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Hey guys, we have a 2016 Wrangler unlimited with an auto trans. Every once in a while the 2nd to 3rd shift will not happen until 3k rpm or just over 3k.. anyone ever experience this? Only has 8k miles on it. Does have a 3.5" lift and 35s.. I'd take it in but don't have a lot of faith in our local dealers service department. Will probsbly head to the dealer at the end of the week though, figured I'd ask here first
 

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Same here on a '17 JKU Sahara. On hills mine wont shift til after 4k, so I usually have to let off the gas so it shifts. I took it in but the dealer couldnt "recreate" it. It happens 100% of the time on hills and they couldnt "recreate" it. Needless to say, I took it back. Im done with dealers, Ill only take it in if I have no other choice.

Is yours geared at 3.21? Mine is and Im hoping thats the reason and the jeep was designed that way to get it to go where it needs to. Im hoping once I regear, it will change.

Oh, it happened when I was stock and happens now with 35s.
 

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Hey guys, we have a 2016 Wrangler unlimited with an auto trans. Every once in a while the 2nd to 3rd shift will not happen until 3k rpm or just over 3k.. anyone ever experience this? Only has 8k miles on it. Does have a 3.5" lift and 35s.. I'd take it in but don't have a lot of faith in our local dealers service department. Will probsbly head to the dealer at the end of the week though, figured I'd ask here first
Hi NovaKid69,

If you decide to visit your local dealership I'd be happy to offer assistance if needed, just send us a PM with your VIN and let me know!

Andrea
Jeep Social Care Specialist
 

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Hey guys, we have a 2016 Wrangler unlimited with an auto trans. Every once in a while the 2nd to 3rd shift will not happen until 3k rpm or just over 3k.. anyone ever experience this? Only has 8k miles on it. Does have a 3.5" lift and 35s.. I'd take it in but don't have a lot of faith in our local dealers service department. Will probsbly head to the dealer at the end of the week though, figured I'd ask here first
Did you calibrate for the tire size? If so, did you enter 35" or the actual tire height?
 

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Also noticed every once in a while when you first start it rpms will go to 1600 for a while, then slowly come down
 

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Also noticed every once in a while when you first start it rpms will go to 1600 for a while, then slowly come down
That is pretty normal. Has to do with a variety of the temp sensors (coolant, air temp, intake temp).

You definitely need to calibrate for tire size (AEV Procal or the Superchips Flashcal).

None of what you have stated seems particularly abnormal to me...
 

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That is pretty normal. Has to do with a variety of the temp sensors (coolant, air temp, intake temp).

You definitely need to calibrate for tire size (AEV Procal or the Superchips Flashcal).

None of what you have stated seems particularly abnormal to me...
I appreciate the information guys. I'll report back after we flash for tire size
 

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Why do you guys think this is a problem? The 3.6 Pentastar is built to be higher revving. Peak torque is at 4800 RPM. There is a plethora of electronics and software built in to keep from damaging anything. You also have to remember the NAG1 is an adaptive transmission. It will build a profile off of your last 40 shifts. The transmission will also have a different profile until it warms up. I think the magic temp is around 167F but don't hold me to that....
 

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Why do you guys think this is a problem? The 3.6 Pentastar is built to be higher revving. Peak torque is at 4800 RPM. There is a plethora of electronics and software built in to keep from damaging anything. You also have to remember the NAG1 is an adaptive transmission. It will build a profile off of your last 40 shifts. The transmission will also have a different profile until it warms up. I think the magic temp is around 167F but don't hold me to that....
x10.

This is my findings as well. also running 35's without using a procal or similar device is going to cause issues.

I pulled a trailer for 2500 miles thru Montana, Idaho, Utah and Colorado so up and down steep hills. I drove the speed limit which in some of those places is 80mph. When I got home my tranny shifted differently ie more aggressively which I liked. Unfortunately with the adaptive memory it will soon go back to normal.
 

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I appreciate the information guys. I'll report back after we flash for tire size
Im late to the party, but I ran a week with 35s on 3.73s and the tranny was hunting/lagging all over the rolling hills here. When I flashed the PCM, all is happy.

Some things to remember, use real tire height for starters. If you keep your tires at a lower pressure, measuring the tire height will get you close. But a lower pressured tire is not round. From the center of the hub to ground will be off abit from the hub center to top of tire. When I flashed mine, I used the level & tape measure to start. I was 3/4 mph off of 2 GPS. I took it to the next measurement (smaller IIRC) and it took the different to 1/2 mph difference.
 
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