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Discussion Starter #1 (Edited)
Hey Guys -

I had to go on a pretty far drive (100+ miles) for work yesterday. The first 40 or so miles were stop and go traffic. Once it opened up I was driving fairly fast to get to my destination on time. That being said, at some point (about 40-50 miles later) i started hearing a whining / grinding noise. The vehicle info on the dash indicated a transmission temp of 265. About a minute later the trans temp warning light came on the dash - "transmission too hot" and it started shifting hard (or not at all). The trans temp kept climbing to 280+ by the time I managed to find a safe place to pull over in a parking lot a few miles later.

I left the car there to cool down and ubered the rest of the way to my destination to handle business. By the time I came back an hour or so later it had cooled back down to 160.

I was able to drive it home babying it all the way. It shifted fine and the trans temp never went above 210 or so until I was close to home and drove it a few miles on the street. It was 245 by the time i pulled into the dealership.

The dealership can't find a code and cant replicate the problem. Apparently everything is normal and I'm being told I should pick the car up, keep an eye on what its doing, and bring it back if it happens again.

Any thoughts on whats going on? Why no code? A fluke occurrence? I know I was driving the car hard for a long distance, but I've done that drive a million times before and it hasn't been an issue. I was lucky that I was already close to my destination and was able to make it on time bc of uber (would have been bad if I hadn't). Its still under warranty and now theres a record that I took the car in for the issue, but im more concerned it may happen again on one of those long drives and I'll miss an important work meeting or something along those lines.

Deets:
2015 Challenger R/T - Road and Track
5.7, A8
25K miles.
 

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It sounds like yours went into "limp" mode - this is where it will probably have 3rd gear only (where you felt like it wasn't shifting).

There's multiple limp modes that can set if incorrect input/output shaft speeds, over temperature or fluid level being too high / low.

Monitor how its behaving - if the the fluid level goes to high or low (and these also have internal temperature monitors as well) it will trigger limp mode.

It may be that you had the combination of high(er) ATF temps + coolant temp being high from the slow traffic. The high speed after that might not have allowed it to cool down and built up more heat.

I'm aware in the older A5, that if higher temps were taking place, ATF fluid expanded with temperature and the internal float (for fluid level) could trigger a limp home mode as well.
 

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What do "fairly fast" and "driving the car hard" mean? I think the speeds would need to be pretty high or manually keeping the gear selector in lower gears would be needed before you were really pushing the transmission very hard.

The dealerships keep saying no code, no problem, but there was an obvious issue if the car told you so while you were driving. The notification system in these transmissions definitely isn't anywhere as advanced as they want us to believe.
 

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Sorry to hear about that!!! I would get the fluid changed now that it has been overheated. Not that it is at all a cure.
Good luck, let us know.
 

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Any problem with coolant temp? Coolant temp and Trans temp should have some correlation as the cooler is in the radiator I believe (not 100% sure as i have not really researched our vehicles). I may be concerned the electric suction fan on the radiator is not functioning correctly.
 

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Discussion Starter #7
Any problem with coolant temp? Coolant temp and Trans temp should have some correlation as the cooler is in the radiator I believe (not 100% sure as i have not really researched our vehicles). I may be concerned the electric suction fan on the radiator is not functioning correctly.
Take it to a dealer with a better service department.
Coolant temp was fine. Just the tranny.
Picked up the car today. Havent had a chance to drive it much today but it seems to be shifting fine and temp normal.

If the issue does come up again I will take it elsewhere. I like this particular dealership bc its the closest to me, but if they cant figure it out im not taking any chances.
 

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Discussion Starter #8 (Edited)
What do "fairly fast" and "driving the car hard" mean? I think the speeds would need to be pretty high or manually keeping the gear selector in lower gears would be needed before you were really pushing the transmission very hard.

The dealerships keep saying no code, no problem, but there was an obvious issue if the car told you so while you were driving. The notification system in these transmissions definitely isn't anywhere as advanced as they want us to believe.
Not gonna mince facts here - i was doing a steady 75-90 for 50ish miles. And of course, hitting the gas pedal here and there to go around slower cars. Like I said, it was a work thing and I couldn't be late or miss it.

I dont get the notification system either. Ill immediately get a "health report" email from Dodge the minute the air pressure drops in a tire or if im low on wiper fluid, but the tranny nearly fries? Nothing.
 

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Not gonna mince facts here - i was doing a steady 75-90 for 50ish miles. And of course, hitting the gas pedal here and there to go around slower cars. Like I said, it was a work thing and I couldn't be late or miss it.

I dont get the notification system either. Ill immediately get a "health report" email from Dodge the minute the air pressure drops in a tire or if im low on wiper fluid, but the tranny nearly fries? Nothing.
The transmission shouldn't break a sweat with that kind of driving. My doesn't even get very hot while hot lapping at the track.

