Strange shifting

[EchoMatt]

Yeah, this sounds like the exact same thing to what I am experiencing. I'm holding off on taking to the dealer right now given low mileage in the hope that it resolves after a few more miles and/or an update comes out soon that can be applied. Your description makes perfect sense to me though.

I think I figured out how to reproduce this in a more exaggerated way today that should make it easy to show the dealer. My wife was driving while I was the passenger today and at one point we were about at 20mph and she went to accelerate the RPMS went to 5-6k and the Jeep felt like it was in neutral and then once it kicked back in kind of shuddered similar to what others have described. I took it out to see if I could reproduce it and found that if "flick" the gas pedal pressing it quick and instantly releasing maybe just a quarter to half way down the RPM will spike up to about 5k and then slowly decline before the down shift occurs. Just like an engine brake with a manual trans. I wasn't able to reproduce the shudder though.

• I am going to test a bit more, but I was able to reproduce this like 5 times in about 2 miles and think I will make an appointment to have this looked at.
• My stop/start doesn't work and need to have that checked too.
• Also the lid that closed to hide the USB ports does close straight so I have to have that fixed.

Guess I have been lucky, but I have never bought a new car and had issues so this is pretty disappointing. My wife told me she doesn't trust this Jeep and asked if we made a mistake and should have bought honda/toyota like we originally had planned.

 

[kverk88]

I think I figured out how to reproduce this in a more exaggerated way today that should make it easy to show the dealer. My wife was driving while I was the passenger today and at one point we were about at 20mph and she went to accelerate the RPMS went to 5-6k and the Jeep felt like it was in neutral and then once it kicked back in kind of shuddered similar to what others have described. I took it out to see if I could reproduce it and found that if "flick" the gas pedal pressing it quick and instantly releasing maybe just a quarter to half way down the RPM will spike up to about 5k and then slowly decline before the down shift occurs. Just like an engine brake with a manual trans. I wasn't able to reproduce the shudder though.

• I am going to test a bit more, but I was able to reproduce this like 5 times in about 2 miles and think I will make an appointment to have this looked at.
• My stop/start doesn't work and need to have that checked too.
• Also the lid that closed to hide the USB ports does close straight so I have to have that fixed.

Guess I have been lucky, but I have never bought a new car and had issues so this is pretty disappointing. My wife told me she doesn't trust this Jeep and asked if we made a mistake and should have bought honda/toyota like we originally had planned.

Thanks for the details. Let us know what dealer says if you do take it in.

 

[Voss33]

I’m afraid I’m having similar issues. The rpm’s jump around sporadically especially between 1.5-3 and 10-30 mph. It’s hard to know what’s normal but I can’t imagine feeling a rougher/jerkier acceleration than I did with my 2010 patriot being normal. Need to schedule a time to take it it but worried they’ll tell me I’m being dramatic.

 

[Frankszj]

My 2021 WL limited, at 3000 miles currently I’m also getting an intermittent transmission “Stumble”. Generally it occurs as I give it gas from a stop. It has happen since new. I have an appointment on 12/7.

I’ll like to see if they have a fix for it.

Thanks
Frank G

 

[Sbradle4]

My 2021 WL limited, at 3000 miles currently I’m also getting an intermittent transmission “Stumble”. Generally it occurs as I give it gas from a stop. It has happen since new. I have an appointment on 12/7.

I’ll like to see if they have a fix for it.

Thanks
Frank G

Good luck. I’ve been told twice this is “normal”

 

[dsgcobra]

I having the same Issue, with medium acceleration shift between 1st and 2nd there is a shutter or slipping feel. My Jeep has been in twice for this. I once in September with 1259 miles, software update was done and a second time on November 3rd. Just got the Jeep back last night and was told the tech could not reproduce this issue. Unfortunately I had the dealer drop the Jeep off at my house and pick up the loaner so when I took it for a drive and discovered it was still doing it I had no choice but to reach out to the Service Manager last night but she had already left. I will follow up with her this morning and keep everyone here posted on what is done on resolving the issue. I also reached out to JeepCares in a PM.

 

[kverk88]

I having the same Issue, with medium acceleration shift between 1st and 2nd there is a shutter or slipping feel. My Jeep has been in twice for this. I once in September with 1259 miles, software update was done and a second time on November 3rd. Just got the Jeep back last night and was told the tech could not reproduce this issue. Unfortunately I had the dealer drop the Jeep off at my house and pick up the loaner so when I took it for a drive and discovered it was still doing it I had no choice but to reach out to the Service Manager last night but she had already left. I will follow up with her this morning and keep everyone here posted on what is done on resolving the issue. I also reached out to JeepCares in a PM.

I believe @joer561 was having similar (shudder upshifting) issues and ended up going the valve body replacement route. Unsure if that resolved the issue or not.

 

[dsgcobra]

I believe @joer561 was having similar (shudder upshifting) issues and ended up going the valve body replacement route. Unsure if that resolved the issue or not.

Thanks brought this up to the tech and he that would be the first thing he would replace if he had to replace something. He is opening a star case with Jeep. He did mention like others that there is a sync they can do and also that the tranny does go through a learning process that could take up to 5K miles.

