2025 Jeep Gladiator and shifting issues

[blownbayou]

Bought the truck in April 2025 and I always ran 93 octane in my vehicles.... This truck ran like garbage since day one!!!! Shifting is jerky from 6-7-8 and it feels like the converter locks up HARD. Rode like this for about 4k miles and decided to put 100% 87 octane in it.... Totally different truck!!! Smooth shifts and no hard lock ups. Dumped some ethanol 87 and still rides great, Last Wednesday I decided to try 93 again and the demons returned!!!! Burned through that tank and went back to 87 and clearing back up now!!! I do not get it?? I am in no means a rookie when it comes to mechanics (owned and worked on a good many of muscle cars) so it is not a placebo effect at all..... Anyone else have this issue???

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[93civej1]

my 2025 shifts weird too, but mine is a hard shift or almost hesitant quick shift that you can feel into 3rd when i am very light throttle. its pretty annoying.

 

[blownbayou]

my 2025 shifts weird too, but mine is a hard shift or almost hesitant quick shift that you can feel into 3rd when i am very light throttle. its pretty annoying.

Well at least I am not alone...... I am wondering if the throttle lag is contributing to this as well..... I would hate to spend 300 on a throttle controller just to find out it would not help with this

 

[Artsifrtsi]

My 2020 prefers 89 octane, or it pings.

Wife's last car, 2014 Prius, lost nearly 10 MPG when we tried running premium in it...

 

[blownbayou]

My 2020 prefers 89 octane, or it pings.

Wife's last car, 2014 Prius, lost nearly 10 MPG when we tried running premium in it...

My old 2014 would ping on anything but 93 octane.... Finicky ass 3.6 motors

 

[Gvsukids]

Well at least I am not alone...... I am wondering if the throttle lag is contributing to this as well..... I would hate to spend 300 on a throttle controller just to find out it would not help with this

What could hurt?

 

[Hootbro]

It's rated for 87 octane. Even the owners manual says there is no benefit running "Premium Fuel" in it.

 

[93civej1]

It's rated for 87 octane. Even the owners manual says there is no benefit running "Premium Fuel" in it.

87 is all I run in mine. Its all I ran in my 2020 as well. As for my 3rd gear hard shift, id probably take it to the dealer and it would prob not do it. Its not every time but just sometimes on light throttle from when it goes 2nd to 3rd auto shift. At this point im just dealin with it.

 

[Hootbro]

87 is all I run in mine. Its all I ran in my 2020 as well.

Same here. On my 4th Gladiator with the 3.6L and hundreds of fill ups with 87 octane and never an issue with knock or ping. If I am feeling generous, I may throw in a bottle of injector cleaner once in a blue moon mainly because I buy cheap gas at the local Stop and Rob Quickie Mart store.

 

[Hootbro]

I don’t get it, how can a higher octane fuel cause all these issues when the car is programmed to run on a lower octane?

I suspect it is due to the limits of the Cam Phasers to retard timing enough to account for slower burning fuel that higher octane is composed of.

 

[Verne]

From my rote understanding of Octane, it is the fuel's resistance to burn. Cars that require higher octane have higher performing engines. If your engine is rated to burn fuel at a certain temperature and it cannot reach the appropriate level to efficiently use the 93, it does not ignite. My wife has a Volvo XC90 T6 with a Supercharged engine. That thing needs the 93 or it will not perform. The same should be true on the other end?

 

[iceman47]

I have a 25 Glad Rubi also with no problem at 87, I’ve never put 93 in and based on this never will.

 

[Baxter]

my 2025 shifts weird too, but mine is a hard shift or almost hesitant quick shift that you can feel into 3rd when i am very light throttle. its pretty annoying.

My 24 does this only if light throttle.

 

[93civej1]

My 24 does this only if light throttle.

Is it a certain gear change??

 

[Baxter]

Is it a certain gear change??

when shifting from 2-3

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