* Low Transmission Fluid: This is the most common and often easiest to check. Low fluid level indicates a leak or internal problem, causing the transmission to overheat and malfunction, leading to erratic shifting and potentially sticking in a gear. Check your fluid level immediately – it should be checked when the engine is running and warm, and the level should be within the range indicated on the dipstick. Never add fluid if the level is already at or above the "full" mark. This could damage the transmission further.
* Transmission Fluid Contamination: Contaminated fluid (burned, dirty, or mixed with other fluids) will not lubricate properly, leading to friction, slippage, and eventual failure. This often results in harsh shifting and gear sticking.
* Internal Transmission Problems: This is the most likely and serious cause. Several internal components could be failing, including:
* Worn clutches or bands: These components transfer power, and wear causes slippage and inability to properly engage gears.
* Damaged valve body: The valve body controls the hydraulics within the transmission, and a malfunction can cause erratic shifting or gear sticking.
* Broken or worn planetary gears: These gears are crucial for gear ratios, and damage will significantly disrupt shifting.
* Torque converter issues: The torque converter connects the engine to the transmission. Problems can lead to slipping and difficulties engaging gears.
* Transmission Control Module (TCM) problems: The TCM is the computer that controls the transmission. A faulty TCM can cause incorrect shifting commands.
* Solenoid problems: These electro-mechanical valves regulate fluid flow within the transmission. A sticking or faulty solenoid can lead to improper gear selections.
* Throttle Position Sensor (TPS) Issues: A faulty TPS can send incorrect signals to the TCM, leading to inappropriate transmission responses, including downshifting and sticking.
* Speed Sensor Issues: Inaccurate speed readings to the TCM can also cause improper shifting. There may be multiple speed sensors related to the transmission's function.
What you should NOT do:
* Continue driving: Driving with a malfunctioning transmission could cause catastrophic damage and costly repairs.
* Add transmission fluid without knowing the cause: Overfilling can cause as much damage as underfilling.
What you SHOULD do:
1. Check the transmission fluid level and condition: This is the simplest thing to check first. If it's low or dirty, it strongly indicates a problem that needs attention.
2. Have it professionally diagnosed: Take your Cirrus to a qualified mechanic or transmission specialist for a proper diagnosis. They have the tools and expertise to determine the precise cause of the problem. Trying to fix this yourself without the necessary knowledge and tools is strongly discouraged. The cost of a proper diagnosis will save you money in the long run, as it will prevent potentially costly mistakes.
Ignoring the problem will almost certainly lead to more extensive and expensive repairs down the line. Addressing it promptly increases the chances of a more affordable fix.
