GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Tahoe - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Shift Speed

Shift Speed - 5.3L and 4.8L, 3.42:1 Final Drive

5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.42:1 Final Drive

Percent Throttle

Trans Cal.

12.5

25

50

75

100

Normal (Default)

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

1-2 Upshift

18

11.1

25

15.5

45

28.0

58

36.0

62

38.5

2-3 Upshift

31.5

19.5

41

25.5

75

46.6

102

63.4

--

--

3-4 Upshift

44

27

62

38.5

114

70.8

--

--

--

--

2-1 Down Shift

13.5

8.4

13.5

8.4

13.5

8.4

13.5

8.4

52

32.3

3-2 Down Shift

26.5

16.5

30

18.6

44

27.3

67

41.6

122

75.8

4-3 Down Shift

38

23.6

41

25.5

71

44.1

121

75.2

--

--

TCC Apply 4th Gear

66

41.0

73

45.4

--

--

--

--

--

--

GMT 900 5.3L/4.8L 4L60-E (M30)

N/V = 23.20


Shift Speed - 5.3L and 4.8L, 4.10:1 Final Drive

5.3L (LY5, LMG, LC9) 4.8L (LY2) 4.10:1 Final Drive

Percent Throttle

Trans Cal.

12.5

25

50

75

100

Normal (Default)

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

1-2 Upshift

16

9.9

21.5

13.4

38

23.6

51

31.7

53

32.9

2-3 Upshift

26

16.2

35

21.7

64

39.8

89

55.3

106

65.9

3-4 Upshift

37

23.0

52

32.3

97

60.3

--

--

--

--

2-1 Down Shift

12

7.5

12

7.5

12

7.5

12

7.5

45

28.0

3-2 Down Shift

22

13.7

25

15.5

37

23.0

56

34.8

102

63.4

4-3 Down Shift

32

19.9

37

23.0

67

41.6

103

64.0

--

--

TCC Apply 4th Gear

55

34.2

61

37.9

118

73.3

121

75.2

121

75.2

GMT 900 5.3L/4.8L 4L60-E (M30)

N/V = 27.81


Shift Speed - 5.3L and 4.8L, 3.23:1 Final Drive

5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.23:1 Final Drive

Percent Throttle

Trans Cal.

12.5

25

50

75

100

Normal (Default)

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

1-2 Upshift

19

11.8

26.4

16.4

47.6

29.5

61.4

38.1

69.2

39.8

2-3 Upshift

33.3

20.6

43.4

26.9

77.7

48.2

108

67.1

--

--

3-4 Upshift

46.5

28.8

65.6

40.7

120.7

74.9

--

--

--

--

2-1 Down Shift

14.2

8.8

14.2

8.8

14.2

8.8

14.2

8.4

55

34.1

3-2 Down Shift

28

17.3

31.7

19.6

46.5

28.8

70.9

44

--

--

4-3 Down Shift

40.2

24.9

43.4

26.9

75

46.6

--

--

--

--

TCC Apply 4th Gear

69

42.8

77.2

47.9

--

--

--

--

--

--

GMT 900 5.3L/4.8L 4L60-E (M30)


Shift Speed - 5.3L and 4.8L, 3.73:1 Final Drive

5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.73:1 Final Drive

Percent Throttle

Trans Cal.

12.5

25

50

75

100

Normal (Default)

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

1-2 Upshift

17.5

10.8

23.6

14.6

41.7

25.9

56

34.7

58.2

36.1

2-3 Upshift

28.5

17.7

38.4

23.8

70

43.4

110.5

68.6

116.5

72.3

3-4 Upshift

40.6

25.2

57.1

35.4

106.6

66.2

--

--

--

--

2-1 Down Shift

13

8

13

8

13

8

13

8

49.4

30.6

3-2 Down Shift

24.1

14.9

27.4

17

40.6

25.2

61.5

38.2

112.1

69.6

4-3 Down Shift

35.1

21.8

40.6

25.2

73.6

45.7

113.2

70.0

--

--

TCC Apply 4th Gear

60.4

37.5

67

41.6

--

--

--

--

--

--

GMT 900 5.3L/4.8L 4L60-E (M30)


Shift Speed - 6.0L, 4.10:1 Final Drive

6.0L (L76) 4.10:1 Final Drive

Percent Throttle

Trans Cal.

12.5

25

50

75

100

Normal (Default)

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

Km/h

mph

1-2 Upshift

17.3

10.7

23.9

14.8

47.3

29.3

59.5

37

63.6

39.5

2-3 Upshift

28

17.3

40

24.8

73.6

45.7

100.2

62.2

107.0

66.5

3-4 Upshift

39.3

24.4

54.5

33.8

106

65.8

--

--

--

--

2-1 Down Shift

11.5

7.1

11.5

7.1

11.5

7.1

11.5

7.1

53.1

33

3-2 Down Shift

20

12.4

20

12.4

39.4

24.5

62.7

39

100.5

62.4

4-3 Down Shift

33

20

33

20

65.1

40.4

123.1

76.5

--

--

TCC Apply 4th Gear

57.9

36

66.7

41

120.6

74.9

120.6

74.9

120.6

74.9

GMT 900 GMT 931 6.0L (L76) 4L70-E (M70)