When I take off, say, at 1/4 or 1/2 throttle, and the car goes from 1st to 2nd... once it hits second it feels normal, then for a second or two it seems to drop down lower in the rpm band, almost like the torque converter is locking up. What is this? Why is it setup this way? Is anyone else experiencing this? I thought I read about it somewhere but couldn't find it when searching.
Question about 2nd gear "lag"...
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All I know, and forgive my lack of automotive knowledge here, is that occassionally, entering the on-ramp of a free-way/highway from a dead stop, I do get a drop off in power from when I first accelerate. It is annoying, particularly when I am being a bit more aggressive and I am counting on the power and it is not there. I am hoping the magnaflows, Ram air intake and possibly the headers will improve this.
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It is a software issue. What year is your car? what month was it built?Weedo said:
There is a TSB about hesitation under moderate throttle. It happens occasionally with my car, despite software upgrades. If I pull fuse 11 - leave it out for a few minutes then put it back in - it forces the main computer to reset and the problem goes away for a few weeks.
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2,113 Posts
yep sure is....# 18-031-05 ..after i got mine flashed i can tell the difference
go have this tsb done it should help..
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Weedo said:
Here ya go... funny this fricken happended to me EXACTLY, I thought the motor stalled for a bit:
"TSB#: 18-031-05
Date: July 21, 2005
Subject: Flash: Shift Hesitation During Wide Open Throttle
Overview: This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software.
Models: 2005 - 2006 (LX) SRT-8 (300C/Magnum/Charger)
NOTE: NOTE: This bulletin applies to vehicles equipped with a 6.1L engine (sales code ESF) and a NAG1 automatic transmission (sales code DGJ) built on or before July 25, 2005.
Symptom/Condition: Randomly during a wide open throttle condition the engine RPM goes beyond the fuel cutoff point before the 1-2 upshift is made. This causes a short hard bump at the beginning of the shift. It is more likely to occur if the vehicle is traveling around 15 MPH and then the throttle is pushed to wide open (WOT). This condition is caused by the TCM not being able to calculate the correct engine speed at which to initiate the shift"
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1,364 Posts
I don't think he is referring to the WOT TSB you posted. He is stating at part throttle, 1/4 to 1/2 throttle, and not WOT. Our MSRT-8 does this as well and I believe it is slipping into 3rd gear. There is also a TON of timing pulled on each shift, even at light throttle, and you can really feel it as you get used to the car. We need somebody to come up with tuning ability for the PCM to pull all this torque managment crap out of there. The difference in our Hemi Ram with the Superchips flashpaq is incredible and really highlights the stuff in the SRT-8.
Todd
Todd
Yep, that's exactly what it is. It's hard for me to tell if it's bogging in 2nd or quickly shifting into 3rd and bogging.WhiteDiamond said:
When I had my '05 Supercharged Mustang GT reprogrammed from the Predator to the Superchips, it fixed all of these same issues. It even held gear longer even at just partial throttle: something I wish the SRT would do. Sometimes I'll turn a corner and when I come out of the corner slowly, it stays in 3rd gear at what seems to be around 12mph and slowly "bogs" its way up there. Not a big deal, but all stuff that could be fixed with a better tune, like Todd mentioned.
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1,364 Posts
I cannot tell you that it is for sure sliding on up to 3rd gear real quick, but trying to watch the tach and feeling how it pulls through that episode is why I guess that. I see the rpm drop twice in rapid succession and then you get a bit of acceleration after a good 2 second or longer 'hesitation.' Our Hemi Ram had very similar behavior during its shifts, but it wouldn't jump up gears nearly as quickly as this SRT-8 seems to be set up to do. The Superchips tuning gets rid of that timing retard during the shift, firms the shift up, speeds the shift up and keeps the truck in each gear for a few extra rpm. It really makes a dramatic change and it is the reason for my post a few days ago trying to encourage SRT-8 owners to call Superchips and request something along these lines. Even if they don't give me more HP, but they minimize this hesitation and tranny shifting stuff, I would buy it twice!!Weedo said:
Todd
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400 Posts
You might try this...
Put the car in Park
Turn the ignition to on (one before start)
Press the pedal to the floor and back
Turn the ignition off
Start car and test
Seems that like the window "auto up" (if it stops working just roll it down and then hold it UP for 3 seconds after the window rises to the top) there are some things that can be fixed in your driveway...I'm sure dealers are getting frustrated with these simple fixes that take seconds to fix. I did this and the "lag" happened. I did it again and it went away. It is free and it just may work for you.
