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Discussion Starter #1 (Edited)
So I traded in my SXT Plus for a 2015 R/T Scatpack, it has only 4,000 miles. But I have been experiencing very problematic hard shifting at lower gears, most notably on the downshift from 3-2 and 2-1. There is both an audible pop when this happens as well as a physical jolt. Ive done some reading here about a few people experiencing this with the 2015s but wanted to see if anyone has some updated experience and insight into what this might be. PCM flash?? Thanks

It is the 8 speed automatic.
 

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there have been a number of software flashes to address the A8 shift quality / behavior - probably have a dealer check your VIN # to see if there are newer updates that may need to be flashed.

With the low miles on the car, either former owner didn't drive it much, or thought it had "issues" like you're experienced and traded in...not knowing that there may have been a remedy for the symptom.
 

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Previous owner was an elderly gentleman (he put a most unfortunate "No Country For "Old" Men" decal on the rear spoiler that I had to strip off lol) who apparently bought the car using retirement fund money and as the story goes his wife had a meltdown and they had a year long standoff over it with him, demanding he sale it and stop him from driving it. Whether all of that is true I guess we'll never know, but it's my Challenger to take care of now!

Will definitely check up with dealership to check for updates. Wouldn't surpise me if previous owner didnt do any. This would be covered under the powertrain warranty correct?
 

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Previous owner was an elderly gentleman (he put a most unfortunate "No Country For "Old" Men" decal on the rear spoiler that I had to strip off lol) who apparently bought the car using retirement fund money and as the story goes his wife had a meltdown and they had a year long standoff over it with him, demanding he sale it and stop him from driving it. Whether all of that is true I guess we'll never know, but it's my Challenger to take care of now!

Will definitely check up with dealership to check for updates. Wouldn't surpise me if previous owner didnt do any. This would be covered under the powertrain warranty correct?
It would likely be - since you have the symptom and there was a service bulletin about this. Does the vehicle still have remaining time on the 3yr / 36mo warranty?
 

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It would likely be - since you have the symptom and there was a service bulletin about this. Does the vehicle still have remaining time on the 3yr / 36mo warranty?
Thank you for your replies!

It should yes. Only bad part is my local Dodge dealerships have terrible service centers! I wonder if a third party transmission place would be able to do it..
 

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So I traded in my SXT Plus for a 2015 R/T Scatpack, it has only 4,000 miles. But I have been experiencing very problematic hard shifting at lower gears, most notably on the downshift from 3-2 and 2-1. There is both an audible pop when this happens as well as a physical jolt. Ive done some reading here about a few people experiencing this with the 2015s but wanted to see if anyone has some updated experience and insight into what this might be. PCM flash?? Thanks

It is the 8 speed automatic.
Hi EightArc,

Sorry to hear about your concerns with your vehicle. If you decide to visit your local dealership for further diagnosis I'd be happy to offer assistance if needed. Just send us a PM with your VIN and let me know!

Andrea
Dodge Social Care Specialist
 

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Hey everyone. Mine did....does the same thing. They do NOT down shift the was normal cars do. Takes some getting used to. Mine has gotten better. I have 4K on it now. The car is ALWAYS ready to go! It isn't a Buick. My .02
 

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Hey everyone. Mine did....does the same thing. They do NOT down shift the was normal cars do. Takes some getting used to. Mine has gotten better. I have 4K on it now. The car is ALWAYS ready to go! It isn't a Buick. My .02
Yeah I've driven in a few Challengers before but they were nothing like this. Sometimes in lower gears when I'm on the gas it literally does nothing. Definitely not "ready to go". And the pops and jolts coming out of the transmission right now are really quite abrubt and loud. I'm honestly concerned to be driving this thing everyday because I'm afraid the thing is going to tear itself out.
 

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My 16 was one of the first of that year built, and mine had that same alarming downshifting action. 2 trans PCM flashes later, and she shifts like a dream. Occasionally the trans can't decide which gear to be in, there are 8 gears to choose from, but that is a rarity.
One thing not to be concerned about is how it acts AFTER you take your foot off the gas when you were previously punching down: it will stay in whatever gear it was for a bit longer than you may expect. An older 4 or 5 speed auto would shift up to a higher gear right away. These act more like a manual, it stays in that gear. They want it to act more like a manual, that's what my SRT source told me.
 

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Mine is a 2018 and also has the hard pop/jolt... Wonder if Dodge Care would help me out as well.
Hi Skeet Shooter,

While our team members are not mechanically trained, we would still be more than happy to offer our additional layer of assistance if you choose to work with your dealer. Feel free to send us a private message with your VIN and more details on your concerns.

Julie
Dodge Social Care Specialist
 

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Yeah I've driven in a few Challengers before but they were nothing like this. Sometimes in lower gears when I'm on the gas it literally does nothing. Definitely not "ready to go". And the pops and jolts coming out of the transmission right now are really quite abrubt and loud. I'm honestly concerned to be driving this thing everyday because I'm afraid the thing is going to tear itself out.
Take it in.
 

