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Just returned from my local Jeep dealer to get an oil change. While I was there they told me that Chrysler has issued a free PCM (power control module) update for the Manual JKs. They said that this fixed a problem where the engine was not given enough gas to produce the correct amount of power. What I can tell after driving it is that everything feels much smoother and the gears especially feel better. Its a bit hard to explain but there has been a lot of talk on the WF lately about how people have trouble shifting between 1st and 2nd smoothly. Enough people asked who were experiencing this too so I thought I would post this info up.
After I got the update, every gear shifts smoothly and evenly. There is no catching or weird resistance between 1st and 2nd and my 6th gear is much more responsive. Actually, all gears have more power it feels like. I think that some of this was happening from the gears not receiving the proper amount of gas you thought you were giving when applying it during shifting. Also, the ECO mode that most people find amusing on Jeeps was taken off mine. The service department said that the recent Manual JKs should not have this option. It is only a working option for auto trannys and if you have the ECO light on yours and you have a manual, it will be taken off when you get the update.
Not sure yet but MPG seems to even be a bit better now as well. This might be all in my head but I'm getting 20.2 in the city with my stocker which is unreal. I've calculated this from miles driven and gallons used not just the reading on the dashboard. Thought I'd share. If any one has a new manual tranny JK and wants more info on this update with your dealer, make sure to contact them soon.
After I got the update, every gear shifts smoothly and evenly. There is no catching or weird resistance between 1st and 2nd and my 6th gear is much more responsive. Actually, all gears have more power it feels like. I think that some of this was happening from the gears not receiving the proper amount of gas you thought you were giving when applying it during shifting. Also, the ECO mode that most people find amusing on Jeeps was taken off mine. The service department said that the recent Manual JKs should not have this option. It is only a working option for auto trannys and if you have the ECO light on yours and you have a manual, it will be taken off when you get the update.
Not sure yet but MPG seems to even be a bit better now as well. This might be all in my head but I'm getting 20.2 in the city with my stocker which is unreal. I've calculated this from miles driven and gallons used not just the reading on the dashboard. Thought I'd share. If any one has a new manual tranny JK and wants more info on this update with your dealer, make sure to contact them soon.