High RPM's During Normal Shifting when Engine Cold - 2014+ Jeep Cherokee Forums
User Tag List

 1Likes
  • 1 Post By Mark_
 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 01-13-2017, 07:51 AM Thread Starter
Member
 
C3PO's Avatar
 
Join Date: Nov 2016
Location: Great White North
Posts: 56
Garage
High RPM's During Normal Shifting when Engine Cold

Usually early in the morning on the first start of the day, or sometimes in the afternoon but usually on colder days, when I pull the jeep off the driveway it waits to shift into 2nd gear after about 3K-4K RPMs and I always prepare for the hard engagement because its spinning way to fast for the next gear. This happens in 1st, 2nd and 3rd. This usually goes away shortly but on my short 5 min. drive to work is killing me.

My foot is also *barely* on the accelerator. In other words, there is nothing I can do to cause it to shift sooner. I've also tried shifting manually but obviously that was to no avail as that's only useful for shifting at higher RPM's anyways.

This is a brand new 2017 cherokee trailhawk, and I have been treating it with kid gloves- especially now- so as to not make anything worse. Anyone know what it could be? Something wrong with the sensor that tells the KL when to shift? I want to avoid the dealership as much as possible and use warrantee only for emergencies.

2017 Cherokee Trailhawk V6 All Black

-Comfort & Convenience
-Cold Weather
-SafetyTec Package
-Command View Panorama Sunroof
-9 Speaker Sound System
-Tow Package
-8.4in Nav System

Last edited by C3PO; 01-13-2017 at 07:54 AM.
C3PO is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 01-13-2017, 09:44 AM
Hardcore Member
 
dhh3's Avatar
 
Join Date: Aug 2016
Location: Fort Wayne, Indiana
Posts: 1,424
Garage
Mine does the same thing, but the revs do not go as high as yours. I think that they must be programmed to do this in cold weather, to be able to get cabin heat sooner. Once mine is warmed up, it stops doing this. My MPGs when cold outside drop to 13.5 to 14.5, from my normal 18.5 to 19.5, mostly city driving.

2016 Cherokee Trailhawk: Mango Tango Pearl Coat over Black.
OPTIONS: Every Available Factory Option/Package Except Remote CD Player.
MODS: Whispbars; Mopar Cargo Cover; Mopar Cargo Mat; Mopar/KICKER 9 Speaker Upgrade; KICKER Sub and Amp; Ziebart Undercoating; aFe CAI; Red Interior Trim Pieces.
FUTURE MODS: Remote CD Player; Mopar Rock Rails; Rear Fog Lights.
dhh3 is online now  
post #3 of 4 (permalink) Old 01-13-2017, 11:03 AM Thread Starter
Member
 
C3PO's Avatar
 
Join Date: Nov 2016
Location: Great White North
Posts: 56
Garage
Quote:
Originally Posted by dhh3 View Post
Mine does the same thing, but the revs do not go as high as yours. I think that they must be programmed to do this in cold weather, to be able to get cabin heat sooner. Once mine is warmed up, it stops doing this. My MPGs when cold outside drop to 13.5 to 14.5, from my normal 18.5 to 19.5, mostly city driving.
Not a chance. We are talking about different things.

My jeep will literally wobble during the shifts that's how hard the engagements are, and like i said, it doesn't matter how soft my foot is, if i want to drive more than 20 kph at a decent rpm i have to push out of that 1st gear by revving it up so high -probably causing damage every time i do so. This repeats for 2nd and 3rd gear as well. By the time i get to 4th its not so bad, but repeat that for every stop sign/light.

This is 100% unnatural, I just want to know if anybody knows what could cause this? Trans fluid? Sensors? Software issue?

Also any other 2017 owners experienced this, and if so do you think its related to cold weather?

2017 Cherokee Trailhawk V6 All Black

-Comfort & Convenience
-Cold Weather
-SafetyTec Package
-Command View Panorama Sunroof
-9 Speaker Sound System
-Tow Package
-8.4in Nav System
C3PO is offline  
 
post #4 of 4 (permalink) Old 01-13-2017, 11:16 AM
Forum Elder
 
Mark_'s Avatar
 
Join Date: Jun 2015
Location: Québec, Canada
Posts: 4,142
Quote:
Originally Posted by C3PO View Post
Not a chance. We are talking about different things.

My jeep will literally wobble during the shifts that's how hard the engagements are, and like i said, it doesn't matter how soft my foot is, if i want to drive more than 20 kph at a decent rpm i have to push out of that 1st gear by revving it up so high -probably causing damage every time i do so. This repeats for 2nd and 3rd gear as well. By the time i get to 4th its not so bad, but repeat that for every stop sign/light.

This is 100% unnatural, I just want to know if anybody knows what could cause this? Trans fluid? Sensors? Software issue?

Also any other 2017 owners experienced this, and if so do you think its related to cold weather?
Sorry I have a 2015. But what you describe there sounds very alarming. You will have to visit the dealership. My advice : tell them to let the Jeep sit outside overnight and let the tech start it up in the morning and take a test drive. Tell them how long you let it warm up before you leave in the morning, so they can compare with your situation.

Mine *bangs* into 2nd when it's cold. By cold I mean whenever the outside temp is below 10C (or 50F) in the morning, so basically every morning where I live. If I drive away without warming it up for at least 2 minutes, it will bang into 2nd, even I barely accelerate and am only going 10mph. Revs don't go that high, mine will upshift below 2500 RPM when it does this. But yours is totally different...

The only TSB I've found for 2017 shifting issues is for a delayed Reverse to Drive situation. 2016s and below have a bunch of different TSBs for different shifting anomalies, but not 2017s... yet.

Have this investigated asap, to prevent possible permanent damage to your tranny/drivetrain...
fdegree likes this.

My avatar is the Elder Predator (goes well with my forum status and overall temper )
2015 North (Canada) - V6 - AD1
Cold, Tow, 8.4A, 9 speakers with sub
Mark_ is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 2014+ Jeep Cherokee Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



  Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold engine won't start for high temp Wheyman Engine and Technical Discussion 7 10-05-2016 03:14 PM
Unusually high RPM on sport mode (video) Djungo Transmission Discussion 6 02-02-2016 05:54 PM
EXTREME low power / High RPM w/ A/C on ari_nj 2014+ Jeep Cherokee General Discussion 18 07-21-2015 11:31 AM
High RPM's - Is this a problem? tjarget Engine and Technical Discussion 18 10-09-2014 10:08 PM
Normal shifting question? gundad Engine and Technical Discussion 3 07-18-2014 08:54 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On