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Ok, update! I took the Scatpack into Dodge today and had their on hand transmission expert go on a test drive with me. He confirmed that transmission was shifting harder and more unusual than normal, particularly while decelerating to a stop. After a few hours the service tech came out and gave me this summary: "the 4469 DTC's are specific and reliant on the correct tire size being installed on the vehicle. The ABS sends speed correlation to the transmission based on the rotational speed of the wheel speed sensors. If the rears are turning slower because the tire is larger, this will cause shifting concerns and potentially transmission damage. The HP70 trans does not like wheel speed differences. Please replace tires with correct size and retest to verify."

Previous owner had Eagle F1s 245/45/ZR20 on front and Nitto Extreme Drag 275/40R20 on rear. It's funny because while I was waiting for the tech I had already walked down the street to order a set of 4 Atturo AZ850 275/40/ZR20 tires (based on the reviews of other Challenger owners and Youtubers (thanks Work Play Drive!)) to replace anyways as this is a daily driver and need something that was better in the rain. It's kind of weird though because I've seen other guys running bigger tires on the rear without any issues? But anyway. Tech wanted me to match the Eagle F1s but I said I needed a bigger tire for traction in the back and mentioned the Atturos and tried to get confirmation that as long as all four tires are the same and therefore no wheel spin differential that there won't be any issues.. I kind of got a hesitant "yes?" response from that, but I guess we will see.
 

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Ok, update! I took the Scatpack into Dodge today and had their on hand transmission expert go on a test drive with me. He confirmed that transmission was shifting harder and more unusual than normal, particularly while decelerating to a stop. After a few hours the service tech came out and gave me this summary: "the 4469 DTC's are specific and reliant on the correct tire size being installed on the vehicle. The ABS sends speed correlation to the transmission based on the rotational speed of the wheel speed sensors. If the rears are turning slower because the tire is larger, this will cause shifting concerns and potentially transmission damage. The HP70 trans does not like wheel speed differences. Please replace tires with correct size and retest to verify."

Previous owner had Eagle F1s 245/45/ZR20 on front and Nitto Extreme Drag 275/40R20 on rear. It's funny because while I was waiting for the tech I had already walked down the street to order a set of 4 Atturo AZ850 275/40/ZR20 tires (based on the reviews of other Challenger owners and Youtubers (thanks Work Play Drive!)) to replace anyways as this is a daily driver and need something that was better in the rain. It's kind of weird though because I've seen other guys running bigger tires on the rear without any issues? But anyway. Tech wanted me to match the Eagle F1s but I said I needed a bigger tire for traction in the back and mentioned the Atturos and tried to get confirmation that as long as all four tires are the same and therefore no wheel spin differential that there won't be any issues.. I kind of got a hesitant "yes?" response from that, but I guess we will see.
The 245/45/20 & 275/40/20 are the same diameter tire (28.7") circumference 90.1" / 90.0" and 725 revs/ mi.

In other words negligible...if you had a rear set worn down more than front, that might even be greater difference (8/32" in front vs. 4/32" in rear...).

I would have pointed out that an SRT392 either trans has the same exact ratios as a Scat Pack and it comes with 275/40s ('15+).

The SP come std with 245/45s on a 4 corners, unless you have a the Dynamics Package ('17+).

There's credibility issues with the information the dealer mentions.
 

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Discussion Starter #15
The 245/45/20 & 275/40/20 are the same diameter tire (28.7") circumference 90.1" / 90.0" and 725 revs/ mi.

In other words negligible...if you had a rear set worn down more than front, that might even be greater difference (8/32" in front vs. 4/32" in rear...).

I would have pointed out that an SRT392 either trans has the same exact ratios as a Scat Pack and it comes with 275/40s ('15+).

The SP come std with 245/45s on a 4 corners, unless you have a the Dynamics Package ('17+).

There's credibility issues with the information the dealer mentions.
I was going to say, other than the width, they seem the same diameter to me, but I am not an expert. That will be frustrating if I just ordered the 4 tires instead of the 2 for the rear when it's not going to make any difference and the real problem lies somewhere else...!
 

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I was going to say, other than the width, they seem the same diameter to me, but I am not an expert. That will be frustrating if I just ordered the 4 tires instead of the 2 for the rear when it's not going to make any difference and the real problem lies somewhere else...!
Change your tire order to what you want - and go to a different dealer.

Or drive the #&[email protected] out of it until the trans dies or throws codes - and make the fix thing instead of making up lies they're telling you.
 

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Discussion Starter #17
Change your tire order to what you want - and go to a different dealer.

Or drive the #&[email protected] out of it until the trans dies or throws codes - and make the fix thing instead of making up lies they're telling you.
Yeah, you're right and I should. But as I mentioned earlier in the thread, literally all of the Dodge dealerships within an hours drive have TERRIBLE service ratings. It's gonna be an uphill battle no matter where I go!
 
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