GM Service Manual Online
For 1990-2009 cars only

Hydra-Matic 4T60-E Shift Speed Chart

Transmission Model

6PKW

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

9

Wide Open Throttle 1-2 Upshift

40

Minimum Throttle 2-3 Upshift

19

Wide Open Throttle 2-3 Upshift

75

Minimum Throttle 3-4 Upshift

28

Wide Open Throttle 3-4 Upshift

N/A

Minimum TCC Apply - Third Gear

N/A

Minimum TCC Apply - Fourth Gear

40

N/V Ratio - Third Gear/TCC On

44

N/V Ratio - Fourth Gear/TCC On

31

  • N/V Ratio = Engine RPM to Vehicle Speed Ratio
  • N/A = Not Available
  • Speeds are indicated in Miles Per Hour (MPH). MPH = Km/h x 1.609