GM Service Manual Online
For 1990-2009 cars only

Shift Speed Table (1999 N-Car/GMX130 4T40-E/45E)

 

1-2 Shift @ +/- 3 mph

2-3 Shift @ +/- 4 mph

3-4 Shift @ +/- 5 mph

Downshifts @ +/- 4 mph

TCC Apply 4th Gear

% of TPS

10

25

50

10

25

50

10

25

50

4-3 Coast

3-2 Coast

2-1 Coast

10%

Model

Engine RPO

    

WXJ

LA1

12

19

30

24

36

56

38

53

90

36

14

8

38

MXJ

(GT)

LA1

12

17

28

19

34

52

35

49

97

34

14

8

35

WHR

LD9

10

19

31

23

35

57

40

56

95

35

17

8

43