hastur
New Member
- Joined
- June 30, 2011
- Messages
- 7
- Reaction score
- 0
- City, State
- N. IN
- Year, Model & Trim Level
- '99 XLT 4.0 SOHC
First the vehicle details:
1999 Explorer 4 dr. XLT 4WD, 4.0 SOHC, 5 speed OD auto (code D?), 158k, no engine or transmission codes, O/D button works.
The problem: At highway speeds (60-65 mph), on cruise or not, the transmission seems to randomly downshift from 5th to 4th, then back up again. There is no connection between load and the downshift. Sometimes downhill, sometimes flat road, sometimes uphill. Sometimes it won't happen on my commute (23 miles with 2 traffic lights), some days it spends as much time in 4th as 5th. The only thing that seems to correlate, is that when I hit a bump in the road it will sometimes downshift. It seems like it wants to be in 5th, but is told to downshift, then times out after 2-10 sec. and goes back to 4th. The O/D off light doesn't come on during these downshifts.
I had it checked out by a local tranny shop who couldn't get the problem to repeat, so they said it was probably a drivability? issue.
My guess is that I have a connector or electrical component going bad, but I don't know where to start looking.
Any thoughts?
Thanks,
Rob
1999 Explorer 4 dr. XLT 4WD, 4.0 SOHC, 5 speed OD auto (code D?), 158k, no engine or transmission codes, O/D button works.
The problem: At highway speeds (60-65 mph), on cruise or not, the transmission seems to randomly downshift from 5th to 4th, then back up again. There is no connection between load and the downshift. Sometimes downhill, sometimes flat road, sometimes uphill. Sometimes it won't happen on my commute (23 miles with 2 traffic lights), some days it spends as much time in 4th as 5th. The only thing that seems to correlate, is that when I hit a bump in the road it will sometimes downshift. It seems like it wants to be in 5th, but is told to downshift, then times out after 2-10 sec. and goes back to 4th. The O/D off light doesn't come on during these downshifts.
I had it checked out by a local tranny shop who couldn't get the problem to repeat, so they said it was probably a drivability? issue.
My guess is that I have a connector or electrical component going bad, but I don't know where to start looking.
Any thoughts?
Thanks,
Rob