1. What is Torque Converter Slippage?

Torque converter slippage occurs when there's a difference between the engine speed (RPM) and turbine speed (RPM) in an automatic transmission. Some slippage is normal, but excessive slippage can indicate problems with the torque converter.

2. How Does the Calculator Work?

The calculator uses the slippage formula:

Where:

• Engine RPM — Rotations per minute of the engine crankshaft
• Turbine RPM — Rotations per minute of the transmission input shaft

Explanation: The formula calculates what percentage of the engine's rotational speed is not being transferred to the transmission.

3. Importance of Slippage Calculation

Details: Monitoring torque converter slippage helps diagnose transmission problems. Normal operation typically shows 5-10% slippage, while values over 15% may indicate issues.

4. Using the Calculator

Tips: Enter both engine RPM (tachometer reading) and turbine RPM (measured via scan tool or transmission sensor). Both values must be measured at the same time under load.

5. Frequently Asked Questions (FAQ)

Q1: What is normal torque converter slippage?
A: Typically 5-10% during normal operation. Higher during acceleration and lower at steady speeds.

Q2: When should I be concerned about slippage?
A: If slippage exceeds 15% at cruise speeds or if you notice performance issues like delayed engagement or overheating.

Q3: How is turbine RPM measured?
A: Through the transmission input speed sensor, usually read via OBD-II scan tool or professional diagnostic equipment.

Q4: Can zero slippage be bad?
A: Yes, a locked torque converter should show near-zero slippage, but constant zero slippage when unlocked may indicate a stuck clutch.

Q5: Does slippage affect fuel economy?
A: Yes, excessive slippage converts engine power to heat rather than motion, reducing efficiency.