Hydraulic Pressure Test Specifications; Hydraulic Pressure Test Diagnosis - Jeep J-10 Series 1982 Technical & Service Manual

AUTOMATIC TRANSMISSION 2C-21
SPECIFICATIONS
Hydraulic Pressure Test Specifications
Lube Pressure Closed throttle
Full throttle
5-30 psi (34-207 kPa)
5-30 psi (34-207 kPa)
Line Pressure Closed throttle
1000 rpm
54-60 psi (372-414 kPa)
57-94 psi (393-648 kPa)
Front Servo Release
Third gear only
No more than 3 psi (21 kPa) lower than line pressure
Rear Servo Apply 1 Range
R Range
No more than 3 psi (21 kPa) lower than line pressure
160 psi (1103 kPa) at idle, builds to 270 psi (1862 kPa) at 1600 RPM.
Governor
0 Range
Closed throttle
Pressure should respond smoothly to changes in MPH and return to
0 to 1-1/2 PSI (0-7 kPa) when stopped with transmission in D, 1, 2.
Pressure above 1-1/2 PSI (7 kPa) at standstill will prevent transmission
from downshifting.
70125
Hydraulic Pressure Test Diagnosis
Condition
Indication
Line pressure OK during any one test
Pump and regulator valve OK
Line pressure OK in R but low in D, 2,1
Leakage in rear clutch area (servo, clutch seals,
governor support seal rings)
Pressure OK in 1, 2 but low in D3 and R
Leakage in front clutch area (servo, clutch seals,
retainer bore, pump seal rings)
Pressure OK in 2 but low in R and 1
Leakage in rear servo
Front servo pressure in 2
Leakage in servo; broken servo ring or cracked
servo piston
Pressure low in all positions
Clogged filter, stuck pressure regulator valve, worn
or defective pump
Governor pressure high at idle (over 0 to 1-1/2 psi)
Governor valve sticking open
Governor pressure zero or below specifications at
all mph figures
Governor valve sticking in closed position
Lubrication pressure low at all throttle positions
Clogged oil cooler or lines, seal rings leaking, out
put shaft plugged with debris, worn bushings in
pump or clutch retainer
70126