Is it me, or does the JT really struggle...

[Enis]

Mine has absolutely zero problems. Mine is also a diesel.

Sponsored

 

[Timoleon]

I would rather have this Jeep doing it's thing on hills. I had a 2021 Tacoma TRD Pro and it hunted for the right gear even on minor grades. And, that was with the 6 speed auto.

 

[graham5david]

Mine has absolutely zero problems. Mine is also a diesel.

Same. Sometimes I feel like my diesel has too much power.

 

[PlayfulBird]

try downshifting with the gas peddle

Can you explain to me what that means? As in flooring the pedal or using the shifting function on the automatic? Not sure what you mean.

 

[ShadowsPapa]

Can you explain to me what that means? As in flooring the pedal or using the shifting function on the automatic? Not sure what you mean.

I think there's a bit of sarcasm in his comment, is what I think it means. I think he means "give it some GAS".

And in a way, yeah, what's up with people thinking anything over 3,000 is going to destroy these and parts will fly over the fence into the farmer's hog lot or something?

These need RPM to generate power if talking the gas engine version. Stop babying these engines.
Hell, they don't even go into intake valve high lift mode until 2800 RPM and above! They are in economy mode to that point.

Give it some pedal, run the RPMs up, force a downshift by giving it more gas pedal.
Stop pussyfooting around with the gas pedal. I think that's what he meant.

 

[PlayfulBird]

need RPM

Heard from the mechanic when we bought the JT that accelerating it through every once (drive it like you stole it were his words) in a while will also make sure it will flush and get oil everywhere needed. Even though many argue new engines apparently don't have break in time anymore, the first hundred we kept it under 60km/h, but accelerating nicely through and going through the gears. After that 500km, no cruise control, nice sharp acceleration but no wide open throttle (gotta be careful because that's easy on the Autobahn).
Friend of ours taught his vehicle computers to not shift or accelerate nicely, adapting his slowpoke driving style when he babied the car after purchase. Reset and it came much livelier.

 

[Sandevino]

Gas makes power up high and loves higher RPM’s.

Diesel makes power down low and hates higher RPM’S.

Comparing apples to oranges.

 

[ShadowsPapa]

Heard from the mechanic when we bought the JT that accelerating it through every once (drive it like you stole it were his words) in a while will also make sure it will flush and get oil everywhere needed.

Yes and no. Yes to the wind 'er up once in a while, every few drives. Otherwise, varnish, etc. will form on certain parts - valve stems are one example, then months later when you finally DO wind it up, things get sticky. So it's good, on any engine, to run it through its paces now and then.
But no to the "get oil everywhere needed" because that happens every time it runs. You aren't oiling a sewing machine. Oil must get to everywhere needed when you first start the thing, and then the entire time it's running from there.
It's more like internet lore, old wive's tale, legend, whatever. If it relied on winding it up to get oil where needed, these things would be failing left and right.
Yes, to keep varnish off, keep parts exercised, wiped clean, no to needing to wind it to get oil where needed. Oil pressure does that.

I have info direct from Ford from decades ago about break-in........ Ford says "not needed" back then. However, Perfect Circle/Hastings says to vary the speed. Not slow, not fast, not constant - keep it varied. Don't lug it, don't force constant high RPM. That's not really breaking in, though, that's ensuring a good wear pattern so that later driving modes won't have negative consequences.
Hey, I went through months of engine build training in college, and the experience of working for shop owners who knew their stuff. I ignore most of the crap I see on the internet these days LOL. 50 years in the field have trained me with reality.

Gas makes power up high and loves higher RPM’s.

Diesel makes power down low and hates higher RPM’S.

Comparing apples to oranges.

Yeah, as a person who has a whole lot of hours sitting behind (or even in front of) diesel engines over a few years, they are very different. Diesels also like constant speeds better and low RPM. 1500-2000 is what I seem to remember from one IH I had. Gas - you're killing it at that low RPM.

