Shift Speeds & Governor Pressures

CLUTCH & BAND COMPONENT APPLICATION ⁽¹⁾

Lever Position

Front Clutch

Rear Clutch

Overrun Clutch

Lock-up Clutch

Front Band

Low-R Band

Drive (1st)

.....

Drive (2nd)

.....

Drive (3rd)

.....

2nd (1st)

.....

2nd (2nd)

.....

1-1st Hold

.....

Reverse

.....

⁽¹⁾	Neutral/Park: All clutches/bands released and/or ineffective.

NOTE: For shift speeds and governor pressures in trucks and vans, see Fig 1 .

SHIFT SPEEDS & GOVERNOR PRESSURES - CHRYSLER PASSENGER CARS

Application/Shift

⁽¹⁾ 2.26 Axle Ratio (MPH)

⁽¹⁾ 2.94 Axle Ratio (MPH)

Throttle Closed

1-2 Upshift

12-15

9-11

2-3 Upshift

16-20

13-16

Lock-Up

38-53

30-41

Throttle Wide Open

1-2 Upshift

37-56

31-43

2-3 Upshift

75-93

58-72

Kickdown Range

3-2 Downshift

69-87

54-67

3-1 Downshift

35-40

27-31

Governor Pressure ⁽²⁾

15 psi

23-25

17-20

50 psi

51-59

39-45

75 psi

78-85

60-66

⁽¹⁾	With standard tire size P205/75R15.

⁽²⁾	Governor pressure should be from zero to 1.5 psi at stand-still or downshift may not occur.

Fig 1: Shift Speeds & Governor Pressures - Chrysler Motors Trucks & Vans

Courtesy of CHRYSLER CORP.

Slipping or flare-up in any gear usually indicates clutch, band or overrunning clutch problems. To determine which clutch or band slipping, note transmission operation in all selector positions while comparing which internal units are applied in each position.
If transmission slips in high gear with selector lever in "D", either front or rear clutch is slipping. By selecting another gear which uses one but not both of these assemblies, unit which is slipping can be identified. If transmission also slips in Reverse, front clutch is slipping. If transmission does not also slip in Reverse, rear clutch is slipping.
Although this process of elimination can be used to detect any unit which slips and to confirm proper operation of good units, actual cause usually cannot be determined. Nearly any condition can be caused by leaking hydraulic circuits or sticking valves.
Unless obvious condition exists, transmission should never be disassembled until hydraulic and air pressure tests have been performed. Using engine tachometer, determine if lock-up clutch in converter is functioning.
Instantaneous rise in engine speed of more than 150 RPM at 45 MPH when throttle is opened just short of kickdown, indicates lock-up clutch is slipping more than normal. Slippage less than 150 RPM is normal.