GM Service Manual Online
For 1990-2009 cars only
Table 1: Shift Speed
Table 2: Downshift Speed

Shift Speed

Model

1-2 shift : mph (km/h)

2-3 Shift : mph (km/h)

3-4 Shift : mph (km/h)

4-5 Shift : mph (km/h)

Trans RPO

Engine RPO

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

M98

LD9

12 (19)

12 (20)

19 (31)

19 (31)

21 (33)

33 (53)

29 (46)

30 (48)

46 (74)

37 (60)

32 (52)

37 (60)

M98

LU1

9 (14)

10 (16)

19 (30)

17 (27)

18 (29)

28 (45)

26 (42)

27 (44)

39 (62)

35 (56)

37 (59)

53 (86)

M98

LLW

11 (18)

11 (18)

14 (22)

19 (30)

19 (30)

25(41)

37 (60)

37 (60)

41 (66)

52 (83)

52 (83)

55 (89)

M98

LMN

11 (18)

11 (18)

14 (22)

19 (30)

19 (30)

25(41)

37 (60)

37 (60)

41 (66)

52 (83)

52 (83)

55 (89)


Downshift Speed

Model

5-4 shift : mph (km/h)

4-3 shift : mph (km/h)

3-2 shift : mph (km/h)

2-1 shift : mph (km/h)

4th gear Min TCC Apply: mph (km/h)

5th gear Min TCC Apply: mph (km/h)

Trans RPO

Engine RPO

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

10% TP

25% TP

50% TP

M98

LD9

32 (52)

32 (52)

37 (60)

24 (38)

24 (38)

25 (40)

15 (24)

15 (24)

15 (24)

6 (9)

6 (9)

6 (9)

92 (148)

61 (98)

M98

LU1

29 (46)

29 (46)

35 (57)

21 (34)

21 (34)

23 (37)

12 (20)

12 (20)

14 (22)

6 (9)

6 (9)

6 (9)

35 (52)

45 (72)

M98

LLW

48 (77)

48 (77)

48 (77)

34 (55)

34 (55)

34 (55)

15 (24)

15 (24)

15 (24)

5 (8)

5 (8)

5 (8)

42 (68)

61 (98)

M98

LMN

48 (77)

48 (77)

48 (77)

34 (55)

34 (55)

34 (55)

15 (24)

15 (24)

15 (24)

5 (8)

5 (8)

5 (8)

42 (68)

61 (98)