99 dodge durango will not shift into 3rd gear

SOURCE: transmission shifts hard down from highway gear only (D>3rd)

I had the same thing! It was a computer issue. It only cost me about $35.00.

SOURCE: Dodge Durango Transmission Problem

Code 0753 means Transmission 3-4 shift solenoid or transmission relay circuit problem. The PCM (engine computer) is seeing an incorrect input electrically for the gear or speed it should be seeing. You will need to find a qualified transmission shop to diagnose the problem. Possible causes for the trouble code start with worn/dirty fluid, electrical repairs & transmission overhaul.

SOURCE: 2002 Dodge Caravan, Tranny would shift, DTC P0700, P0725

replace the input speed sensor to transmission and the wiring pigtail all are available at your chrysler dealer take your vehicle registration in to the parts counter so they have your vin # to get the right part and it is the front of trans by fluid linres to radiator.

Harvey N Tawatao

• 3854 Answers
• Posted on May 05, 2009

SOURCE: 1997 Dodge Ram 1500 automatic transmission won't shift out of 1st

It sounds like your speed sensor may have gone bad.
If you can get it to Auto Zone they can scan the truck for you and let you know if it is the speed sensor. Auto Zone scan for free and and may have the parts right there.
The part is  not that hard to replace and they can give you the instructions on how to do it your self. The only other thing is to take it to a transmission shop and have them scan it and repaire it.
Just be careful that they try not to sell you the whole transmission and not just the sensor if that's what it is.
Good luck and hope this help. Be careful that you do not burn out the transmission as it will not shift, You may have to change the transmission fluid and filter if there already burn. The speed sensor is on the out side of the transmission on the driver's side. Check the wire harness and clips too.

Duane Wong

• 6826 Answers
• Posted on Aug 09, 2010

SOURCE: 03 dodge caravan, 105,000 miles,

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.

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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

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.