 

[xcantuaj]

I have a max tow and I swear it struggles to get going....Its like the engine has no torque. I test drove a JL rubi with the 4cly turbo and wow.....it moves effortlessly. I may switch back to the JL for the turbo and the sky top.

 

[Kblanton]

Someone on here on some thread told me to keep the RPMs up on my gas MT Jeep.

I took the advice and now I rev it to keep the power up and I have to say it is much better. Recently bought an old Cherokee and pulled it on a trailer 2 hrs home. Never got above 4th gear and it loved it. Got 20 MPG empty going down and 16.4 MPG coming back loaded.

You have to keep the revs up on the gas motor. As for the oiling thing, change your screen to show oil pressure. It is low until about 3000 rpm then it jumps to like 70 psi. It's amazing to watch.

 

[ZoMojave]

My Pentastar has respectable power when called upon. Of course, a Hemi would be more fun! It would still get about the same mileage!

 

[ShadowsPapa]

I have a max tow and I swear it struggles to get going....Its like the engine has no torque. I test drove a JL rubi with the 4cly turbo and wow.....it moves effortlessly. I may switch back to the JL for the turbo and the sky top.

Seriously comparing a heavier, longer, truck to a smaller shorter lighter JL?
There's hundreds of pounds difference, depending on the options, could be close to 1,000 pounds difference. A light JL could be under 4,000 pounds while a JT can be in the upper 4,000 range.
If we go there, the 4.0 in my car can keep up with my JT - but then my car only weighs 3,300 pounds and my JT is closer to 5,000 pounds.

 

[ShadowsPapa]

As for the oiling thing, change your screen to show oil pressure. It is low until about 3000 rpm then it jumps to like 70 psi. It's amazing to watch.

Real engine people know that oil pressure doesn't need to be high - especially in lower RPMs, and that too much pressure causes the pump to be a parasitic load unnecessarily.
It's a dual-displacement pump. There isn't any such thing as a high pressure pump, it's a higher volume. Pressure is the result of a volume against resistance, and they regulate the pressure pretty closely. Mine runs 29-30 most of the time, 70 when needed. Saves fuel and saves wear and tear on the pump.
I've seen the old school guys build engines and believing they need 70-80 psi of pressure to make the engine last - they come back later whining about the pump drive gears being trashed...... DUH.

 

[PlayfulBird]

You have to keep the revs up on the gas motor. As for the oiling thing, change your screen to show oil pressure. It is low until about 3000 rpm then it jumps to like 70 psi. It's amazing to watch.

I will have a look at that, I like to have the offroad pages on and look at the temps and pressure and have not really noticed such a big jump

@ShadowsPapa thats were mine sits most of the time 30ish, even when i punsh it on the Autobahn. Will see what happens offroad and with a trailer though.

Recently a fellow JT owner was tearing down the Autobahn, 150/160 km/h around 93/99mph folr about 3 hours, parked it, got a coffee got back in and when joining onto the Autobahn the check engine light. Needs a new engine

 

[DailyMoparGuy]

I have a max tow and I swear it struggles to get going....Its like the engine has no torque. I test drove a JL rubi with the 4cly turbo and wow.....it moves effortlessly. I may switch back to the JL for the turbo and the sky top.

That’s so odd because I feel the opposite and mine is on 35s. I feel like I’m going way faster than I really am when I smash the pedal haha.

I will say this and I have no real evidence of it but I swear the 8 speed has a mind of its own in some vehicles. In my old Ram, the 8 speed was VERY inconsistent. I actually thought it was a bad transmission but everything I read said otherwise. Sometimes flooring it would throw me to the back of my seat. Other times it would drag along with little action.

I got a Charger RT after that and the 8speed was AMAZING. Same goes for my JT 8speed. Again, very anecdotal but my 2018 Ram definitely had some weird transmission gremlins that I never got sorted out.

Sponsored