The fluid in the transmission a very high quality synthetic, so I highly doubt you hurt anything; however I do think they owe you a fluid change.
 

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working it hardly

Not gonna mince facts here - i was doing a steady 75-90 for 50ish miles. And of course, hitting the gas pedal here and there to go around slower cars. Like I said, it was a work thing and I couldn't be late or miss it.
i drove my car for 200 miles this summer all 90+ with 15-20 miles over 125 and it was full of 3 weeks of camping gear and 3 people, not once during that tank did the tranny get hot. (over 180) gas mileage was sucking though.

Ron
 

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Discussion Starter #11
Looks like itll be going back in this week. Drove it to Orange County today (about 50 mile drive from where i live in L.A.). Moderate traffic, mostly open...hit 250 by the time i got to my destination. IIRC the whining noise and warning lights came on at 260ish the other day, so this is definitely not normal.
 

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might be a bad torque converter on clutches slip. Something is making this run hot and getting this twice points to some issue.

On a highway drive, this ought to be able to handle the heat of summer in Texas, Arizona and deserts. They've tested this in extreme climates.
 

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Looks like itll be going back in this week. Drove it to Orange County today (about 50 mile drive from where i live in L.A.). Moderate traffic, mostly open...hit 250 by the time i got to my destination. IIRC the whining noise and warning lights came on at 260ish the other day, so this is definitely not normal.
Hi Ponch,

Sorry to hear about this! Please don't hesitate to send us a PM with any questions or concerns that may arise during your dealership appointment, we're happy to offer assistance if needed.

Andrea
Dodge Social Care Specialist
 

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Discussion Starter #14 (Edited)
might be a bad torque converter on clutches slip. Something is making this run hot and getting this twice points to some issue.

On a highway drive, this ought to be able to handle the heat of summer in Texas, Arizona and deserts. They've tested this in extreme climates.
Can TQ issue exist w out throwing a code?

I really need to explainto / convince the dealer service dept that the only way to "duplicate the problem" is by driving the car for an hour and for 30-50 miles.
 

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Can TQ issue exist w out throwing a code?

I really need to explainto / convince the dealer service dept that the only way to "duplicate the problem" is by driving the car for an hour and for 30-50 miles.
About the only code it might throw is if the Torque Converter Clutch fails.

But if there's excessive slipping that can cause the fluid to heat up. Explain that the symptom occurs on steady state cruise at highway speeds. It will give them more to look for.
 

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Have any of you used a real scanner? If you got a high temp warning, you better believe there is stored data.

The service department you visited is...
1. Completely incompetent
2. Telling you a lie because they don't want to deal with a warranty repair.
 

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Discussion Starter #17 (Edited)
Ok....

So i took it to a different dealership (the one where i bought it from, a little further from me but worth it).

After a day or so with the car, they are telling me that the transmission cooler bypass valve needs to be replaced. Kinda makes sense because the transmission works fine (shifting, etc) when it is at normal temps. I should have the car back by the end of the day tomorrow and hopefully not have any more issues with it.
 

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Ok....

So i took it to a different dealership (the one where i bought it from, a little further from me but worth it).

After a day or so with the car, they are telling me that the transmission cooler bypass valve needs to be replaced. Kinda makes sense because the transmission works fine (shifting, etc) when it is at normal temps. I should have the car back by the end of the day tomorrow and hopefully not have any more issues with it.
YAY!!! I hope that is the extent of it. Sure would explain a lot. If it not right on your way home turn right around, it will still be hot. Get there and put someone right in it. I have had to do that before.
I am still very optimistic this will be the end. Just don't go away now. Let us know, you know how "we" are.
 

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Ok....

So i took it to a different dealership (the one where i bought it from, a little further from me but worth it).

After a day or so with the car, they are telling me that the transmission cooler bypass valve needs to be replaced. Kinda makes sense because the transmission works fine (shifting, etc) when it is at normal temps. I should have the car back by the end of the day tomorrow and hopefully not have any more issues with it.
Glad to hear a solution is in the works. A competent service department makes a huge difference
 

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Discussion Starter #20
So Far So Good

UPDATE:
I finally got the car back yesterday (took the dealership a couple of days longer than planned, but I wasnt in a hurry).

Its first real test involved another long distance (65 miles each way) work related appointment this morning. I drove it gently on the way up out of an abundance of caution and it did fine. After my appointment, I decided to take advantage of wide open desert back roads and freeways to flog the &*%@ out of it to see if it would hold up. Verdict? It did fine. Trans temp never went over 200, and would come back down a few degrees on its own if it got close to it. Hope I'm not dooming myself by proclaiming victory so soon, but I think the boys at Shaver CDJR in Thousand Oaks got it right.:thumbsup:

Thanks for all your responses and suggestions during this awful, awful ordeal. :x
 
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