You'll need to determine which transmission is in your Impala. Look for a tag on the transmission itself (often on the side or top) or check your owner's manual (if you have one). Common transmissions for that year and engine include:
* Turbo Hydra-Matic 350 (TH350): This is a very common automatic. Capacity is typically around 10-12 quarts. However, a complete fill might require more as some remains in the torque converter.
* Turbo Hydra-Matic 400 (TH400): Another common automatic, generally holding slightly more fluid. Expect a capacity of approximately 12-14 quarts. Again, this is an approximate amount.
* Powerglide: A less common automatic in that era but possible. The capacity would be considerably less, typically around 4-6 quarts.
* Manual Transmissions (3-speed or 4-speed): Manual transmissions use gear oil, not transmission fluid, and the capacities vary considerably depending on the specific transmission.
To find the correct capacity:
1. Identify your transmission: This is the most crucial step.
2. Consult a repair manual: A Haynes or Chilton repair manual for your specific year and model Impala will list the precise transmission fluid capacity for your vehicle.
3. Check online resources: Websites like YearOne or other classic car parts suppliers might have specifications.
Without knowing the transmission type, giving a precise fluid capacity is impossible. The ranges above are estimates, and using them could lead to overfilling or underfilling your transmission, which is damaging. Be sure to identify your transmission type before adding any fluid.
