diff --git a/src/vehicles/Transmission.cpp b/src/vehicles/Transmission.cpp
index 1aeabfe0..1dff2b30 100644
--- a/src/vehicles/Transmission.cpp
+++ b/src/vehicles/Transmission.cpp
@@ -55,6 +55,8 @@ cTransmission::CalculateGearForSimpleCar(float speed, uint8 &gear)
 	}
 }
 
+/* This function causes 'pulsing' of throttle when reversing at max speed.  You
+ * can most easily observe this when the framelimiter is enabled.*/
 float
 cTransmission::CalculateDriveAcceleration(const float &gasPedal, uint8 &gear, float &time, const float &velocity, bool cheat)
 {