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A Warning To Those With A Stick

TexasAG90

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I purchased my first (note first as that is an important aspect of this thread) jlu Rubicon (6 speed manual trans) at the end of May. Within a week I had it on a 2.5" Mopar lift and 37's. Fast forward 2 months and 2,500 miles later and I ran into "the" issue. At the end of July I was taking an overnight trip with some buddies to Harrahs Casino in NC from Atlanta. An hour or so out from NC I started hearing a disturbing metal on metal sound coming from the jeep while in 4th gear. I first noticed it while climbing a fairly steep hill and having to transition between higher RPM's in 3rd and lower RPM's in 4th to maintain my speed up the incline. I also noticed a sudden lack of power while in 4th gear. It's important to note that I had made a similar type drive (in relation to hills and steeper climbs) to Nashville and back to Atlanta a few weeks prior without issue.

I was able to drive it back home but the sound persisted and never went away. I took it to my dealer who kept it for a week and, while acknowledging the sound and lack of power was certainly there, could not determine an issue. They gave it back to me to drive for a week after installing a program on the jeep which they claimed would tell them what was causing the problem. I took it back in a week later and they kept it for another week and replaced the transmission entirely. That still did not fix the issue at all.

The service manager told me it was normal and would not hurt the jeep. My argument to that was two-fold. One, I did not have this issue for the first 2,500 miles with the jeep and it had been lifted the entire time. If it was normal, the sound and lack of power would have been present the entire time. Second, if it was normal, why would they replace the entire transmission?

Anyways, I was left with two options. Go to war with Chrysler and try to get them to take the jeep back as a lemon. Which would have taken months and most likely would have required a lawyer. Or trade it in and buy an automatic. Luckily for me, I worked at this dealership years ago as it was my first sales job. The managers and most of the same sales reps are still there and I am still good friends with them. They sold me the original jeep at employee cost and have always been good to me and my family (my family as a whole has purchased more than 10 vehicles from them over the last 5 years). I decided to trade my jeep in and get an automatic. They actually gave me a thousand more dollars for the jeep than what i paid for it, the only bad pat of the situation is I had to leave my lift and tires on it. Ended up with another black Rubicon and went with a fully loaded option this time around as there were some things I realized I would like to have after I got the first one. It's back at the dealer today after buying it on Monday getting lifted again. I only ended up losing the money sunk into the lift when it could've been much worse financially. There is one silver lining to this story, I had bought my first house about 10 months ago and it hit my credit hard. My credit had climbed back to the 725 range by the time I bought the second jeep this past week so my interest rate was significantly better. I bought a jeep that cost $10k more than the original but my payments only went up about $100 a month so thats a win of sorts.

I posted all this just to make other jeepers running the manual transmission aware of the issue and that there really is no fix coming from Chrysler at this point. I could've kept the original Jeep but my fear was either being back in the shop every two months with this issue or putting a bunch of miles on it and the issue, overtime, building up and causing a massive failure while driving (most likely after my warranty had expired with my luck). So I chose to bite the bullet and not take the risk. I've had 3 JK's as well and my last one was a stick on 37's and I never had an issue so there must be something going on with the manual trans Jeep is putting in these new JL's.

Sorry for the long post but thought the Jeep community should be aware. Safe Jeepin' everyone!
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intentsrig

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Sounds more like an engine issue. Lose of power and metal on metal sound. Did it sound like pinging/ knocking? Quite a few people on here have been describing those symptoms.

I have seen one other guy on here that had a manual with an issue causing very slow accleration but I don’t think he had any noise. Once he hit 40 it would start gaining speed again.
 

Djmatt85

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I purchased my first (note first as that is an important aspect of this thread) jlu Rubicon (6 speed manual trans) at the end of May. Within a week I had it on a 2.5" Mopar lift and 37's. Fast forward 2 months and 2,500 miles later and I ran into "the" issue. At the end of July I was taking an overnight trip with some buddies to Harrahs Casino in NC from Atlanta. An hour or so out from NC I started hearing a disturbing metal on metal sound coming from the jeep while in 4th gear. I first noticed it while climbing a fairly steep hill and having to transition between higher RPM's in 3rd and lower RPM's in 4th to maintain my speed up the incline. I also noticed a sudden lack of power while in 4th gear. It's important to note that I had made a similar type drive (in relation to hills and steeper climbs) to Nashville and back to Atlanta a few weeks prior without issue.

