4T60 & 4T60-E Automatic Transaxle

CAUTION:

The shift speed charts have been updated to reference THROTTLE ANGLE or (TPS) data instead of "min throttle" or "WOT" to make shift speed measurement more uniform and accurate. A scan tool is necessary to monitor THROTTLE ANGLE.

Some scan tools have been programmed to measure and record shift point information. Check the instruction manual to see if this test is available.

This test should only be performed when traffic and road conditions permit.

Observe all traffic safety regulations.

ROAD TEST PROCEDURE

Perform the road test following the sequence given with a TECH 1 or other scan tool.

Mph (km/h) shift points will vary with actual throttle position and driver habits.

Compare the results of the test with speed shift chart information.


With gear selector in "Overdrive" (D4):

1. Look at the shift speed chart and choose a percent throttle angle of 15 or 20.

2. Set up the scan tool to monitor THROTTLE ANGLE and VEHICLE SPEED.

3. Accelerate to the chosen throttle angle and hold the throttle steady.

4. As the transmission upshifts, note the shift speed for:
^ 2nd gear.
^ 3rd gear.
^ 4th gear.