23 Mojave 6-speed issues, thoughts, Repairs

[Birds83]

My Vin says 19A was performed, so I’m learning on the “new” clutch.

Yeah they did mine prior to purchase as well. I wasn’t a big fan of the setup but wasn’t going to mess with it. Then it threw the hot clutch and service trans light while off roading and that was enough for me to begin the journey of upgrading the clutch and trying to figure out/get the service light fixed.

Sponsored

 

[Birds83]

Todays update :

my service light come on still anywhere from 1 mile to 100 miles between resets.
always seems to be taking off from a stop in first.

Today 2 times I’ve had it reset with out using JScan….
Both time I started the Jeep and shifted into reverse almost immediately to back up.
After reversing I shifted into first and the service light was not on. Please note I have park sense so shifting into reverse turns on the park sense in the display. No idea if this does something strange with the code or not. But it’s worth a try and I’ll keep messing with it.


Lastly see attached. On Facebook ended up talking with owner of Tazer. He has a 6speed wrangler and is going figure out what his product can do to shut this light off for himself and us. So stay tuned!
Attached is the conversation. Cheers ?

 

[Birds83]

Dealer visit scheduled for 5/29/24
For service transmission light ?

 

[hjdca]

I feel for you..... and this is probably no help, but, fyi, I have the original stock clutch in a 2020 JTR with 5:13 gears, 37s, and 67K miles - 47K miles on the 5:13s and 37s. I have done Pismo numerous times (mostly 4WH) and many, many trails, mostly in 4WL. Even in 4WH with the clutch out, you can bog the truck and the clutch will not heat up because it is not slipping. While rock crawling in granny gear, I normally let out the clutch fast and manage the speed with the brake, sometimes stalling if I mess up. I have never seen messages like that, but,
I do not have any of the software clutch updates installed.

 

[Birds83]

I feel for you..... and this is probably no help, but, fyi, I have the original stock clutch in a 2020 JTR with 5:13 gears, 37s, and 67K miles - 47K miles on the 5:13s and 37s. I have done Pismo numerous times (mostly 4WH) and many, many trails, mostly in 4WL. Even in 4WH with the clutch out, you can bog the truck and the clutch will not heat up because it is not slipping. While rock crawling in granny gear, I normally let out the clutch fast and manage the speed with the brake, sometimes stalling if I mess up. I have never seen a messages like that, but,
I do not have any of the software clutch updates installed.

I can’t say for sure obviously but I’m willing to bet it’s all programming issue for us having this issue.
seems to only
Happen to those who have had the recall done.

 

[Gatorized]

I can’t say for sure obviously but I’m willing to bet it’s all programming issue for us having this issue.
seems to only
Happen to those who have had the recall done.

Does anyone know for certain what exactly the clutch recall entails? Is it a new clutch, new software, or both? If you have a nose, you don’t need no stinkin’ software to tell you the clutch is slipping!

 

[Birds83]

Does anyone know for certain what exactly the clutch recall entails? Is it a new clutch, new software, or both? If you have a nose, you don’t need no stinkin’ software to tell you the clutch is slipping!

Software update, pressure plate and clutch. Not sure about flywheel I’d have to go look…

 

[Birds83]

About 5 days ago I dropped the tire size in the computer to 34”.
Mind you they are 35x11.50r17 nitto trail grapplers. Factory spec is 34.76 inflated which I ran in the computer since new.
They measured about 34.5” on my vehicle with my psi which I tried this size for a short time and the issue continued.

As of now with the 34” tire size programmed and 6th gear relearn I’ve went 170 miles post relearn and haven’t had the service transmission light come back on yet This is the furthest I’ve made it so could be luck or maybe just maybe it’s fixed.

I’ve got a 600-700 mile round trip to Hatteras (where my problems all
Began ) and some beach driving again to really see how it does on sand and aired down. IF it does good I’ll consider it a fix and cancel my dealer appointment however I’m not confident just yet,but hopeful.




To note as far as speedometer and gps.
From factory with 33s the
Speedometer at 70
GPS reading 71mph

With 35’s programmed to 34.75”
Speedometer 70mph
GPS reading 70mph

With 35’s programmed to 34”(currently)
Speedometer 70
GPS reading 71-72mph



Important - Tazers new firmware will allow the clutch reset procedure to clear the service transmission light. So if you have that instead of JScan you can clear it and keep rolling.


Also this was posted on Facebook earlier talking about our issues and one of our members…..
The Autopian

 

[Josh00333]

Hmmm I wonder if the rotation of the transmition isn't jiving with what the computer thinks it should be hence the error. But you changing the tire size got it back into "spec"?


Use your trip meter on the truck and a trip counter on your gps (phone) next time you do a road trip or 100 mile drive. Then compare the two. I wonder if they will match up now?

Just looking at the speedo and the gps can still have a lot of stacking error.

I was what I thought matched up, then did the trip meter and found I was off a bit. I was then able to set my rig up to be spot on.

 

[Birds83]

Hmmm I wonder if the rotation of the transmition isn't jiving with what the computer thinks it should be hence the error. But you changing the tire size got it back into "spec"?


