6MT 3rd Gear Power Interruption

[Sammar]

I haven't noticed this issue BUT I don't shift from 2nd to 3rd at 1,700 rpm either, I twist it up higher. Sooo, I went for a drive and attempted it, short shifting 2nd to 3rd, I got the results you described. Not just a little bit but very noticeable. I have a Sprint Booster (pedal controller type thingy) that is currently removed, I'm thinking about reinstalling it and seeing if it makes a difference. It's below freezing right now but should warm up in a few days. It would be interesting to hear if others experience with the different pedal controllers.

I have a 2021 manual and I too realize that 2000 rpm is a important number. There is no power below 2000 rpm and if I shift below that there will be a noticeable kick as I accelerate past 2000 rpm. That holds true in any gear except 1st.

I have owned a lot of manuals over the years and never have seen such a notable impact of the rpm shift point. I don't think it's a bad thing or a problem, just a noticing

Sponsored

 

[NachoRuby]

I have a 2021 manual and I too realize that 2000 rpm is a important number. There is no power below 2000 rpm and if I shift below that there will be a noticeable kick as I accelerate past 2000 rpm. That holds true in any gear except 1st.

I have owned a lot of manuals over the years and never have seen such a notable impact of the rpm shift point. I don't think it's a bad thing or a problem, just a noticing

Agreed. The 3.6 is like a 90s Honda. Likes to be revved high. Peak Hp @6400, peak torque at 4400.

 

[JTDay]

I have a 2021 manual and I too realize that 2000 rpm is a important number. There is no power below 2000 rpm and if I shift below that there will be a noticeable kick as I accelerate past 2000 rpm. That holds true in any gear except 1st.

I have owned a lot of manuals over the years and never have seen such a notable impact of the rpm shift point. I don't think it's a bad thing or a problem, just a noticing

Yep, with as many responses in this thread in short order affirming the "kick", it seems like it common enough that whatever is happening is a normal occurrence. I'm really not worried about that since the truck doesn't respond well to shifting early power-wise anyways. I shift closer to 3000rpm from 2nd to 3rd and the truck seems to respond well to that.

 

[OHJeeper]

Agreed. The 3.6 is like a 90s Honda. Likes to be revved high. Peak Hp @6400, peak torque at 4400.

Just be careful cruising above 3000 RPM as the 2-stage oil pump kicks into "high gear". I don't know what the long term effects are of running the pump/pressure that high.

 

[OHJeeper]

Yep, with as many responses in this thread in short order affirming the "kick", it seems like it common enough that whatever is happening is a normal occurrence. I'm really not worried about that since the truck doesn't respond well to shifting early power-wise anyways. I shift closer to 3000rpm from 2nd to 3rd and the truck seems to respond well to that.

I experienced the same power interruption you are referring to in my 2018 JL with the 3.6 and 6MT. Still have it in my JT

 

[JTDay]

I experienced the same power interruption you are referring to in my 2018 JL with the 3.6 and 6MT. Still have it in my JT

Before my post, I could only find one other person with a JL or JT mentioning it on another forum. It seems like many on this forum have experienced it given the small sample of responses in this thread. I bet it's not something to worry about it. Well, I'm not going to worry about it at least now that I know I'm not the only one.

 

[NachoRuby]

Just be careful cruising above 3000 RPM as the 2-stage oil pump kicks into "high gear". I don't know what the long term effects are of running the pump/pressure that high.

Just based on the 3.6 Ram Big Horn I had as a loaner while my axle was being fixed, I think it's fine. It was automatic (of course), and it downshifted to hit 4k-5500 rpm every time I went up the slightest hill. It also revved out a lot higher taking off than I normally do when taking off from a stop. It held the low gears pretty long (but I think it normally skipped first). I was surprised how often and deeply it downshifted (8-speed). It made me feel a lot better about driving the JT at higher RPMs.

 

[JTDay]

Just based on the 3.6 Ram Big Horn I had as a loaner while my axle was being fixed, I think it's fine. It was automatic (of course), and it downshifted to hit 4k-5500 rpm every time I went up the slightest hill. It also revved out a lot higher taking off than I normally do when taking off from a stop. It held the low gears pretty long (but I think it normally skipped first). I was surprised how often and deeply it downshifted (8-speed). It made me feel a lot better about driving the JT at higher RPMs.

