Home
Back
Slip Formula:
| From: | To: |
Torque converter slippage refers to the difference between engine RPM and transmission input RPM in an automatic transmission vehicle. It's a normal characteristic of torque converter operation but excessive slippage can indicate problems.
The calculator uses the slip formula:
Where:
Explanation: The formula calculates the percentage difference between engine speed and transmission input speed, expressed as a decimal value that is typically converted to a percentage.
Details: Monitoring torque converter slippage is important for diagnosing transmission issues, assessing transmission health, and determining when maintenance or repair is needed. Excessive slippage can lead to reduced fuel efficiency and transmission damage.
Tips: Enter both engine RPM and transmission RPM values. Engine RPM should be greater than or equal to transmission RPM. Values must be positive numbers.
Q1: What is considered normal torque converter slippage?
A: Normal slippage is typically 5-10% under load. Higher values may indicate worn components or other transmission issues.
Q2: When should I be concerned about slippage?
A: If slippage exceeds 15-20% under normal driving conditions, or if you notice a significant increase over time, it's worth having your transmission inspected.
Q3: How do I measure transmission RPM?
A: Transmission input RPM can be measured using a diagnostic scanner that can read transmission data, or in some vehicles through the OBD-II port with appropriate software.
Q4: Can high slippage damage my transmission?
A: Yes, excessive slippage generates heat and can lead to accelerated wear of transmission components and fluid breakdown.
Q5: Does slippage vary with vehicle speed?
A: Yes, slippage is typically highest at lower speeds and should decrease as the torque converter locks up at higher speeds in most modern vehicles.