d. Driving Transmission Stall Test.
NOTE: If the vehicle is equipped with a smoke controlled or an
emission controlled engine or engine control programming inhibiting
engine acceleration, the following stall test procedure can be used.
WARNING: To help avoid personal injury and/or equipment damage, a
driving transmission stall test must be performed by a trained driver
and a qualified technician.
e. Driving Transmission Stall Test Preparation. If a driving transmission stall
test is to be performed, make sure the following preparations have been made
before conducting the test.
1. The manufacturer concurs with performing a full-throttle transmission stall
test.
2. The engine programmable parameter for 0 rpm transmission output speed is
set higher than the value expected at transmission stall speed.
3. The vehicle is in an area in which the transmission stall test can be safely
performed.
4. Make sure the fuel control linkage goes to full throttle and does not stick
when released.
5. Inspect the engine air induction system and exhaust system to make sure
there are no restrictions.
6. Determine the cold transmission fluid level and adjust as necessary.
7. Connect the Allison DOC™ service tool to the vehicle diagnostic data
connector.
8. Install an accurate tachometer (do not rely on the vehicle tachometer).
9. Install a temperature gauge with the probe in the transmission converter-out
(to cooler) hose. Allison DOC™ displays sump temperature only.
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