The axle leak or something else?

 

[OHJeeper]

Just based on the 3.6 Ram Big Horn I had as a loaner while my axle was being fixed, I think it's fine. It was automatic (of course), and it downshifted to hit 4k-5500 rpm every time I went up the slightest hill. It also revved out a lot higher taking off than I normally do when taking off from a stop. It held the low gears pretty long (but I think it normally skipped first). I was surprised how often and deeply it downshifted (8-speed). It made me feel a lot better about driving the JT at higher RPMs.

Agreed!

I meant constant cruising at +3000RPM, like on the highway in 5th gear at 85 (which, admittedly, is rare...). I also used to sit in 3rd gear a lot on "normal" roads at 45-55 in my JL because it was fun... then realized the pump was running hard all that time.

I don't think anyone has reported any specific issues, but I can't imagine it was meant to run at that high of psi for extended periods.

 

[NachoRuby]

The axle leak or something else?

Yes, the dreaded axle leak. 4k miles since, and so far so good...

 

[IanNubbit]

So I can say I experience the same. Along with taking off smoothly basically at ANY stop and go on the road. Feel like if I don’t rev above 2k, the truck wil fall on its face and jerk like an old school stick if you just dump the clutch too soon and sometimes stall at about half clutch engagement. it’s 100% all a tuning design over sight. Wonder how much work it would take for a possible recall or even just an RRT to update the PCM tune to be slightly better tuned for the good Manual drivers like us and not just have it tailored to the people that drive like A holes and rev the piss out of these trucks and shift at 6k

 

[NachoRuby]

So I can say I experience the same. Along with taking off smoothly basically at ANY stop and go on the road. Feel like if I don’t rev above 2k, the truck wil fall on its face and jerk like an old school stick if you just dump the clutch too soon and sometimes stall at about half clutch engagement. it’s 100% all a tuning design over sight. Wonder how much work it would take for a possible recall or even just an RRT to update the PCM tune to be slightly better tuned for the good Manual drivers like us and not just have it tailored to the people that drive like A holes and rev the piss out of these trucks and shift at 6k

As far as no torque below 2k, that's more just the way the 3.6 is. It just doesn't make power that low, and a recall isn't going to help. Maybe a turbo or a supercharger ?. You're going to have to rev it. I had an auto ram for a loaner, and it revs the crap out of itself all the time too. Have you seen our torque curve? Embrace the RPMs haha. I think it's worse with the 3.73s, of course. Mine has 4.1 gearing which does help (not sure which you have). The anemic low end is the same on our 2016 JK too.

I remember reading on a different thread, someone said "I paid for the whole tachometer, might as well use it".

The stumble is a diferent issue, which could be fixed with a pcm update, if they wanted to. Having driven it for a year/18000 miles, it becomes a non-issue after a while though.

 

[fabianovalless]

Just looking to see if anyone else has experienced this. I have a 2022 with about 1000mi on it. I won't go as far to say it's an "issue" but it seems a little odd. I found a post on another forum which describes the event in identical detail as I have experienced it (screenshot below). Essentially, shortly after engaging 3rd gear and when beginning to accelerate, I feel what seems like a single, pretty mild but noticeable, "jerk". No idea if it's engine control or driveline related. Anyone else experience this?

Jeep Jt rubicon 2022, You described all my concerns…! I took to the dealer, they didn’t Find anything, Have tried pedal commander nothing changed. But Like you said, Knowing right now that I’m not the only one it’s doesn’t bother me too much… I

 

[OHJeeper]

The first time it ever happened to me, it was also raining that day. I thought I was losing traction for a split second - almost felt like the rear tires "skipped" for a split second. I was also "relieved" to know this is common, but I still don't understand why Jeep programmed a map like this. My biggest annoyance with the 6MT.

 

[JTDay]

Yeah idk why it does it but it's fairly consistent. I also get another one when the cams change over at 2700rpm-ish. I just think it's not a smooth transition depending on accelerator pedal position, but it seems common enough that I don't worry about it. Soon after getting more familiar with the power delivery, I ended up getting deeper into the RPMs before shifting and it almost doesn't happen at all anymore.

Sponsored