Put the car in Park
Turn the ignition to on (one before start)
Press the pedal to the floor and back
Turn the ignition off
Start car and test
Seems that like the window "auto up" (if it stops working just roll it down and then hold it UP for 3 seconds after the window rises to the top) there are some things that can be fixed in your driveway...I'm sure dealers are getting frustrated with these simple fixes that take seconds to fix. I did this and the "lag" happened. I did it again and it went away. It is free and it just may work for you.
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Where did you hear about this? There is a key trick with the early Hemi Rams and I wouldn't be surprised if this is something in there to change the way the PCM behaves. Just wondering where you heard it.sorbs said:
Todd
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Well, if it works on the 6.1L as well, more to it. I tried it and it didn't do anything with ours, so maybe it helps others.....HEMEEE said:
The proceedure is the learn routine.
The Key trick with the Hemi truck is supposably something Dodge put in the PCM to tell it to change certain points(shift and redline, but it didn't do anything on our 2004....supposed to work on 2003s).
Todd
Yep, I tried this with my SRT-8 and it didn't work (disconnected the battery, throttle to floor, etc).WhiteDiamond said:
After checking further, it is definitely in 2nd gear at normal to light throttle that I get this "bog". It's almost as if once it goes into 2nd and hits, say, 2000rpm, it then feels like it drops to 1800rpm, then starts creeping back up in the rpm range.
Did anyone find the specific TSB for this or are the other TSB's only for the "shift issue"?
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So far, this is the only tranny flash I have seen for the 6.1L drivetrain. I was told another tranny flash would be coming before the year end. I'm not convinced, however, that this is specifically a problem other than DCX programming the tranny to upshift quickly due to low end torque and MPG estimates. You and I must get our foot into it about the same amount once and while and just get this. I don't have this issue with less or more throttle application than you mention, but I still hate the torque modulation during the shift(engine falling flat.....).Weedo said:
Todd
Exactly. And once it's in 3rd at, say, 18mph, I sit there wondering to myself "why did it feel the need to shift into 3rd so soon?" or "why did it not shift into 2nd as I turned this corner at 12mph?". Just a couple more observations of how a "chip" or "program" could significantly help even normal speed driving. When I hammer it, there are NO problems though! :banana:WhiteDiamond said:
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132 Posts
Well, doesn't look like this will be a solution anytime soon. Seems like they don't see a large enough market.
We are watching the demographic of the car, try us back in a few months.
Technical Service
Ron Rapp
1-888-227-2447 ex. 7019
Superchips Inc.
1790 E. Airport Blvd.
Sanford, FL. 32773
From: [email protected]
Sent: Wednesday, October 05, 2005 12:52 PM
To: Technical Account
Subject: Superchips.com Customer Inquiry
Wondering if you are considering development of a flashpak for the new Chrysler 6.1 hemi (300C SRT8)? There seems to be a lot of pent up demand from the roughly 5000 6.1L Hemi owners for a product like this.
Bob
We are watching the demographic of the car, try us back in a few months.
Technical Service
Ron Rapp
1-888-227-2447 ex. 7019
Superchips Inc.
1790 E. Airport Blvd.
Sanford, FL. 32773
From: [email protected]
Sent: Wednesday, October 05, 2005 12:52 PM
To: Technical Account
Subject: Superchips.com Customer Inquiry
Wondering if you are considering development of a flashpak for the new Chrysler 6.1 hemi (300C SRT8)? There seems to be a lot of pent up demand from the roughly 5000 6.1L Hemi owners for a product like this.
Bob
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1,364 Posts
Dood,
I contacted them directly by phone for the same thing. We got the Superchips flashpaq for out hemi truck and I was amazed at the results. I called them and they told me to check back in a few months. They say the same about the 5.7L Hemi LX platform vehicles as well. I'm not sure how similar the computers are for the 5.7L Hemi and 6.1L Hemi LX platform cars, but I would think there is a great deal of similarities. That would allow them to tap a very fast growing segment of DCX owners. I know a lot of first time Dodge or Chrysler owners out there in a LX Platform vehicle.
Todd
I contacted them directly by phone for the same thing. We got the Superchips flashpaq for out hemi truck and I was amazed at the results. I called them and they told me to check back in a few months. They say the same about the 5.7L Hemi LX platform vehicles as well. I'm not sure how similar the computers are for the 5.7L Hemi and 6.1L Hemi LX platform cars, but I would think there is a great deal of similarities. That would allow them to tap a very fast growing segment of DCX owners. I know a lot of first time Dodge or Chrysler owners out there in a LX Platform vehicle.
Todd
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