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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 03-17-2013, 05:28 PM
TORMENTOR TORMENTOR is offline
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Default 45-50mph shudder going WOT

So I've bounced around the forums, trying to find a proper fix for this issue but nothing solid yet.

Basically, my trucks had an issue when going WOT while cruising around 40-50 mph. Usually it only existed when the truck Wasnt fully warmed up but did pop up intermittently at times.

2 weeks ago, I took it to the dealer for the issue because I had ordered my Hemi fever tune and wanted to make sure this Wasnt something physically wrong in the tranny before installing it.

The dealer calls me back and says its fixed, that Chrysler released a PCM update to address this issue. So I pick it up and Tada! It's fixed, no more shutters and hunting for a gear and the torque converter deciding if it wants to unlock or not.

The issue after that though?, the truck seemed to have lost a lot of its "balls" it shifted so spongy, when holding it in 1st and punching it, you could feel it slip a bit before engaging, like they turned up the TM even more. Overall, it just Wasnt nearly as firm anymore. It felt like I was driving a prius.

So fast forward to this last week where I finally install the Hemi fever tune. WOW, trucks woken right up, more power from every rpm range, pulls like a freight train, BUT!! Guess what issue came back? And more prominent and aggressive then before.

And worse, it's consistent now, anytime I'm cruising around 50 mph, it shudders pretty bad for a few seconda and then the rpms shoot up and it goes.

What and the HELL is this trucks issue with this? I've seen this issue come up a lot for other owners, right now, Sean and I are trying to figure out how to work around this without having to put it back to stock shift points etc...

Btw here is a short video I got yesterday of what it does:
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  #2  
Old 03-17-2013, 09:02 PM
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Phildo Phildo is offline
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Probably a torque converter issue. Could be slipping under wot gear changes
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  #3  
Old 03-17-2013, 09:13 PM
TORMENTOR TORMENTOR is offline
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But why would the dealers PCM flash fix it? By turning up the TM?
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  #4  
Old 03-18-2013, 07:49 AM
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ericlee9386 ericlee9386 is offline
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Quote:
Originally Posted by TORMENTOR View Post
So I've bounced around the forums, trying to find a proper fix for this issue but nothing solid yet.

Basically, my trucks had an issue when going WOT while cruising around 40-50 mph. Usually it only existed when the truck Wasnt fully warmed up but did pop up intermittently at times.

2 weeks ago, I took it to the dealer for the issue because I had ordered my Hemi fever tune and wanted to make sure this Wasnt something physically wrong in the tranny before installing it.

The dealer calls me back and says its fixed, that Chrysler released a PCM update to address this issue. So I pick it up and Tada! It's fixed, no more shutters and hunting for a gear and the torque converter deciding if it wants to unlock or not.

The issue after that though?, the truck seemed to have lost a lot of its "balls" it shifted so spongy, when holding it in 1st and punching it, you could feel it slip a bit before engaging, like they turned up the TM even more. Overall, it just Wasnt nearly as firm anymore. It felt like I was driving a prius.

So fast forward to this last week where I finally install the Hemi fever tune. WOW, trucks woken right up, more power from every rpm range, pulls like a freight train, BUT!! Guess what issue came back? And more prominent and aggressive then before.

And worse, it's consistent now, anytime I'm cruising around 50 mph, it shudders pretty bad for a few seconda and then the rpms shoot up and it goes.

What and the HELL is this trucks issue with this? I've seen this issue come up a lot for other owners, right now, Sean and I are trying to figure out how to work around this without having to put it back to stock shift points etc...

Btw here is a short video I got yesterday of what it does:
I have this same issue. I added a 2800 stall and had Sean hold the gears longer and account for the stall in the tune and it cleaned up the shudder mostly. It still does it from time to time but I have been living with it until it gets figured out. I personally think its the trans skipping 3rd gear and not having the rpm or speed high enough. That's just my guess. Good luck
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  #5  
Old 03-18-2013, 09:10 AM
catsltd catsltd is offline
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I would try it in tow haul mod.
I bet its fine.
The stock converter is junk,if your running one get rid of it.
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  #6  
Old 03-18-2013, 02:03 PM
TORMENTOR TORMENTOR is offline
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I will try the tow/haul mode

Thanks
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  #7  
Old 03-19-2013, 10:10 AM
S.C. Express S.C. Express is offline
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Sometimes I swear mine will skip 2P and go from 2nd to 4th at those speeds. Italmost bogs because of the massive ratio change. Does it do it if you shift it manually?
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  #8  
Old 03-19-2013, 07:23 PM
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ericlee9386 ericlee9386 is offline
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Quote:
Originally Posted by S.C. Express View Post
Sometimes I swear mine will skip 2P and go from 2nd to 4th at those speeds. Italmost bogs because of the massive ratio change. Does it do it if you shift it manually?
Mine won't do it if I shift it manually but I don't like doing that all the time. I wish the skip could be tuned out if the programing
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  #9  
Old 03-19-2013, 11:16 PM
TORMENTOR TORMENTOR is offline
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I emailed Sean about it to see if there is anything that he can for it
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  #10  
Old 03-19-2013, 11:17 PM
TORMENTOR TORMENTOR is offline
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Default

Regardless of this issue that i know is no fault of Sean's since it existed well before the tune. His custom tune is amazing, im shocked at the difference in performance, even between the diablo one and his
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