- Joined
- Jun 26, 2020
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- 204
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- Location
- Dearborn Heights, MI
- Vehicle(s)
- 2019 Wrangler JLU Moab/2021 392 Rubicon
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When I switch to Manual mode, I'm only able to shift up to 2nd gear while at a stop. Otherwise I get "Shifting Not Allowed" displayed in the dash when trying to shift to up past that. Once I start driving, I'm only able to shift up a gear or 2 above where it thinks I should be.If I use the manual gear selector and set 8th as highest in my RAM it kills the annoying VVT 'Eco' mode. Not sure it would work the same in a Wrangler 392 but worth a shot.
Quote pleaseThe shameless plug solution is, if you get a PCM unlock, tuner, and bypass cable from Livernois Motorsports, we absolutely can disable it for you. Better yet, our 392 is in transit, and ready for us to start tearing into it for upgrades!
"Paddle" shifters are there for this reason.When I switch to Manual mode, I'm only able to shift up to 2nd gear while at a stop. Otherwise I get "Shifting Not Allowed" displayed in the dash when trying to shift to up past that. Once I start driving, I'm only able to shift up a gear or 2 above where it thinks I should be.
If I'm at speed and have it in 8, as I slow down it downshifts, but then stays in that gear if i accelerate again. So it doesn't look like I can just kick it into manual mode in M8 and let it auto shift.
To clarify how MDS works:When MDS is active the pushrod is partially disengaged, the roller is still in contact with the cam but a solenoid moves a part of the pushrod out of the way to prevent the valves from opening. Oil still gets to the moving parts as needed. My old Ram gave me no troubles and I hardly noticed any significant difference in exhaust note (although I was still stock). I can imagine a Tazer for the 392 is in the works that can prevent MDS and probably already exists for other models with Hemi engines.
Mechanically, you shouldn't be worried over the MDS.
A little bit of an update, was able to make it to the track, only made one pass, and the DA was over 3000', but still happy with the only pass under it's belt. This was on our new flex fuel tune, but with 93 in the tank.Has anyone been running Livernois tunes? Pulling the trigger but want to make sure everyone's happy with the experience.
Almost never. If it's like the Challengers you need to be over 60 mph and have very litle load on the motor.How often do the cylinders deactivate in city/suburban driving?
I experienced the exact opposite, mine was almost constant. MDS starts at as little as 14mph, can be active as high as 3800rpm, and can be up to about 1/3 pedal. it all depends on load, but these are in it more aggressively than most other applications.Almost never. If it's like the Challengers you need to be over 60 mph and have very litle load on the motor.
So... not like the ChallengersI experienced the exact opposite, mine was almost constant. MDS starts at as little as 14mph, can be active as high as 3800rpm, and can be up to about 1/3 pedal. it all depends on load, but these are in it more aggressively than most other applications.
The challengers aren't too much different. pretty much the only difference is that they don't activate until about 27 mph, and will disable at about 5% lower torque than the Jeep does. I am sure if you are aggressive it may not happen often, but it definitely happens a fair bit on the cars too.So... not like the Challengers
Range technology is for GM&some F150’s only.They are missing out on a large mopar/Jeep sales.I use a Range Technology disabler device on my Zo6 and Denali. It plugs into the obd2 port and it always stays on eight cylinders when installed. I don't know if they make one for the Jeep. You can contact them at 888-997-6515. I hope this doesn't go against forum rules and if it does I apologize. Also it doesn't leave any codes on the computer.
Saw video on FB. Killer time for a big box! Curious to see how much HP corn will make. I know SP's with the 6.4 and just bolt ons are running 11's. Yes different vehicle but close to 500whp. So will Livernois be working on a CAI and possible exhaust system? Coming off the right side of the block that 90° turn can't be good for airflow.A little bit of an update, was able to make it to the track, only made one pass, and the DA was over 3000', but still happy with the only pass under it's belt. This was on our new flex fuel tune, but with 93 in the tank.