Use your trip meter on the truck and a trip counter on your gps (phone) next time you do a road trip or 100 mile drive. Then compare the two. I wonder if they will match up now?

Just looking at the speedo and the gps can still have a lot of stacking error.

I was what I thought matched up, then did the trip meter and found I was off a bit. I was then able to set my rig up to be spot on.

Speedometer is pretty close just checked yesterday. Went 190 miles on odometer and Apple Maps had me at 195miles.
averaged 20.8mpg which wow !

 

[Birds83]

Preliminary update.
450 miles since everything was reset and changed and I’ve been out on the beach in 4Hi yesterday. No issues “yet”.

maybe onto something with changing the tires size just. Little smaller than actual measurement. I don’t know. But I’m aired down to 17psi right now and so far so good guys.

 

[The Sigma]

All my Jeeps have been manuals. The Gladiator stock clutch is usable if you have nothing to compare it to, it's terrible if you know what a clutch is supposed to feel like. I waited and waited for a true manufacturer fix (as opposed to the "neutering" fix via software they offered). Finally bit the bullet and went with a Centerforce. Gladiator drives like what I imagine it was supposed to drive like. Amazing how much happier a person can get.

 

[Birds83]

All my Jeeps have been manuals. The Gladiator clutch is usable if you have nothing to compare it to, it's terrible if you know what a clutch is supposed to feel like. I waited and waited for a true manufacturer fix (as opposed to the "neutering" fix via software they offered). Finally bit the bullet and went with a Centerforce. Gladiator drives like what I imagine it was supposed to drive like. Amazing how much happier a person can get.

100%
Loving the ACT Hd clutch I went with feels considerably better or normal I should say.

 

[PuddleJumper]

I don’t know I drove a manual an 8 speed auto back to back at the dealer, and even though all the reviewers say the auto handles the engine better I don’t agree. In some certain situations, will I be proven wrong, maybe…probably. The manual just felt more zippy and fun, and I got to speed faster.

Could be completely anecdotal and likely is. The auto just felt as if it hunted around more and with the accelerator peddle/throttle more sluggish. I wanted it to stay in the high rpm’s longer which the 3.6 like

The ZF are great transmissions and generally pretty bullet proof but I’ve read about their little issues too in Jeeps and other cars.

I will say that with the 6 speed you really need to get on it to wake the Gladiator up. The engine wants to get up to 5000-6000 prior to a shift. The 3.6 reminds me of the older Civic V tech where it has this boost kind of kick in. Depending on the gear you get some torque 3000-4000 and another sort of turbo lag boost at about 5000rpm. The 6 speed with the 3.6 also remind me of the Honda S2000 because you had to really get up there high in the RPMs to make its peak horsepower and torque. It took effort and good feel of the car - they are a freaking blast to drive because of it.



The motor really likes to rev, and it probably feels uncomfortable for some to make 1-2 2-3 3-4 shifts so close to the red line but man it’s fun!!!! It does tske more effort, and more focus, know what gear your in and paying attention to where each gear makes power. I do read the best 0-60 time for our Gladiators was set in a 6 speed in a lighter curb weight sport model. To get that, they probably had to try pretty hard and practice.

Its not like I pretend I’m at a drag race every time I start out in 1st gear, but I suspect the average 8 speed equipped driver isn’t mashing the pedal to the floor every time they start out from a stopped position either. Most of the time I’m shifting at 4000 rpm and trying to be as smooth as possible, and that’s taken some time to learn on the clutch. It’s a truck not an VW Golf R. Engagement is a little mushy and also abrupt - hard to describe but takes getting used to The shifter itself is as comfortable as and manual I’ve driven. Reverse is easy now after a couple weeks of driving. 1st gear is still hard to shift butter smooth with the 4:10’s. It also just shifts better when driven more aggressively which need less slippage to do. That could be irritating to some and a fair criticism.

What I do know is the 6 speed can chirp the tires in the first 3 gears and the auto can’t lol. Is that meaningful in 0-60 times or every day driving well no, but it sure is fun as hell!

I agree with you. The Auto handles the engine fine but for more spirited individuals its a very "cautious" transmission. You can fix that but a manual just makes driving how you want so much easier and rewarding. especially with a nice heavy flywheel added. I got an Auto because i needed the towing capacity and double overdrives makes for a much more efficient cross country trips i take. There's a gear for any situation, you just gotta teach it to function for you or do it manually. running a Pedal Monster can help or just resetting your tire size to reset the map and then driving accordingly to what you want to expedite its self learning. The auto was annoying to learn cus my first drive it would smoke the tires every launch and over time it rolls ya in gently. So Its a bit of fiddling to get it to do what you want when you want. The auto can chirp in all gears under 5. But you gotta turn off all the nannies to get her to lock up in every gear. I feel the ZF8 is better paired to higher powered motors. I imagine the 392 paired to it, is quite nice.

 

[Birds83]

Everytime I adjusted the tire size yes.

Sponsored