A Warning To Those With A Stick

[Jeepsterfreak]

Rocker arms?

VVT solenoid?

https://www.jlwranglerforums.com/forum/threads/variable-valve-lift-solenoid.13939/

Sponsored

 

[Rockmaninoff]

The tune on the JL is not good. Hopefully Jeep comes out with an update.

I’m surprised there is not a person who does performance tunes on the 3.6l.

On the JK they do and the supercharger makers are already on to it.

 

[DanW]

shuddering/jerky driving at light loads and slower speeds. 15-25 mph going up slight inclines in my neighborhood mostly. Feels like the transmission or torque converter is slipping or the engine is not tuned correctly. Hard to differentiate the two without monitoring some parameters.

There is no torque converter in a manual transmission.

OP, if the tranny was replaced, clearly it wasn't the problem. I'd go to another dealer, or go to @JeepCares to get some help. There are lots of people running 37's, so I doubt that's the issue. They just failed to isolate the problem. Keep working it. My money says the right person or people can figure that one out.

Did they replace the clutch, too, or keep the orignal with the new tranny? They might take a look there, too, if they didn't replace it. I'm not sure how power loss would occur, but it could be the source of the noise or vibration. If I were a stumped tech, I'd probably replace the engine computer, too, just to see what happens.

 

[jebjkey]

There is no torque converter in a manual transmission.

OP, if the tranny was replaced, clearly it wasn't the problem. I'd go to another dealer, or go to @JeepCares to get some help. There are lots of people running 37's, so I doubt that's the issue. They just failed to isolate the problem. Keep working it. My money says the right person or people can figure that one out.

Did they replace the clutch, too, or keep the orignal with the new tranny? They might take a look there, too, if they didn't replace it. I'm not sure how power loss would occur, but it could be the source of the noise or vibration. If I were a stumped tech, I'd probably replace the engine computer, too, just to see what happens.

I have an automatic. I was responding to a question someone posted earlier, not talking about the OP's manual transmission. Also, I mentioned the clutch as a possibility in an earlier post.

 

[DanW]

I have an automatic. I was responding to a question someone posted earlier, not talking about the OP's manual transmission. Also, I mentioned the clutch as a possibility in an earlier post.

Ahh, ok. Sorry for the confusion.

 

[sirryan]

I drive the hills of TN and used to stay in 4th going 50-60 the whole 35 mile drive home...now, after installing my lift and tires, I noticed a massive decrease in power at 55-60 if I were to stay in 4th going uphill. Now, I have to a bit more down shifting, (3rd at 50 -55 or so) but I haven't heard any metal to metal noises.

 

[jebjkey]

Ahh, ok. Sorry for the confusion.

 

[JeepDrvr2018]

Ok, may not be germane, 2013 JKSU, 6-speed. I live in the N-GA hills, so mine hardly every gets into 6th gear. I have 66K miles on it, and I have never had a metal on metal sound out of my jeep. I would not have a vehicle with an AT, since that takes all the fun out of driving a jeep in the first place. I suspect based on your description, you had a possible bad throw out bearing, and clutch assembly. NO, Jeep would not have replaced the TO/Clutch when changing the tranny. Suspect it also may have been something in the engine, and they did not want to deal with it. Like others, I would have gone to different dealership. You may like the AT, just remember to change the fluid about every 30K miles regardless of what the owners manual says, there is a filter in their too, change it as well. Good Luck.

 

[iznthesky]

It would have been more meaningful if TexasAG90 really knew what went wrong with the transmission....if it was anything to do with the transmission. It could have been any number of other things and he did not actually find out what was wrong. I don't even know why I am responding....TexasAG90 got a new transmission but that didn't fix it...so by process of elimination, it was something OTHER than the transmission.....ergo his post is almost entirely wrong. Don't know what to think of this?

 

[RI Music Guy]

No lift on my (stock) 6-speed manual JLU Sahara...over 5,200 miles now with (thankfully) no issues. In fact, I have noticed in slight increase in power after the 5000 mile mark when taking off in 1st and 2nd. Wondering if it's programmed to "take it easy" for the 5,000 mile break in period...

 

[Nomad]

No lift on my (stock) 6-speed manual JLU Sahara...over 5,200 miles now with (thankfully) no issues. In fact, I have noticed in slight increase in power after the 5000 mile mark when taking off in 1st and 2nd. Wondering if it's programmed to "take it easy" for the 5,000 mile break in period...

I’d be interested in that answer. I just picked up mine 2 days ago and it feels plenty strong. Of course I’m coming from a much slower vehicle. It’d be cool to get a free power boost in a few months.

 

[Capt-Zoom]

The tune on the JL is not good. Hopefully Jeep comes out with an update.

I’m surprised there is not a person who does performance tunes on the 3.6l.

There are. Diablo tuners has new tunes plus you can get custom tunes done. They definitely have them for the 3.6. Maybe not for the jl itelf yet but im sure they would soon if not now.

 

[Muzzle of Bees]

Yep. That’s what I would think it would be. Although, I can’t imagine a dealer replacing a transmission without having proof and approval from an area service writer.

Trust me it happens. I had a Volvo that had the appearance of a tranny problem. The dealer changed out the tranny first. It had the same symptoms the following day it was delivered to me and it ended up being the throttle positioning sensor that failed. It seems that the dealer will make money from it or they would not do the work.

 

[Litfuse]

There are. Diablo tuners has new tunes plus you can get custom tunes done. They definitely have them for the 3.6. Maybe not for the jl itelf yet but im sure they would soon if not now.

Who does custom tuning for Wranglers? I would be interested for sure! I don’t want any canned tunes.

 

[Capt-Zoom]

Theres a guy at diablo that will build custom ones for u using your data log. He turned my challenger rt into a beast.
Dan at Dakota customs likely does as they have every other jeep.

Realistically once the jl is cracked nearly any dyno shop should be able to with a diablo tuner

Sponsored