Here are some more likely culprits:
* Low Transmission Fluid: Low fluid level is a major contributor to hard shifting and damage. Check your transmission fluid level immediately. If it's low, you need to find out *why* it's low – a leak is a serious problem.
* Worn Transmission Clutches or Bands: These components wear down over time, leading to harsh engagement and slipping (high RPMs). This is a common issue in higher-mileage trucks.
* Problems with the Valve Body: The valve body controls the shifting and fluid pressure within the transmission. Internal problems in the valve body can cause erratic shifting behavior.
* Solenoids: These electromagnetic valves within the transmission control fluid flow. A faulty solenoid can cause various shifting problems.
* Torque Converter: The torque converter acts as a clutch between the engine and transmission. A faulty torque converter can cause slipping and high RPMs.
* Governor Pressure Sensor/Solenoid: This sensor regulates transmission shift points. A malfunctioning sensor can lead to incorrect shift timing.
What you should do:
1. Check the transmission fluid level and condition: This is the first and most important step. The fluid should be bright red (or the appropriate color for your transmission fluid type). Dark, burnt-smelling fluid indicates serious problems.
2. Have a professional diagnose the problem: Given the severity of the symptoms, taking it to a transmission specialist or a reputable mechanic is crucial. They have the tools and expertise to properly diagnose the issue and recommend the necessary repairs. A simple fluid change and filter replacement won't fix the underlying problem if it's something more serious.
Ignoring the problem will likely lead to more extensive (and expensive) damage to your transmission. Get it checked out soon.
