What does overdrive do on a Jeep Grand Cherokee?
Overdrive means that for every revolution of the engine, the wheels will turn greater than one revolution. This allows for travel at higher speeds while keeping engine RPM down.
What is o d on Jeep?
The OD button simply engages/disengages 4th gear which is its Overdrive. Think of having a 4-speed transmission with an overdrive and simply shifting into or out of 4th gear from 3rd. No harm will be caused by doing this, I turn my Overdrive off all the time, especially when towing my trailer.
Does Jeep have overdrive?
There is no overdrive in a 3-speed auto. However all modern Jeep automatics utilize a locking torque converter. When it locks it will indeed drop a few engine RPMs – the same amount as the converter slippage at that speed.
How to reset Jeep Grand Cherokee Laredo security system?
Notes: If you see an intermittent problem like this, consider getting OEM (original equip. mfg., i.s, jeep) key. You can give your VIN number to the dealer to have one made. Insert your key and turn the drivers side door lock to the right , then left and then right again …this will reset the security system.
Are there any problems with the Jeep Grand Cherokee?
Check out our Jeep Grand Cherokee overview to see the most problematic years, worst problems and most recently reported complaints with the Grand Cherokee.
Why did my Jeep Grand Cherokee Laredo have a recall?
The WCM (a small electronic device connected to your ignition switch, that has a loop that goes around the cylinder and “reads” the key) has failed, which is actually a common thing with a few models of jeeps and certain models actually had a recall a few years ago because it was so widespread.
What kind of key do I need for my Jeep Laredo?
Use only a Jeep key made by Jeep. It appears the official jeep key enables the security system when you insert it into the ‘key hole’. Notes: If you see an intermittent problem like this, consider getting OEM (original equip. mfg., i.s, jeep) key. You can give your VIN number to the dealer to have one made.
What happens when the Jeep Grand Cherokee is in overdrive?
If the transmission fluid temperature sensor reports an overheating condition (over 260 degrees F) and the transmission is currently in overdrive, the TCM will downshift to third gear. The TCM will also light the LED in the dash-mounted OD off switch until the temperature drops below 230 degrees F.
Is there a problem with my Jeep Grand Cherokee?
Very often, this will solve the problem. But Jeep Grand Cherokees seem especially prone to more serious transmission problems, and some owners are quite vexed at their inability to determine the causes.
What is the OD on a Jeep Grand Cherokee?
The OD inputs are overdrive off switch, TPS, VSS, transmission temp sensor, output speed sensor and engine rpm. The torque converter clutch (TCC) solenoid will normally operate in overdrive, but the TCM can operate the TCC in third gear if the overdrive off switch is selected.
How can I tell if my Jeep Grand Cherokee is shifting?
Turn ignition key ON and OFF three times, finally leaving the key in the ON position. Leave the Overdrive Off Switch in the normal overdrive (ON) position. Immediately begin counting the number of flashes displayed by the Overdrive Off Switch indicator lamp. There will be two sets of flashes, separated by a pause.