This is on a 5.7 hemi.
Previous Jeeps I've had, were manual transmissions with the tach. This is the first automatic transmission with a tach I've ever driven.
No problem during accelleration. I see the RPMs increase, when I feel the transmission shift, the RPMs go down, and start increasing again. No problem. Normal.
But sometimes, when I'm on fairly flat roads (30 - 40 MPH range), the RPMs will suddenly decrease from 1,500 to 2,000 range, down to 1,000 and sometimes to 500 RPMs. To catch the engine RPMs suddenly decreasing, without any apparent reason (like shifting up) or speed decrease, causes me some concern.
Is this normal? Is this something like the transmission disengaging?
If after I get up to speed, and I let my foot off the gas, the RPMs seem to stay constent. It seems that it only happens when I still have my foot on the gas, but in the way you would do to keep a consent speed. Then the RPMs falls.
When this happens and I do give it some more gas, there is a lag time before I notice the RPMs increasing and then the increase in speed.
This is not on cruise control.
Is this "one of those" problems that will hit me later or perhaps, a gas saving feature?
After having the engine braking of my old Jeeps, it seems that when I come to a red light, my Jeep speeds up. I know it doesn't, it is just I expect engine braking at that point.
Anyway, I bought it in January and have 1,200 miles on it.
Thanks
Tom
Previous Jeeps I've had, were manual transmissions with the tach. This is the first automatic transmission with a tach I've ever driven.
No problem during accelleration. I see the RPMs increase, when I feel the transmission shift, the RPMs go down, and start increasing again. No problem. Normal.
But sometimes, when I'm on fairly flat roads (30 - 40 MPH range), the RPMs will suddenly decrease from 1,500 to 2,000 range, down to 1,000 and sometimes to 500 RPMs. To catch the engine RPMs suddenly decreasing, without any apparent reason (like shifting up) or speed decrease, causes me some concern.
Is this normal? Is this something like the transmission disengaging?
If after I get up to speed, and I let my foot off the gas, the RPMs seem to stay constent. It seems that it only happens when I still have my foot on the gas, but in the way you would do to keep a consent speed. Then the RPMs falls.
When this happens and I do give it some more gas, there is a lag time before I notice the RPMs increasing and then the increase in speed.
This is not on cruise control.
Is this "one of those" problems that will hit me later or perhaps, a gas saving feature?
After having the engine braking of my old Jeeps, it seems that when I come to a red light, my Jeep speeds up. I know it doesn't, it is just I expect engine braking at that point.
Anyway, I bought it in January and have 1,200 miles on it.
Thanks
Tom