I was able to drive it back home but the sound persisted and never went away. I took it to my dealer who kept it for a week and, while acknowledging the sound and lack of power was certainly there, could not determine an issue. They gave it back to me to drive for a week after installing a program on the jeep which they claimed would tell them what was causing the problem. I took it back in a week later and they kept it for another week and replaced the transmission entirely. That still did not fix the issue at all.

The service manager told me it was normal and would not hurt the jeep. My argument to that was two-fold. One, I did not have this issue for the first 2,500 miles with the jeep and it had been lifted the entire time. If it was normal, the sound and lack of power would have been present the entire time. Second, if it was normal, why would they replace the entire transmission?

Anyways, I was left with two options. Go to war with Chrysler and try to get them to take the jeep back as a lemon. Which would have taken months and most likely would have required a lawyer. Or trade it in and buy an automatic. Luckily for me, I worked at this dealership years ago as it was my first sales job. The managers and most of the same sales reps are still there and I am still good friends with them. They sold me the original jeep at employee cost and have always been good to me and my family (my family as a whole has purchased more than 10 vehicles from them over the last 5 years). I decided to trade my jeep in and get an automatic. They actually gave me a thousand more dollars for the jeep than what i paid for it, the only bad pat of the situation is I had to leave my lift and tires on it. Ended up with another black Rubicon and went with a fully loaded option this time around as there were some things I realized I would like to have after I got the first one. It's back at the dealer today after buying it on Monday getting lifted again. I only ended up losing the money sunk into the lift when it could've been much worse financially. There is one silver lining to this story, I had bought my first house about 10 months ago and it hit my credit hard. My credit had climbed back to the 725 range by the time I bought the second jeep this past week so my interest rate was significantly better. I bought a jeep that cost $10k more than the original but my payments only went up about $100 a month so thats a win of sorts.

I posted all this just to make other jeepers running the manual transmission aware of the issue and that there really is no fix coming from Chrysler at this point. I could've kept the original Jeep but my fear was either being back in the shop every two months with this issue or putting a bunch of miles on it and the issue, overtime, building up and causing a massive failure while driving (most likely after my warranty had expired with my luck). So I chose to bite the bullet and not take the risk. I've had 3 JK's as well and my last one was a stick on 37's and I never had an issue so there must be something going on with the manual trans Jeep is putting in these new JL's.

Sorry for the long post but thought the Jeep community should be aware. Safe Jeepin' everyone!
That sucks! However, I’m very glad to hear that your dealership took care of you. Bigger tires willput more stress on other drivetrain components which may cause premature failure (which I don’t think should happen 2k miles either way). That could have gone very differently and you’d be stuck with the bill if the dealer wanted to be an a$$hole.

On the other hand, my 6 speed has ~4k miles and not a single issue as of yet.

Thanks for the post.
 

OldGuyNewJeep

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“replaced entire transmission and issue did not go away”

How do you go from that to “beware of the manual transmission?”

Sucks you had an issue, but sure doesn’t sound like a transmission problem to me. As stated above, sounds more like an engine issue.

4K miles on my manual, and I couldn’t be happier.
 
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TexasAG90

TexasAG90

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“replaced entire transmission and issue did not go away”

How do you go from that to “beware of the manual transmission?”

Sucks you had an issue, but sure doesn’t sound like a transmission problem to me. As stated above, sounds more like an engine issue.

4K miles on my manual, and I couldn’t be happier.
Because they claim that the manual transmission is being overworked in 4th gear with the 37's and putting stress on the vehicle. The only suggestion they offered was re gearing but I wasnt willing to drop thousands on a hope that it would address the issue. I've read a few posts where other posters with the 6 speed are having an issue as well. Havent read one negative thing from people with the 8 speed and I am on numerous forums so I felt safe moving over to the automatic. I hope you dont have any issues, truly do. But from your picture you dont have a lift or bigger tires so you may not be at risk. You also have a 2 door and not a 4, no idea if that would make a difference, but we dont have anything close to the same set up so it's not really comparable.
 

