* Transmission Problems: This is the most likely culprit. Issues could include:
* Low transmission fluid: Check the fluid level immediately. Low fluid can cause serious damage. If the fluid is low, don't drive it until it's topped off and the cause of the leak is identified. Also check the fluid's color and condition – burnt or dark fluid indicates problems.
* Faulty transmission bands or clutches: These internal components wear out over time and can cause slippage or complete failure.
* Solenoid problems: These electrical components control fluid flow within the transmission. A malfunctioning solenoid can prevent the transmission from engaging properly.
* Torque converter issues: The torque converter connects the engine to the transmission. Problems here can prevent power transfer.
* Internal transmission damage: This could be anything from worn gears to a broken shaft.
* Engine Problems: While less likely if the engine is running, problems could still be to blame:
* Lack of power: If the engine is running weakly or struggling, it might not have enough power to overcome the transmission's resistance. Check for other symptoms like rough idling or unusual noises.
* Engine misfire: A misfire could result in a loss of power.
* Drive System Problems:
* Broken or disengaged driveshaft: This connects the transmission to the wheels. A broken or disconnected driveshaft will prevent the car from moving.
* Differential problems: The differential allows the wheels to rotate at different speeds during turns. Problems here could cause the car to not move, or move erratically.
* Other Possibilities:
* Park/Neutral safety switch: This switch prevents the car from starting unless it's in Park or Neutral. If it's faulty, it might prevent the car from going into drive.
* Shift linkage issues: Problems with the linkage that connects the shifter to the transmission could prevent the transmission from selecting Drive.
* Faulty computer/sensor: The car's computer controls many aspects of the transmission. A faulty sensor or computer module could be causing the problem.
What to do:
1. Check the transmission fluid: This is the most crucial step. Do this immediately.
2. Check the engine: Make sure the engine is running smoothly and producing adequate power.
3. Have it towed: Don't attempt to drive the vehicle if you suspect a serious transmission issue. Further damage could be costly to repair.
4. Get a professional diagnosis: Take your Venture to a qualified mechanic or transmission specialist for a proper diagnosis and repair. They have the tools and expertise to pinpoint the problem.
Ignoring a problem like this could lead to significantly more expensive repairs down the line. Get it checked out as soon as possible.