Jeep Grand Cherokee '95 6-cyl in line 2x4
2006-12-27 06:32:08 · 4 answers · asked by YoMerito 1 in Cars & Transportation ➔ Maintenance & Repairs
This is a very difficult problem to diagnose without a scan tool and a set of pressure gauges. The Overdrive is controlled by the engine computer and uses several computer inputs in order to allow Overdrive. The computer must see proper engine operating temperature, proper vehicle speed, proper transmission output shaft speed, and the correct Governor Pressure (from the sensor). IF all the values mentioned above are within the computer's specs, the computer will command the Overdrive solenoid to engage, and apply pressure to the Overdrive piston and engage the O/D clutch pack. That's the electrical side of possibilities. You could also have a "burnt-up" Overdrive clutch pack, or a defective piston seal, so the O/D may be engaging electrically, but not mechanically.
I know this is probably not what you want to hear, but I would recommend taking the vehicle to a reputable Transmission shop and let them diagnose it. That way they can determine if you have an electrical problem (scan tool) or a hydraulic/mechanical problem (pressure gauges). This is a fairly complex system, and without the proper tools, almost impossible to diagnose. HTH!! Good Luck!
2006-12-27 08:36:53 · answer #1 · answered by lugnutz59 5 · 0⤊ 0⤋
It depends on your model. I have a wrangler that I thought had an overdrive until I found out that it was the Converter lock. This solenoid locks up the converter so you have a 1:1 link between engine and trans. THis acts as a sort of overdrive. It should come on after third gear and unlock if you let your foot off of the accelerator, or step on the brake pedal. If you are having trouble with this lock-up take it to your nearest transmission shop and have it serviced. The biggest enemies of an automatic transmission are heat and debris. You should have it serviced every 12000 miles.
A shift kit and valve rebuild would be an economical way to deal with it. Just remember that this is a computer controlled system so you may have a computer malfunction. Have your local shop hook it up and check the codes to see what you are dealing with first. Most reputable shops will apply this cost to any repairs needed
2006-12-27 15:14:59 · answer #2 · answered by jake622003 2 · 0⤊ 0⤋
The net blows. Go to Auto Zone and buy a Haynes manual for $15. It will have the info you need, how to fix it. plus everything else you'll ever want to know, and step by step instructions.
2006-12-27 14:34:49 · answer #3 · answered by Anonymous · 1⤊ 0⤋
this is a good one try it and see if it works
your local jeep sales store....
2006-12-27 14:38:30 · answer #4 · answered by red 3 · 0⤊ 0⤋