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jebjkey

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Because they claim that the manual transmission is being overworked in 4th gear with the 37's and putting stress on the vehicle. The only suggestion they offered was re gearing but I wasnt willing to drop thousands on a hope that it would address the issue. I've read a few posts where other posters with the 6 speed are having an issue as well. Havent read one negative thing from people with the 8 speed and I am on numerous forums so I felt safe moving over to the automatic. I hope you dont have any issues, truly do. But from your picture you dont have a lift or bigger tires so you may not be at risk. You also have a 2 door and not a 4, no idea if that would make a difference, but we dont have anything close to the same set up so it's not really comparable.
If transmission was being "overworked" in 4th, then it would be "overworked" in 5th and 6th also. Yes, putting bigger tires on adds additional stress on the entire drivetrain, but so does accelerating more rapidly or climbing rocks/going through mud off-road. Either way, the transmission is designed to handle more than what the engine can produce.

Could have been the clutch, also. I doubt the clutch was replaced with the transmission and clutch components have the potential to make the same types of noises. An engine or a clutch problem would have persisted after the transmission replacement, also.

There are problems with the 8-speed auto. I have problems with it and there are threads on this forum from people having similar problems as me.
 
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TexasAG90

TexasAG90

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If transmission was being "overworked" in 4th, then it would be "overworked" in 5th and 6th also. Yes, putting bigger tires on adds additional stress on the entire drivetrain, but so does accelerating more rapidly or climbing rocks/going through mud off-road. Either way, the transmission is designed to handle more than what the engine can produce.

Could have been the clutch, also. I doubt the clutch was replaced with the transmission and clutch components have the potential to make the same types of noises. An engine or a clutch problem would have persisted after the transmission replacement, also.

There are problems with the 8-speed auto. I have problems with it and there are threads on this forum from people having similar problems as me.
What issues are you having?
 

Jolonghorn

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I have 10k miles on my MT JLUR, including a trip to Ouray and back from Texas and no problems at all. I hope this doesn't appear though.
 

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Because they claim that the manual transmission is being overworked in 4th gear with the 37's and putting stress on the vehicle.
You also mentioned it happened "while climbing a fairly steep hill" and that you were not re-geared... sounds to me like engine detonation under heavy load. Detonation/pinging does take place under load and they say it's even normal in lower rpms. My guess is the bloody EGR is sending warm air, thinking you're just cruising, and causing detonation at higher speeds.
 

Karl_in_Chicago

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Replace the whole tranny and then say "it's normal"? Not to discount your long relationship with that dealer but I would have gotten a second opinion from another service department.
 

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You also mentioned it happened "while climbing a fairly steep hill" and that you were not re-geared... sounds to me like engine detonation under heavy load. Detonation/pinging does take place under load and they say it's even normal in lower rpms. My guess is the bloody EGR is sending warm air, thinking you're just cruising, and causing detonation at higher speeds.
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.
 

jebjkey

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What issues are you having?
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.
 

Litfuse

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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.
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.
 

vavaroutsos

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Because they claim that the manual transmission is being overworked in 4th gear with the 37's and putting stress on the vehicle. The only suggestion they offered was re gearing but I wasnt willing to drop thousands on a hope that it would address the issue. I've read a few posts where other posters with the 6 speed are having an issue as well. Havent read one negative thing from people with the 8 speed and I am on numerous forums so I felt safe moving over to the automatic. I hope you dont have any issues, truly do. But from your picture you dont have a lift or bigger tires so you may not be at risk. You also have a 2 door and not a 4, no idea if that would make a difference, but we dont have anything close to the same set up so it's not really comparable.
This doesn't add up. The Rubicon comes with 4.10 axle gears. Changing the tires to 37" tires doesn't even increase the leverage the tires have to the level of the Sport/Sahara with 3.45 axle gears and 32" tires (32/3.45 > 37/4.10).
 
 







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