Yeret
The Village Drunk
- Joined
- Oct 2, 2014
- Posts
- 943
- Reaction score
- 178
- Ram Year
- 1999
- Engine
- 5.9 Magnum
Kind of an odd one that started happening a few weeks ago. At first, I thought it was just me, but it's definitely not.
Keeping it simple, when I leave from work and hit the highway, everything's fine, but shortly after the transmission shifts into overdrive, it does what feels like the torque converter unlocking and then relocking. Basically, the RPM's will suddenly jump a few hundred, and then just as quickly settle back down to where they were. A few things I've noted...
1. At the moment, it ONLY does this in one, specific area of highway when I'm leaving work in the morning. I have yet to observe the problem anywhere or anytime else. I can literally more-or-less tell you when it's going to happen.
2. After doing this cycle 1-3 times, the problem doesn't flare up again for the rest of the drive.
3. This section of highway has a few bumps, one of which almost always seems to cause the issue. I had this same, exact problem a few years back, and it turned out to be a faulty TPS (another -1 to O'Reilly's electronics). Back then, I observed a dead spot in the range when I hooked up my scanner, but this time, nothing unusual; the output smoothly increases/decreases with pedal input. Note however that hitting bumps isn't the only thing that triggers the problem, it just seems to happen randomly but so far, only during this short stretch of highway.
4. Transmission fluid is full and clean. I should hope so since I changed it out just last summer, LOL.
From the brief reading I've done, engine misfires seem to be a common cause. I haven't actually observed any, and scanning the computer revealed no codes, pending or otherwise. My plugs ARE a few years old (NGK BKR6E), which contrasts with my old habit of replacing them once a year even after my plenum gasket got fixed. I just got lazy, LOL. Cap and rotor are a about a year older.
Anyone got any suggestions of where to start?
Keeping it simple, when I leave from work and hit the highway, everything's fine, but shortly after the transmission shifts into overdrive, it does what feels like the torque converter unlocking and then relocking. Basically, the RPM's will suddenly jump a few hundred, and then just as quickly settle back down to where they were. A few things I've noted...
1. At the moment, it ONLY does this in one, specific area of highway when I'm leaving work in the morning. I have yet to observe the problem anywhere or anytime else. I can literally more-or-less tell you when it's going to happen.
2. After doing this cycle 1-3 times, the problem doesn't flare up again for the rest of the drive.
3. This section of highway has a few bumps, one of which almost always seems to cause the issue. I had this same, exact problem a few years back, and it turned out to be a faulty TPS (another -1 to O'Reilly's electronics). Back then, I observed a dead spot in the range when I hooked up my scanner, but this time, nothing unusual; the output smoothly increases/decreases with pedal input. Note however that hitting bumps isn't the only thing that triggers the problem, it just seems to happen randomly but so far, only during this short stretch of highway.
4. Transmission fluid is full and clean. I should hope so since I changed it out just last summer, LOL.
From the brief reading I've done, engine misfires seem to be a common cause. I haven't actually observed any, and scanning the computer revealed no codes, pending or otherwise. My plugs ARE a few years old (NGK BKR6E), which contrasts with my old habit of replacing them once a year even after my plenum gasket got fixed. I just got lazy, LOL. Cap and rotor are a about a year older.
Anyone got any suggestions of where to start?
