Torque converter wont disengage at stop light
10-19-2012, 09:20 AM
#1
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Torque converter wont disengage at stop light
Hi all new here. Have a question, I have a 1994 Jeep Grand Cherokee 5.2L AWD. Transmission shifts fine except when I come to a complete stop the rpms keep dropping and if I shift to N then back to drive everything works again. Its like the torque converter is not disengaging or something. Any help would be great... Thanks Clint
10-19-2012, 09:51 AM
#2
CF Veteran
Join Date: Mar 2009
Location: Tenn. and Mich.
Posts: 28,068
Likes: 0
Received 6 Likes
on
6 Posts
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Welcome to CF.
I'm not a trans expert, so I looked at the ZJ FSM, and copied the following to see if it applies, or could be of help.
DRAGS OR LOCKS UP
1. Fluid Level Low. 1. Check and adjust level.
2. Clutch Dragging/Failed 2. Air pressure check clutch operation
and repair as required.
3. Front or Rear Band Misadjusted. 3. Adjust bands.
4. Case Leaks Internally. 4. Check for leakage between passages
in case.
5. Servo Band or Linkage Malfunction. 5. Air pressure check servo operation
and repair as required.
6. Overrunning Clutch Worn. 6. Remove and inspect clutch. Repair as
required.
7. Planetary Gears Broken. 7. Remove, inspect and repair as
required (look for debris in oil pan).
8. Converter Clutch Dragging. 8. Check for plugged cooler. Perform
flow check. Inspect pump for excessive
side clearance. Replace pump as
required.
TORQUE CONVERTER LOCKS UP
IN SECOND AND/OR THIRD GEAR
Lockup Solenoid, Relay or Wiring
Shorted/Open. Test solenoid, relay and wiring for
continuity, shorts or grounds. Replace
solenoid and relay if faulty. Repair wiring
and connectors as necessary.
I'm not a trans expert, so I looked at the ZJ FSM, and copied the following to see if it applies, or could be of help.
DRAGS OR LOCKS UP
1. Fluid Level Low. 1. Check and adjust level.
2. Clutch Dragging/Failed 2. Air pressure check clutch operation
and repair as required.
3. Front or Rear Band Misadjusted. 3. Adjust bands.
4. Case Leaks Internally. 4. Check for leakage between passages
in case.
5. Servo Band or Linkage Malfunction. 5. Air pressure check servo operation
and repair as required.
6. Overrunning Clutch Worn. 6. Remove and inspect clutch. Repair as
required.
7. Planetary Gears Broken. 7. Remove, inspect and repair as
required (look for debris in oil pan).
8. Converter Clutch Dragging. 8. Check for plugged cooler. Perform
flow check. Inspect pump for excessive
side clearance. Replace pump as
required.
TORQUE CONVERTER LOCKS UP
IN SECOND AND/OR THIRD GEAR
Lockup Solenoid, Relay or Wiring
Shorted/Open. Test solenoid, relay and wiring for
continuity, shorts or grounds. Replace
solenoid and relay if faulty. Repair wiring
and connectors as necessary.
10-19-2012, 04:12 PM
#5
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Is that the same as a brake light switch? If so my brake lights work fine is there some wire from this switch going to the transmission? Can I test with a ohm meter?
10-19-2012, 04:16 PM
#6
CF Veteran
Join Date: Feb 2010
Location: Oroville, CA
Posts: 12,367
Likes: 0
Received 19 Likes
on
18 Posts
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
The stop light switch turns the brake lights on, shut off the cruise control, and tells the ECM to unlock the torque converter. There are about seven wires that go to and come out of the switch.
10-19-2012, 05:58 PM
#7
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Yes i found them there were 6 now what do i do with them? If it were yours what would you do to test fix the problem? One other thing I noticed was it was having problems down shifting. When I gave it gas it would down shift to the proper gear and move on otherwise it would stay in the higher gear and just bog along. I would have to push the gas about half way and it would down shift and get up and go.
Trending Topics
10-19-2012, 09:41 PM
#8
CF Veteran
Join Date: Feb 2010
Location: Oroville, CA
Posts: 12,367
Likes: 0
Received 19 Likes
on
18 Posts
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
I wouldn't waste my time testing the old one, I would just replace it. But you're not sure if that is the problem or not. I suggest having a transmission shop check it out.
10-26-2012, 05:07 PM
#10
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Thread
Thread Starter
Forum
Replies
Last Post
96Co
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
01-10-2024 06:17 AM
australian_expat
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
09-02-2015 09:02 PM
Montana5991
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
09-02-2015 09:23 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
