h. Transmission Stall Test Results.
NOTE: Environmental conditions, such as ambient temperature,
altitude, engine accessory loss variations, etc., affect the power input to
the converter. Due to such conditions, stall speed can vary from
specification by ±150 rpm and still be accepted as within published stall
speed.
• If engine speed with the transmission stalled is more than 150 rpm below
the stall speed specification an engine issue is indicated.
• If engine stall speed is more than 150 rpm above specification, a
transmission issue is indicated.
• Conditions that can exist to cause stall speed to 150 rpm above specification
could be:
— Transmission fluid cavitation or aeration. Verify proper fluid level
using the oil level sensor, if equipped or dipstick.
— Slipping clutch.
— Torque converter malfunction.
— Sticking or damaged torque converter valve.
• A low stall speed (at least 33 percent lower than published stall speed)
could indicate an engine issue or a freewheeling stator in the torque
converter.
50
To Next Page
Loading...
