Lockup Torque Converter Service Diagnosis - Jeep J-10 Series 1982 Technical & Service Manual

2C-22 AUTOMATIC TRANSMISSION
Lockup Torque Converter Service Diagnosis
Condition
Possible Cause
Correction
NO LOCKUP
(1) Faulty oil pump. (1) Replace oil pump.
(2) Sticking governor valve.
(2) Repair or replace as necessary.
(3) Valve body malfunction,
(a) Stuck switch valve.
(3) Repair or replace valve body
or its internal components as
necessary.
(b) Stuck lockup valve.
(c) Stuck fail-safe valve.
(4) Faulty torque converter.
(4) Replace torque converter.
(5) Failed locking clutch. (5) Replace torque converter.
(6) Leaking turbine hub seal. (6) Replace torque converter.
(7) Faulty input shaft or seal ring.
(7) Repair or replace as necessary.
WILL NOT UNLOCK (1) Sticking governor valve.
(1) Repair or replace as necessary.
(2) Valve body malfunction,
(a) Stuck switch valve.
(2) Repair or replace valve body
or its internal components
as necessary.
(b) Stuck lockup valve.
(c) Stuck fail-safe valve.
STAYS LOCKED UP
AT TOO LOW A
(1) Sticking governor valve. (1) Repair or replace as necessary.
SPEED IN DIRECT
(2) Valve body malfunction.
(a) Stuck switch valve.
(b) Stuck lockup valve.
(c) Stuck fail-safe valve.
(2) Repair or replace valve body
or its internal components
as necessary.
LOCKS UP OR
DRAGS IN LOW
(1) Faulty oil pump.
(1) Replace oil pump.
OR SECOND
(2) Valve body malfunction.
(a) Stuck switch valve.
(b) Stuck fail-safe valve.
(2) Repair or replace valve body
or its internal components
as necessary.
SLUGGISH OR
STALLS IN
(1) Faulty oil pump.
(1) Replace oil pump as necessary.
REVERSE
(2) Plugged cooler, cooler lines
or fittings.
(2) Flush or replace cooler and
flush lines and fittings.
(3) Valve body malfunction,
(a) Stuck switch valve.
(3) Repair or replace valve body
or its internal components
as necessary.
(b) Faulty input shaft or seal ring.
81127A