66rfe transmission in 16 2500 is driving me nuts!

[tnt2671]

Would a line pressure booster help? As I understand them, they would raise the line pressure so that the transmission will hold the gears longer and shift slightly more aggressively without having to reprogram anything. This is the one I've found, Line Pressure Booster Kit - RFE-LB1 - Sonnax I haven't found any info from someone who has actually installed one in a 66RFE though.

hmm that is a good question , would the adaptive system just work against this and try to maintain factory pressures? would it start throwing error codes due to pressures being out of factory operating range? i have a feeling it would not hold gears longer though more than likely just firm up the shifts ( kind of like an old traditional shift kit , pre electronic controlled days) good find though . i also couldn't find any results of real world install in a 66

 

[OnSale]

Hey guys I have a similar problem and it's driving me nuts. Someone please help me!!!

I have a 2012 ram 1500 st regular cab 5.7L/3.55's. I bought it used about 25 days ago with only 32k miles on it. I can't stand the shifting in my truck. If I baby the throttle and just drive normally the truck constantly sounds like it's "choking" and struggling to breathe or move until i push the peddle harder and it downshifts. I have a Flowmaster Exhaust and k&n 63 Series Intake so with the intake on there when I'm doing 35-45 at low rpms and I just barely push the peddle I can really hear the intake "throbbing" or it sounds like it's "choking". The exhaust makes a repetitive "duh duh duh duh" droning noise like it's misfiring but the motor is fine. If I drive "semi hard" on the gas this doesn't happen. It's only when I drive soft and I'm cruising at a steady speed and I slowly push the gas peddle.

This only happens when I have the truck in "auto mode" or D. When I put it into "manual shift" and just leave it in 6th while i drive around, it seems to take away the problem for the most part. I also noticed that it's really noticeable when the truck says ECO on the guages.

I'm about to bring the truck into the dealer for a warranty claim because something just isn't right. This can't be normal. I don't wanna have to bring it in for warranty claim because I have custom headlights with resistors tapped into them and Halos and led bulbs and I don't want the dealer to see all of this and either note that I have them or say something about them and then in the future or down the road I have an electrical issue with the headlights and they try to claim it's because I once had these headlights in my truck. It would be a major pain to remove the lights just to bring it in to get looked at so if I can avoid having to go to the dealer that would be best. The reason I say this about the headlights and warranty is because I just had an 06 Ram and my TIPM had 9 internal failures for headlights and taillights and the dealer tried to claim that my aftermarket Spyder headlights and taillights caused the issue with the TIPM failures.

Anyways... does anyone know what I can do or anything that can be done to fix this issue? It's so over the top rediculous and obvious that I don't even enjoy driving my truck anymore because I get so annoyed and frustrated when this happens.

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Can anyone chime in on my issues and help??

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[12sportmc]

Can anyone chime in on my issues and help??

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MDS brother. It's normal. You just notice it more with the exhaust on there


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[Ratket]

^ What he said - that flow master just makes the drone more noticeable.. I wonder if they took the resonators off or not .. With as bad as you make it sound in gonna assume they did.

 

[OnSale]

MDS brother. It's normal. You just notice it more with the exhaust on there


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Ok. I thought it was the MDS but nice wasn't sure. It's really annoying and the choking / pulsating thing is beyond annoying. I guess there's nothing I can do to turn off the MDS except buy a Bully Dog tuner.

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[Hiaber]

Oh goody, a topic I can chime in on.... Full disclosure, I haven't read the whole thread yet but wanted to relate to you all. What I've gone through with my 3500 with a 6.4 hemi and the 66rfe trans.

The problem I deal with, to this day, is a slip/shudder when the truck is in 3rd, for example coasting towards a traffic light that is about to change, light changes and I apply steady, semi aggressive pressure to the pedal, the whole truck shakes for 2-3 seconds, sometimes longer, until it finally grabs into 2nd. If I mash the pedal it kicks down normally.... Now... Here's the list of what fca Canada has done to the truck at the dealership. Keep in mind, the truck is now out of warranty and up to me to figure out, and yes, it still has the problem.

-Flashed with new software
-flashed with new software
-took it apart and found burnt clutch pack and replaced.
-another flash
-new valve body
-new tcm/ecm
-another flash
-another valve body
-A WHOLE NEW TRANSMISSION AND TORQUE CONVERTER
-another flash
-a new updated valve body
-another flash

At this point I was told that it was a shift point issue and the so called engineers would have to write new shift points which they didn't, wouldn't and haven't.

Took to a diff dealer just before the warranty expired and got another torque converter, still didn't fix it.

I estimate they spent near 40-45k cdn $ attempting to repair the trans and the noisy engine complaints I had (fixed the noisy engine prob with help from Brian at bndautomotive.com, but that's a story for a different thread)

I am going to be getting a diablo tuner very soon and will be trying a shift kit etc to try and solve this problem as I like through truck and would love to solve the issue. Will try and keep you all posted as to my success or lack there of.

 

[Phil21502]

Is anyone who has this shutter still on stock tires? I don't remember mine doing it with stock tires.

