My 2001 dodge caravan 3.3 is shifting from 3 to 2 but somtimes gos into limp mode even know i replaced the shift selinode twice and replace both speed sensors and transmission fluid filter please help

Marvin

• 85242 Answers
• Posted on Mar 30, 2009

SOURCE: transmission won't shift into 3rd

the trans has a serious failure, that is why the metal, it can be overhauled for less than a replacement

SOURCE: 2001 dodge grand caravan stalls

Glad too hear your making progress, sounds like your dealing with a reasonable shop too. For future reference, take notes when your vehicle acts up. The more information you cn give your technician the easier it is to be fixed. Good luck, let me know how you make out.

R

SOURCE: transmission is in limp mode

try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you

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.

SOURCE: 2001 dodge stratus wont shift

Good Evening, I have a dumb question. have you cleared any current or history codes in the transmission? They will default with codes in the system. Also make note on what they are. If any and we can go from there, and yes tcm would be the next place to go but more info is best as far as codes and such.