 

[Moj]

I have a GCL Limited with about 900 miles and I think I have pretty much the same thing going on. As you mention it is hard to describe. The acceleration seems ok, but it does feel like a manual downshift when I am at lower speeds. I have been thinking when the downshift happens it enters the lower number gear at two high an RPM. I have been debating on taking it to the dealer, but have been monitoring it trying to figure out how to be describe it to them.

There’s already a service bulletin issued for the downshift issue. Just call your dealership and have them look it up for you and have them apply it. It’s a software update

 

[EchoMatt]

There’s already a service bulletin issued for the downshift issue. Just call your dealership and have them look it up for you and have them apply it. It’s a software update

If there is a software fix for this that would be awesome. Do you know if there id number or something to identify the related service bulletin?
I really appreciate you mentioning this.

Appointment is scheduled on December 7th. 🤞

 

[dsgcobra]

I believe @joer561 was having similar (shudder upshifting) issues and ended up going the valve body replacement route. Unsure if that resolved the issue or not.

Thanks, I mention it to the tech that was able to reproduce the issue. Hoping to hear from them today on the course of action they are taking with it.

 

[Moj]

If there is a software fix for this that would be awesome. Do you know if there id number or something to identify the related service bulletin?
I really appreciate you mentioning this.

Appointment is scheduled on December 7th. 🤞

TSB 21-027-21
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set:
• P032F Combustion
Engine Producing Insufficient Torque.
Customers may also experience a shift quality issue during a 54
downshift.

I think there was one more because I had a couple TSB/RRT applied for downshift issue. The dealership should be able to look it up if you ask them

 

[Moj]

Got my car back from the dealership and the shuddering issue upshifting (d1 to d2 when transmission temp is +165F) is now resolved!

Transmission valve body was replaced, just like for the couple of other users on this issue thread.

Here’s the summary of dealership notes
- verified with guest on a test drive and experienced concern, shudder during 1-2 upshift intermittently with trans temp above 170F
- tech verified fluid level and condition, performed quicklearn, no effect/change
- dealership contacted Star (Jeep), and then removed pan and inspected debris in pan to observe normal amount of debris in pan from transmission breaking in. Fluid not discolored and nothing abnormal in pan
- Star advised valve body replacement.
- dealership replaced transmission valve body, filled with correct amount of liquid, programmed and configured to vehicle. Performed quicklearn, transmission now shifting normally with temp over 170F

There you have it! I’m just glad it got resolved and I can get back to enjoying my new Jeep cuz I really love driving it so far.

So I guess for some the shuddering/strange shifting may get resolved with transmission breaking in or quicklearn, but in my case it didn’t, and the transmission valve body needed to be replaced. My GCL has about 3K miles

Thanks @JeepCares helping me and coordinating with dealership

 

[dsgcobra]

Got my car back from the dealership and the shuddering issue upshifting (d1 to d2 when transmission temp is +165F) is now resolved!

Transmission valve body was replaced, just like for the couple of other users on this issue thread.

Here’s the summary of dealership notes
- verified with guest on a test drive and experienced concern, shudder during 1-2 upshift intermittently with trans temp above 170F
- tech verified fluid level and condition, performed quicklearn, no effect/change
- dealership contacted Star (Jeep), and then removed pan and inspected debris in pan to observe normal amount of debris in pan from transmission breaking in. Fluid not discolored and nothing abnormal in pan
- Star advised valve body replacement.
- dealership replaced transmission valve body, filled with correct amount of liquid, programmed and configured to vehicle. Performed quicklearn, transmission now shifting normally with temp over 170F

There you have it! I’m just glad it got resolved and I can get back to enjoying my new Jeep cuz I really love driving it so far.

So I guess for some the shuddering/strange shifting may get resolved with transmission breaking in or quicklearn, but in my case it didn’t, and the transmission valve body needed to be replaced. My GCL has about 3K miles

Thanks @JeepCares helping me and coordinating with dealership

Glad to hear yours issues got resolved!!

 

[dsgcobra]

Just heard back from my dealer after opening the star case, they will be changing out the valve body also. Now it's just a waiting game as the part is on back order

 

[nealtrombley]

V6 or v8 powerplants?

 

[dsgcobra]

V6 or v8 powerplants?

V6

 

[Moj]

wondering if this transmission valve body replacement issue will ever become a recall.

 

[Sbradle4]

wondering if this transmission valve body replacement issue will ever become a recall.

You’d have to think that if the Uconnect system had a recall, the transmission valve body will as well. My servicing dealership is still in denial that the shifting issues aren’t “normal”

 

[AZJeeper21]

My Grand Cherokee L has 2900 miles and it shifts very weird around 10 to 20 mph. It’s almost as if the transmission was slipping. I will be taking into dealership tomorrow. Hopefully it’s just low on transmission fluid or a software update, but I don’t know. It’s frustrating. If i accelerate fast you can’t really tell, but from a dead stop and accelerating slowly once it hits 10 to 20mph it shakes almost as if it was going to stall. After that speed it drives fine. Has anyone experienced this with any other Jeeps? I traded in my Jeep Cherokee and never had any problems with that one.

I have a similar issue. My GGL feels like it’s stuttering as it shifts between 1st and 2nd gears. Does it in downshift also. All other gears are great.