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HEMI hestitated and "shook" during W.O.T.

12K views 50 replies 17 participants last post by  litespeedz 
#1 ·
I'm not sure yet if there is a need to worry or not--I'm hoping some discussion here will remedy that. I LOVE my overland, especially the V8. Yesterday, however (with 286 miles on it!), I am still breaking in the engine via the owner's manual and several recommendations here on this forum. For the first time twice while doing approximately 45mph, I'd open the throttle wide up and when I did, the HEMI for about 1-2 seconds did some shaking then it seemed to "kick in" and respond to my W.O.T. command. Out of the 4 times I did this yesterday, it did this twice! I definitely do not want to hurt or damage anything, but I don't want to be the guy who constantly calls or brings his new Jeep in for lack of knowledge or ignorance. I'll say again, I love this forum and respect the knowledge and appreciate the well of info you guys share so we can enjoy our vehicles!
 
#44 ·
It's not a problem with MDS. I can replicate it when in Manual mode and in Tow Haul mode. MDS is not active in the last two modes.

My theory is the majority of testing was performed on the new V-6. Of the supposed millions of miles of real world testing that was performed I would LOVE to know the ratio of V6's to V8's that were tested. I have 4,800 miles on the car and this has not gone away. I cannot believe that 1200 more miles will magically fix this.

This car is quickly becoming a problem child and I am starting to regret my purchase even faster.
 
#46 ·
Nope, that will probably be what they try first. The first three times I had the car in they would not even try to diagnose this problem. The dealer told me that this is the torque converter breaking in AND it has a 6,000 mile break-in period. They basically said, come back in 6,000 miles. I would have to look at the TSB release date versus my last visit to know if it is something that should have been performed.

I would love it if that fixed it. But others have reported it hasn't so I guess I am naturally skeptical. I am also a little frustrated because some other surprising problems have surfaced on my 3.5 month old car over the past couple of weeks. It's a pain to have to bring it back and leave it that many times early on in ownership. Makes me nervous about what problems I can expect a year or two down the road...

We'll see what they say next week...
 
#49 ·
Looks like it is something we have to live with for now. I'm just happy that it only happens when I floor it, not cruising around between 40-60 like it appears some other people have. Took my first long road trip this weekend, 500 miles round trip and the truck drove great. My one compaliant and maybe it is because I had it in sport mode when you are going about 70 or so and you give it about quarter throttle it seems to really rev quick and down shift, almost reacts like you are flooring it. I didn't notice it so much in Auto mode but auto seemed to be hunting for the right gear a lot around 60 or so.

I guess I am just used to my 01 4Runner with a 4 speed which didn't have as many gears or even close to the power. The Cherokee ride blows it out of the water on the road, have not tried it offroad, the 4Runner was a beast. Overall, very happy with the ride besides the shake when you floor it. I wish you could select 2wd though.
 
#50 ·
Just experienced this today. Going up incline, wot @ 45.... hesitation then shaking until it found the right gear to drop down. Ugh. Guess I'll wait and see.
 
#51 ·
The dealer tells me that this is bushings on the axle (maybe the front axle isolator??). I don't have the paperwork yet as I picked the car up after hours. They said the parts are on backorder. I am going to call tomorrow and have them e-mail me the paperwork. I will report back when I know more.
 
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