devauxr
New Member
I'm having an issue and I've been searching around quite a bit to try and find an answer but with no luck. I'm running into an issue where my transmission immediately goes into limp mode after replacing the input and output speed sensors.
Vehicle Info:
2003 Jeep Liberty
3.7
45RFE
180,000 Miles
3" lift kit w/ 31" tires (not sure if relevant to the transmission)
Original Issue (reason for replacing the sensors):
If I drove over an hour my jeep would go into limp mode, sometimes it would throw a code, sometimes it wouldn't. I could turn the vehicle off and then back on and everything would be fine although it would go into limp mode after a few miles. Things seemed to reset once the vehicle was sitting. I originally thought it was something to do with the temperature of the transmission and I cleaned the radiator, but the transmission never threw an overheat light on.
The fix:
After some research it looked like the transmission speed sensors were not uncommon to fail in these vehicles and would show similar symptoms. Because the sensors were cheap I figured, let's just change them and see what happens.
The new problem:
The liberty now immediately goes into limp mode and will throw a code after about a mile. The codes are P1776, and P0731 which would indicate a stuck solenoid, but that's a hell of a coincidence that it occurs immediately after changing the 2 speed sensors.
I checked the 2 speed sensors by swapping them, no issues with the speedometer, I tried swapping the old ones back in, same issue.
I was wondering if anyone out there with a little more knowledge as to how all these components worked together might have some ideas, as in, maybe there's a short somewhere, issues with the TCM or TCM Harness, perhaps a fuse.
for the record I have no issue replacing the solenoid pack, and if this didn't happen immediately (next turn of the key) after replacing those speed sensors than I would have already ordered it. This is a second vehicle that I use for work, fishing, and driving to my cabin so the wife isn't too keen on me replacing tons of parts in a diagnositc hunt if I can avoid it.
One note, I bought this thing like 5 months ago, and while I was changing the sensors I did notice newer gasket material on the pan which makes me suspect the PO had been poking around there in the not too too distant past.
Thanks to anyone who has any ideas or directions I could check out.
Vehicle Info:
2003 Jeep Liberty
3.7
45RFE
180,000 Miles
3" lift kit w/ 31" tires (not sure if relevant to the transmission)
Original Issue (reason for replacing the sensors):
If I drove over an hour my jeep would go into limp mode, sometimes it would throw a code, sometimes it wouldn't. I could turn the vehicle off and then back on and everything would be fine although it would go into limp mode after a few miles. Things seemed to reset once the vehicle was sitting. I originally thought it was something to do with the temperature of the transmission and I cleaned the radiator, but the transmission never threw an overheat light on.
The fix:
After some research it looked like the transmission speed sensors were not uncommon to fail in these vehicles and would show similar symptoms. Because the sensors were cheap I figured, let's just change them and see what happens.
The new problem:
The liberty now immediately goes into limp mode and will throw a code after about a mile. The codes are P1776, and P0731 which would indicate a stuck solenoid, but that's a hell of a coincidence that it occurs immediately after changing the 2 speed sensors.
I checked the 2 speed sensors by swapping them, no issues with the speedometer, I tried swapping the old ones back in, same issue.
I was wondering if anyone out there with a little more knowledge as to how all these components worked together might have some ideas, as in, maybe there's a short somewhere, issues with the TCM or TCM Harness, perhaps a fuse.
for the record I have no issue replacing the solenoid pack, and if this didn't happen immediately (next turn of the key) after replacing those speed sensors than I would have already ordered it. This is a second vehicle that I use for work, fishing, and driving to my cabin so the wife isn't too keen on me replacing tons of parts in a diagnositc hunt if I can avoid it.
One note, I bought this thing like 5 months ago, and while I was changing the sensors I did notice newer gasket material on the pan which makes me suspect the PO had been poking around there in the not too too distant past.
Thanks to anyone who has any ideas or directions I could check out.