* Low Transmission Fluid: This is the most common and easiest to check. Low fluid level leads to insufficient lubrication and cooling, causing slippage. Check the fluid level with the engine running and warmed up (following the dipstick instructions carefully). Also, inspect the fluid's condition – it should be bright red and clear; dark, burnt fluid indicates problems.
* Contaminated Transmission Fluid: Even with sufficient fluid, if it's dirty or contains debris, it can't properly lubricate the transmission components, leading to slippage.
* Worn Clutch Packs: The clutch packs are responsible for engaging and disengaging the gears. Wear and tear from age and mileage can cause them to slip. This is a more serious internal problem.
* Worn Transmission Bands: Similar to clutch packs, worn transmission bands prevent proper engagement of gears.
* Low/Failing Transmission Pressure: The transmission relies on hydraulic pressure to shift gears. A low pressure condition, often caused by a faulty pump or solenoid, results in slippage.
* Failing Solenoids or Valves: These are electronic components within the transmission that control fluid flow. A malfunctioning solenoid can cause incorrect gear selection and slippage.
* Worn or Damaged Planetary Gears: These gears are internal components that transfer power. Damage or wear can lead to slippage.
* Torque Converter Issues: The torque converter acts as a fluid coupling between the engine and transmission. Problems with it, such as wear or internal damage, can cause slippage.
* Incorrectly Adjusted Linkage (for manual transmissions): While less common in Blazers of this year (which usually have automatics), if it's a manual, incorrect linkage adjustment can lead to slippage.
In short: The slipping transmission is a serious issue that requires professional diagnosis. Simply adding fluid might temporarily mask the problem, but won't solve the underlying cause. Take it to a qualified mechanic or transmission specialist for a proper inspection and repair. Ignoring the problem could lead to significant and costly damage to the transmission.
