DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Help Zone - Dodge Ram Problems, Complaints, & Solutions - Maintenance & Re > 4TH Generation Dodge Ram 2009+ Dodge Ram Trucks > Powertrain > 5.7L (345 cu in) HEMI V8 Specific Topics


Notices


Latest Vendor News
AutoAnything
Addictive Desert Designs!
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 12-30-2013, 10:26 PM
dano31 dano31 is offline
Dodge Ram Forum Newcomer
 
Join Date: Aug 2012
Location: fort mcmurray
Age: 32
Posts: 1
Gender: Male
Vehicle: 2012 dodge ram
Color: red
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
dano31 is on a distinguished road
Default Cold Weather shifting issues

To start off I have a 2012 ram 1500, truck runs fine when its warm out and a bit chilly out but when it gets to be around -30 to -50 the truck does not shift properly. It will shift eventually but driving around town doing 60km/h my truck is reving at around 2300 rpm. It's starting to get hard on gas lol I read the other topic of buddies truck stuck in 4th, mine has no burning smell and it only does it when its cold so I'm lost. Would the tranny fluid be that thick that its causing shifting issues? Please help me
Reply With Quote
Sponsored links
  #2  
Old 12-30-2013, 11:24 PM
smurfs's Avatar
smurfs smurfs is offline
Dodge Ram Forum Member
 
Join Date: Nov 2013
Location: Swift Current, Saskatchewan
Age: 37
Posts: 71
Gender: Male
Vehicle: 2013 Ram 1500
Trim Level: Laramie
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:105
smurfs will become famous soon enoughsmurfs will become famous soon enough
Default Cold Weather shifting issues

theres a similar thread about this. it's the programming. I believe something to do with the fluid being so thick at that temp, it bungs things up and burns up torque convertors.

Edit: here's a quote from it:

"Starting in 2010 MY, we made a change to the transmission control logic / calibration, that delays the 2-3 upshift whenever ambient temp (not sump temp) is below -15°F (below -26°C).

The reason is to prevent torque converter failures (due to overheating) in the event that the trans oil cooler becomes "frozen" at low temps. Transmission fluid can become very thick at low temps, effectively blocking flow through the cooler. This then can lead to the converter overheating (due to lack of cooler flow). When we hold 2nd gear longer (by delaying the 2-3 upshift), it reduces the amount of slippage (and therefore, heat generation) in the converter, thereby avoiding the converter overheat.

In these trucks, the trans oil cooler is oil-to-air (it's not inside the radiator bottom tank), so as long as the ambient temp stays low, the cooler flow may remain restricted. That's why the 2-3 upshift delay is tied to the ambient temp, rather than the trans sump temp or engine coolant temp."

Last edited by smurfs; 12-30-2013 at 11:28 PM.
Reply With Quote
  #3  
Old 01-09-2014, 12:17 PM
boomer boomer is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jul 2012
Location: North Eastern Minnesota
Age: 29
Posts: 141
Gender: Male
Vehicle: 2007 Ram 1500 quadcab 4x4
Trim Level: bighorn
Color: white
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:20
boomer is on a distinguished road
Default

Good info smurfs, I am noticing the same thing in mine, wants to run higher rpms in town then normal in the cold, I was hoping it was a way to protect itself, and from what you said it seems like thats exactly what its doing. Thanks
Reply With Quote
  #4  
Old 01-09-2014, 07:02 PM
Red-Stripe Red-Stripe is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jul 2012
Age: 52
Posts: 342
Gender: Male
Vehicle: 2012 ram
Rep Power: 3
Rep:106
Red-Stripe will become famous soon enoughRed-Stripe will become famous soon enough
Default

The sad reality is that it's your $$ at the gas pump compensating for their engineering failure. They hope enough people don't notice it and think about it.
Reply With Quote
  #5  
Old 01-09-2014, 07:08 PM
rvj rvj is offline
Dodge Ram Forum Member
 
Join Date: Nov 2013
Location: S.E. Nebraska
Age: 59
Posts: 56
Gender: Male
Vehicle: 2014 Ram Big Horn
Trim Level: SLT Big Horn
Color: White
Engine: 2013-20?? 345ci (5.7L) Hemi V8 395hp 410lb/ft
Rep Power: 0
Rep:10
rvj is on a distinguished road
Default

My 14 won't go into 6th till the engine warms up, then it does just fine.
Reply With Quote
  #6  
Old 01-09-2014, 09:35 PM
Hornet Hornet is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2013
Location: Airdrie AB
Age: 53
Posts: 1,004
Gender: Male
Vehicle: 2013 RCSB Ram
Trim Level: ST
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 1
Rep:460
Hornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of lightHornet is a glorious beacon of light
Default

Here's the link to the whole thread Smurf's talking.
According to TransEngineer they're working on a fix for their mistake before it kills somebody.

Read the whole thread,it's eye opening

http://www.ramforumz.com/showthread.php?t=160191
Reply With Quote
  #7  
Old 01-21-2014, 12:22 PM
Bighorn5.7 Bighorn5.7 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Oct 2010
Location: Elk River Minnesota
Age: 33
Posts: 97
Gender: Male
Vehicle: 2014 ram 1500
Trim Level: Express Blackout
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
Bighorn5.7 is on a distinguished road
Default

I had an 07 and was a little more slow to shift in the below zero temps. I now have a 14 with 175 miles on it and it does exactly what you are stating as it was -20 this morning. After reading this its what I figured and the computer is using ambient to decide how it operates. It does suck that its so lazy to shift and when it does its pretty firm. Feels like the father in laws old 95 Gmc sloppy 4 speed!
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Advertisement






All times are GMT -4. The time now is 08:22 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum