JT Rubicon V6 performance

  1. Tonopah01

    Tonopah01 Active Member

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    Neil
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    For folks who have their JT Rubicon already, I am wondering about your thoughts as to overall performance of the Pentastar V6 with the 33 inch tires, 4.10 gearing. Merging onto a highway, overtaking other vehicles on the road, and that out of thing. Sure wish it had a 5.7 semi option, but, is the Pentastar quite adequate to live with? Would the addition of a 2 inch lift and 35 inch tires make a noticeable negative difference?
     
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  2. Alaska-HWY JK

    Alaska-HWY JK Well-Known Member

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    Wifey traded her 2017 Rebel with Hemi and 3.92 gears on a Rubicon JT. Had a 2012 GC with Hemi prior to that. It ain’t no Hemi.
    Passes fine without a load I guess. Pulled our little trailer OK (4400 lbs loaded)
    I want to put 35/11.5/17 Trail Grapplers on it but it will definitely affect towing.
     
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  3. tbaker

    tbaker Well-Known Member

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    Thomas
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    I put 35 inch tires on my gladiator rubicon and I think it does fine the only time I notice a difference is it down shifts from 8th gear to 7th gear going up hills I haven’t redone speedometer like some have done but i have the automatic transmission with the manual option and and I use that sometimes to keep it in 7th gear and the gladiator will move down the road the gladiator with a 5.7 hemi engine would cost a lot more than what we are paying now
     
  4. Phljeeper

    Phljeeper Well-Known Member

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    Paul
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    I am running 35s on my Rubicon as well but did adjust the speedo and while I did notice a slight difference from stock it isn’t much. I have towed my 4500 lb travel trailer without issue. My prior tow vehicle was a 5.7L Hemi Grand Cherokee and for sure it did better on hills but the Gladiator does just fine overall. I would absolutely have bought a supercharged 3.6 or Hemi if they offered options.
     
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  5. mikesjt

    mikesjt Well-Known Member

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    Coming from a 2015 Mustang GT to the Gladiator, this V6 is definitely NOT quick. But to me, it's fine for regular driving and for what I bought it for. And I absolutely LOVE my Gladiator!! I didn't buy it to be fast. I haven't towed with mine, but since it's not real peppy without any load, I can't imagine towing 7k lbs with it lol
     
  6. G8R

    G8R Well-Known Member

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    I find the stock rubicon acceleration and passing capabilities to be better than adequate. I have a couple of 1000 mile trips with a few more 300+ mile trips on highway and I have had no issues at all needing more power. Want more but do not need more... My prior vehicle was a Power Wagon with the 5.7 hemi and I feel about equivalent in terms of passing and merging capabilities.
     
  7. Sorbs

    Sorbs Well-Known Member

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    Goes like a scalded cat compared to my 2015 Ecodiesel. It is tuned differently than my 2018 JLR with a 6-spd too. Big thumbs up passing traffic at 7,000 ft elevation. Also getting 20 MPG. No complaints. It will also get noticeably faster and better fuel mileage after 4k miles.
     
  8. Heinoceros

    Heinoceros Active Member

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    overland with 35 inch tires, recalled spedo, i dont even have the 4.11's, and its fine. It doesnt like 8th much, the slightest hill at ~65-70 and it shifts back down into 7th, but i think thats what it is supposed to do.

    i test drove a jk many years ago and found the acceleration to be atrocious. This is no sports car but it really feels a lot more responsive.
     
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  9. WXman

    WXman Well-Known Member

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    In stock configuration it's quick. The JL Wrangler ran like a startled cat because it's lighter, but the JT does just fine.

    Once you throw 35s and heavier aftermarket wheels and lift kits that catch more wind into the equation, performance starts to drop off very quickly.

    I'm actively trying to sell my 35s for that reason. I need performance more than I need 1" of offroad clearance.
     
  10. Adawg1203

    Adawg1203 Well-Known Member

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    This weekend I did a 500 mile round trip excursion. All highway. Have to say I was impressed with the performance. I could merge, pass, and maintain higher speed 77+ very easily.

    This vehicle has no issue cruising and maintaining speeds above posted speed limits. It's very deceptive as it doesn't "feel" like your doing what the speedo reads out. I like that. Also, you aren't mashing the pedal when cruising at 80mph.

    My thought is if you drive "normally-semi aggrssive" you will find the performance pleasing. Conversely, if you want to drive it like a sports car (aggressive) meaning looking for instant response when pushing pedal to floor then, you will be disappointed.

    My jeep is completely stock (JT LE) and I feel the performance is above average for a truck that offers unique capabilities. You wont be threatening any records whether it be 0-60 or top end speeds but day to day driving and using it within its limits should put a smile on the majority of owners faces.

    I should have started with this but my vehicle is 2 months old and now has 1400 miles.
     
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  11. Bobzdar

    Bobzdar Well-Known Member

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    No issues, have towed around 5000lbs through Shenandoah mtns. in VA and Poconos in PA without issue. It loosens up after 4-5k miles and mpg jumps up .5-1mpg.
     
  12. smlobx

    smlobx Well-Known Member

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    Interesting. You’re the second one to say mileage improves after 4-5 K miles. I’m wondering if you had your oil changed before or after you noticed this improvement.
    Thanks.
     
  13. Bobzdar

    Bobzdar Well-Known Member

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    I have my first oil change scheduled for today (7k miles, oil life is still at 20%). So before oil change. I noticed the exact same behavior on my JLUR, so I think it just takes that long for the Pentastar to fully break in.
     
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  14. Phljeeper

    Phljeeper Well-Known Member

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    Paul
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    Nice, lets see some pictures of the rig in tow. I have a slightly smaller travel trailer and towed it in the Shenandoah mountains a couple weeks ago. Here is mine.

    IMG_0802.jpg
     
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  15. Cburgess33

    Cburgess33 Active Member

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    Christopher
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    2020 Jeep gladiator rubicon and 2018 Rubicon JL
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    its an awesome V6 IMHO ... has nice power and is fine on the highway wrt passing etc... (and I have a 2inch lift and running 35s and not much difference noticed from when it was stock) .
     
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