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  #11  
Old 12-12-2011, 07:28 PM
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Quote:
Originally Posted by doug713 View Post
Here is a quote from another member (thanks transengineer) of the TSB regarding the shift issues. It seemed to help mine out for the most part. I don't think we'll ever get rid of the mds shudder 100%.

Looks like TSB 18-023-11 is a PCM reflash to correct a number of different issues. Here are the details:

SUBJECT: Flash: MIL Illumination And Driveability And Transmission Shifting Improvements

OVERVIEW: This bulletin involves flash reprogramming the Powertrain Control Module (PCM) with new software.

MODELS: 2011RAM1500 (DS), 2500 (DJ), 3500 CAB Chassis (DD), and Dakota (ND)

Service Bulletin applies to vehicles equipped with a 3.7L, 4.7L or 5.7L engine, a 545RFE or 42RLE transmission, and built before February 1, 2011 (MDH 0201XX).

SYMPTOM/CONDITION: Some customers may notice any of the following:

MIL Illumination
Technician may find that the following Diagnostic Trouble Codes (DTC) have been set:
a. P2096 - Downstream Fuel Trim System 1 Lean (5.7L engine).
b. P2097 - Downstream Fuel Trim System 1 Rich (5.7L engine)
c. P2098 - Downstream Fuel Trim System 2 Lean (5.7L engine)
d. P2099 - Downstream Fuel Trim System 2 Rich (5.7L engine)

Driveability Improvements:
a. Engine seems to lacks power at high RPM (5.7L and 4.7L engine).
b. Shudder or shake condition on wide open throttle stab during downshift event (5.7L and 4.7L engines).
c. EVAP Diagnostic Enhancements. This diagnostic routine will be disabled while the vehicle is in decel fuel shut off mode (3.7L/4.7L engines only).
d. Audible knock sound on WOT launchs (DJ/DD 5.7L engine only).

Transmission Improvements:
a. High engine RPM's needed before vehicle will upshift from 3rd to 4th (5.7L and 4.7L engines).
b. Harsh 1-2 upshift (5.7L and 4.7L engines).
c. Unexpected or busy downshift while coasting between 45-48 mph (DS 5.7L engine only)


Thanks a lot. Going to check on this tomorrow.
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  #12  
Old 12-12-2011, 07:34 PM
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Not a problem man, thats what all of us on here are here for.. Keep us posted on the results. Have a good one..
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Old 12-14-2011, 03:55 PM
MexicaN MexicaN is offline
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Hi everyone, has anyone else gotten worse gas mileage since this transmission update? I had my this update done a few months ago and I was getting 18-19 MPG average, after the update I'm getting at best 14MPG and my average says 13.2 right now. I've tried driving it like a grandma and setting the cruise at 70 on the highway, but still the best I ever got was 14.4. I know this isn't right and don't know what to do because the dealer said they can't change it back now. Is that true? Is anyone else having the same issue?
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Old 12-14-2011, 08:36 PM
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Yeah, and I think its this "winter" crap gas that is causing the bad mileage. That's the only thing that makes sense to me as my mileage has dropped 3-4 mpg in the past couple weeks. I will try harder to find a station that carries only ethynol free gas and hope that helps.. let me know if you try the same and it gets better..
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Old 12-19-2011, 05:21 PM
MexicaN MexicaN is offline
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I just filled up today at a Sunoco that doesn't have any ethanol in their gas. It is near a marina so they have pure gasoline for the boat engines...I'll let you know the results probably next week
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  #16  
Old 12-21-2011, 09:18 PM
RayN.TX RayN.TX is offline
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how can I tell if my mds is even kicken in? I feel nothing and hear nothing. I dont know weither to be thankful or concerened? is their a certain speed at which it engauges? (2011 cc sport 4x4) thanks
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