TH350 transmission oil capacity
The Turbo Hydra-Matic 350 has served for decades in GM cars and trucks, but its lubricant requirement often confuses owners during a fluid and filter change. Because pan depth and cooler routing vary by equipment, a published fill figure can mislead a first-time service. Understanding the TH350 transmission oil capacity means interpreting that number as a baseline service amount, not the only value that matters. The final confirmation always comes from a warm level check on level ground.
Essential answer
The commonly cited TH350 transmission oil capacity for a routine pan drop and filter replacement is roughly a service fill amount, often around a few quarts, but the exact number shifts with pan depth and torque converter drainage. Stock shallow pans hold less fluid than deep aftermarket pans, and leaving the converter full during a pan service means the case only receives the fluid lost from the sump. For that reason, no single figure can represent every installation without qualification.
A dry-fill figure, which approximates the total lubricant in the converter, case, and cooler circuit, is substantially higher than a pan service fill. The TH350 uses more fluid when the torque converter has been drained or replaced. Because the goal is correct operation rather than merely reaching a printed fill quantity, the essential answer is that owners should identify which equipment is present, add a cautious baseline amount, and then confirm the proper level with the dipstick while the transmission is warm and the engine idles in Park.
