* Low Transmission Fluid: Insufficient or contaminated transmission fluid is a very common culprit. Check the fluid level and condition. Low fluid can lead to slipping, hard shifting, or no shifting at all. If the fluid is dark, burnt, or smells bad, it needs to be replaced.
* Transmission Problems: This is a broad category that could include:
* Worn clutches or bands: Internal parts of the automatic transmission wear out over time, leading to poor shifting.
* Faulty valve body: This controls fluid flow within the transmission. A malfunctioning valve body can cause a range of shifting problems.
* Torque converter issues: The torque converter connects the engine to the transmission. Problems here can prevent proper gear engagement.
* Solenoids: These are electrically controlled valves within the transmission. A faulty solenoid can prevent the transmission from shifting correctly.
* Shift Linkage/Cable Problems (Manual Transmission): If it's a manual transmission, there could be issues with the linkage connecting the shift lever to the transmission itself. This might involve worn or broken cables, linkage parts, or a misadjustment.
* Electrical Issues: Problems with the transmission's electrical components, such as the shift selector switch, neutral safety switch (prevents starting in gear), or wiring harness, can interfere with shifting. A faulty neutral safety switch, for instance, might allow starting but prevent shifting.
* Computer/PCM Issues (Automatic Transmission): The Powertrain Control Module (PCM) controls the automatic transmission. A faulty PCM can cause erratic shifting or prevent shifting altogether.
What to do:
1. Check the transmission fluid: This is the easiest and cheapest thing to check first.
2. Have a professional diagnose the problem: Unless you're experienced with automotive repair, it's best to take your Tempo to a mechanic or transmission specialist. They have the tools and expertise to properly diagnose the issue and recommend the necessary repairs. A simple visual inspection and fluid check might not reveal the underlying problem.
Don't continue driving the car with severe shifting problems, as you could cause further damage to the transmission.