 

[Hiaber]

Is anyone who has this shutter still on stock tires? I don't remember mine doing it with stock tires.

The dealership tried putting stock tires on my truck to rule it out as a possibility, it did shift a little differently, but still did the shudder

 

[Ratket]

Oh goody, a topic I can chime in on.... Full disclosure, I haven't read the whole thread yet but wanted to relate to you all. What I've gone through with my 3500 with a 6.4 hemi and the 66rfe trans.

The problem I deal with, to this day, is a slip/shudder when the truck is in 3rd,f9r example coasting towards a traffic light that is about to change, light changes and I apply steady, semi aggressive pressure to the pedal, the whole truck shakes for 2-3 seconds, sometimes longer, until it finally grabs into 2nd. If I mash the pedal it kicks down normally.... Now... Here's the list of what fca Canada has done to the truck at the dealership. Keep in mind, the truck is now out of warranty and up to me to figure out, and yes, it still has the problem.

-Flashed with new software
-flashed with new software
-took it apart and found burnt clutch pack and replaced.
-another flash
-new valve body
-new tcm/ecm
-another flash
-another valve body
-A WHOLE NEW TRANSMISSION AND TOURETTE CONVERTER
-another flash
-a new updated valve body
-another flash

At this point I was told that it was a shift point issue and the so called engineers would have to write new shift points which they didn't, wouldn't and haven't.

Took to a diff dealer just before the warranty expired and got another torque converter, still didn't fix it.

I estimate they spent near 40-45k cdn $ attempting to repair the trans and the noisy engine complaints I had (fixed the noisy engine prob with help from Brian at bndautomotive.com, but that's a story for a different thread)

I am going to be getting a diablo tuner very soon and will be trying a shift kit etc to try and solve this problem as I like through truck and would love to solve the issue. Will try and keep you all posted as to my success or lack there of.

What are you running from BND Automotive? I have been tempted to try Brian’s stuff. Also a lot of guys say the pedal commander helps 10 fold with these issues as it adjust the sensitivity of the throttle.

 

[RLJ10X]

That sucks, TNT. But I know exactly what you mean. My truck did that when new. Moan, and lug is what I called it. I used to spend a lot of time with my hand on the Slap Stick.

I put 4.10s and a Hemi Fever tune in my truck, and I am real happy with the way it shifts now.

The guys with the 8 speed think it's the greatest thing ever, but there is nothing wrong with a well set up 5/6.

 

[sandawilliams]

The pedal commander might help that. My truck would lug around including when pulling in tow/haul. Since installing the PC it now shifts more aggressively and holds gears better.

 

[Hiaber]

What are you running from BND Automotive? I have been tempted to try Brian’s stuff. Also a lot of guys say the pedal commander helps 10 fold with these issues as it adjust the sensitivity of the throttle.

I'm running his oil, filter and fuel additive, my 6.4 went from banging like a diesel to being almost new sounding, I plan to put more info in one of the 6.4 complaint threads when I have a chance. I'm also running his trans fluid with some special friction modifiers, but that didn't solve the problems on that end, but I sure do feel better running his stuff, doing my diffs and transfer case in the spring with it

 

[theviking]

="I am going to be getting a diablo tuner very soon and will be trying a shift kit etc to try and solve this problem as I like through truck and would love to solve the issue. Will try and keep you all posted as to my success or lack there of.

Diablo tuner/custom tune isn't necessarily going to solve the problem either. I have a Hemifever tune as well as an aftermarket converter and still have this issue. I suspect it's something in the trans programming that no one can/has addressed yet.

 

[JRG18]

Idk if I've just changed my habits to deal with it or it has actually got better but I remember thinking it always wanted to be in the highest gear possible. I'd be in 5th going 35. Would go to 6th at 47mph and wouldn't shift out until I got down to 42 unless I put my foot in it. I don't notice it much anymore, unless I'm in an active regen, but you don't get those. I know it's different tranny's but it sounds like the same crappy programming was installed.

 

[zeddy]

What this guy says. These transmissions are clunky until you get 5K-10K miles of adaptive learning on them before the shifting smooths out. I had close to 8K miles before mine smoothed out and now runs and shifts great with no clunking.

My 2015 was real clunky. Once I got to 10k it was nice and smooth. My 2017 with 6k miles still clunky, getting better but clunky. Only thing I hate about the truck. It's our everyday daily grocery getter. Want to put miles on the dam thing .

 

[Soldier of The Law]

I️ have a PC .... still have the shudder as described but it’s not as bad as Pre-Pc .... I️ had the issue on stockers, 35’s and 37’s.

 

[Deki]

What gears is this clunking experienced in? I have 1100 miles on my truck and I have not noticed anything out of the ordinary.

 

[warwickram]

did you have the tranny solenoid recall done

 

[Garry71]

If I'm doing a lot of stop and go driving I switch to the tow/haul mode, seems to work pretty good for me.

 

[Blue Streak]

My Power Wagon w/6.4l & 4.10 gears with the same trans, shifts perfectly. I think the problem lies in the too small 5.7l & too high 3.42 gears.