a big pump, it may be going and not providing enough pressure. This could be checked on most transmissions by a shop expert. Sometimes pressure can be adjusted externally.

Feb 18, 2018 | 1990 Ford F150

1 Answer

1996 honda accord wont shift into overdrive


For Automatic transmission problem,click the link below:----Overdrive light in the dash blinks? http://repairhelpcenter.blogspot.com/2012/01/overdrive-light-in-dash-blinks.html
--------- Automatic transmission troubleshooting:----

http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html

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Automatic transmission shift lever issues?-------

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

-----------
AUTOMATIC TRANSMISSION FLUID LEVEL? --

http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html

--------------

AUTOMATIC TRANSMISSION FLUID AND FILTER?

http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html

-----------
Transmission fault light on car dash?

http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html

--------
Transmission shifting problem?

http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html

--------
Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

-----------
OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

----------
Why Transmission fluid leaks near radiator?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

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Transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

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****** wont go in reverse?

http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html

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Automatic transmission will not go into reverse?

http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html

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Transmission is making buzzing noise?

http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html

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This will help.

Thanks.

Mar 04, 2012 | 1996 Honda Accord

1 Answer

Has a noise in front end also wont shift into low,second or overdrive.


SOUND PROBLEM IN TRANSMISSION OIL PUMP OR TRANSMISSION TORQUE CONVERTER.SINCE YOU NEED BOTH OF THEM EITHER ONE MALFUNCTION THERE WILL BE NO LOW DRIVE GEAR OR OVER DRIVE.MAKE SURE TRANSMISSION FLUID LEVEL NOT LOW. IF ALL LOOKS GOOD. YOU CAN CHANGE TRANSMISSION FLUID AND CHANGE FILTER FIRST TO SEE IF HELPS ANY. IF NOT TAKE TRANSMISSION TO SHOP.THEY NEED TO RUN OIL PUMP PRESSURE TEST TO SEE IF OIL PUMP BAD.

Dec 12, 2010 | 1999 Jeep Grand Cherokee

1 Answer

03 dodge caravan, 105,000 miles, 2.4L transmission will shift in all gears but will not go into overdrive from 3rd gear. when it does shift to overdrive i try to speed up on the gas and it shifts back into...


I'm afraid that the transmission's O/D solenoid malfunctioning or kick down cable may be misadjusted if so equipped.

looking at a rebuilt transmission if you plan to keep the Caravan.

Or, alternatively, could get a low mileage transmission from a salvage yard and have it installed.

----
Servos/Accumulators The servos are hydraulic pistons and cylinders. They resemble the hydraulic actuators used on many other machines, such as bulldozers. Hydraulic fluid enters the cylinder, under pressure, and forces the piston to move to engage the band or clutches.
Servo operation tccs7015.gif

The accumulators are used to cushion the engagement of the servos. The transmission fluid must pass through the accumulator on the way to the servo. The accumulator housing contains a thin piston, which is sprung away from the discharge passage of the accumulator. When fluid passes through the accumulator on the way to the servo, it must move the piston against spring pressure, and this action smoothes out the action of the servo.
Hydraulic Control System The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.
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Aug 09, 2010 | 2003 Dodge Caravan

2 Answers

2000 S80 Tranny wont shift to overdrive, and after stopping at a stop sign it wont shift to first, stays in 2 or 3, Turn key off and start the car, tranny shifts starts out in first, still no overdrive....


Greetings Idpeters:
Please check your transmission fluid level. After the engine is warm pull the transmission stick and make sure the level is close to the full line and that the transmission fluid is red and not brown. You may have to change your transmission fluid and screen. If you plan to do it yourself I can advise you on how to change it step by step or you can take it to a transmission shop or dealership for a transmission tune-up. Good Luck

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1 Answer

Transmission will not shift out of first in drive position


the trans is toast, most likely an internal fluid pressure seal has failed.

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1 Answer

2002 Ford F150 5.4L hard shifting


Have you ever changed the transmission fluid flush and replaced the transmission filter?

Jan 11, 2009 | 2002 Ford F150 Regular Cab

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