GM Service Manual Online
For 1990-2009 cars

Hydra-Matic 4T60-E Shift Speed Chart

Transmission Model

8YAW

Vehicle Series

U

Engine Displacement

3.4L

Engine RPO Code

LA1

Engine VIN Code

E

Overall Axle Ratio

3.29

Final Drive Ratio

3.29

Drive/Driven Sprocket Teeth

35/35

Minimum Throttle 1-2 Upshift

17.7 KM/H (11 MPH)

Wide Open Throttle 1-2 Upshift

64.4 KM/H (40 MPH)

Minimum Throttle 2-3 Upshift

32.2 KM/H (20 MPH)

Wide Open Throttle 2-3 Upshift

130.3 KM/H (81 MPH)

Minimum Throttle 3-4 Upshift

62.7 KM/H (39 MPH)

Wide Open Throttle 3-4 Upshift

N/A

Minimum TCC Apply--Third Gear

40.2 KM/H (25 MPH)

Minimum TCC Apply--Fourth Gear

62.7 KM/H (39 MPH)

N/V Ratio--Third Gear/TCC On

69.2 KM/H (43 MPH)

N/V Ratio--Fourth Gear/TCC On

67.6 KM/H (42 MPH)

  • N/V Ratio = Engine RPM to Vehicle Speed Ratio
  • N/A = Not Available