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 > Dodge Ram MPG Zone


Notices

Dodge Ram MPG Zone Discuss your MPG woes and helpful hints here!


Latest Vendor News
AutoAnything
Addictive Desert Designs!
United Radio
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 02-03-2013, 06:40 PM
xmanofsteel xmanofsteel is offline
Dodge Ram Forum Member
 
Join Date: Jan 2013
Posts: 73
Gender: Male
Vehicle: Looking at 2013 Ram 1500
Rep Power: 0
Rep:10
xmanofsteel is on a distinguished road
Default 3.21 vs. 3.55 in the 8 speed MPG?

Was curious to get some real world MPG's. The local dealership doesn't have any 8 speeds in yet, and probably won't for quite a while. So I was hoping to hear what others are getting with these 2 speeds and try to figure out which would best suit me.

I drive 10%/90% city/highway with some large hills on my commute. I will be using it as a daily drive and won't really tow often enough to worry about it. Some people are saying that you won't notice a difference in MPG between the 3.55 and 3.21 in the 8 speed, but can't give any numbers...curious to see these.

Thanks!
Reply With Quote
Sponsored links
  #2  
Old 02-03-2013, 06:59 PM
GTyankee's Avatar
GTyankee GTyankee is offline
Dodge Ram Forum Member

 
Join Date: Dec 2009
Location: San Diego East County, Ca
Posts: 19,026
Gender: Male
Vehicle: 2009 Dodge Ram 1500 2X4
Trim Level: quad cab SLT
Color: sunburst orange pearl
Rep Power: 20
Rep:2615
GTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond repute
Default

actually, there are no numbers available for the HEMI with the 8 speed yet
the website site reads NA

of course you will get the best mileage with the 3.21 but you won't have much for torque
with the 3.55 you will have enough torque to handle most situations, it won't shift down as much on the hills, when you have to load the bed or tow
If you live in Snow country, i would add the Limited Slip Differential
it is a available option with the 3.21, 3.55, & 3.92 rear axles
__________________
Ram 1500 SLT Quad cab, 5.7 HEMI(R) MDS VCT, 5 speed auto 545RFE, 3.55 differential gears, 18" Magnaflow muffler, EGR bug deflector, Bushwacker fender flares, customized Nfab nerf bars, CB radio, Autonet wi-fi router, custom soft tonneau cover, Line_X bedliner, DEBO Step, build date 10/15/08 a Wednesday built vehicle
Reply With Quote
  #3  
Old 02-04-2013, 12:26 AM
xmanofsteel xmanofsteel is offline
Dodge Ram Forum Member
 
Join Date: Jan 2013
Posts: 73
Gender: Male
Vehicle: Looking at 2013 Ram 1500
Rep Power: 0
Rep:10
xmanofsteel is on a distinguished road
Default

Quote:
Originally Posted by GTyankee View Post
actually, there are no numbers available for the HEMI with the 8 speed yet
the website site reads NA
I was actually thinking of the V6...where do you see the numbers?
Reply With Quote
  #4  
Old 02-13-2013, 10:55 PM
HoustonHemi's Avatar
HoustonHemi HoustonHemi is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jan 2010
Location: Texas!
Age: 49
Posts: 794
Gender: Male
Vehicle: 2014 Ram 1500 Quad
Trim Level: Lone Star
Color: Blue Streak Pearl
Engine: 2013-20?? 345ci (5.7L) Hemi V8 395hp 410lb/ft
Rep Power: 5
Rep:120
HoustonHemi will become famous soon enoughHoustonHemi will become famous soon enough
Default

Hard to find anyone with a PentaRam right now,,, (I know of only 1 here in the '3.6 engine' forum)
Reply With Quote
  #5  
Old 02-14-2013, 12:38 AM
snrusnak's Avatar
snrusnak snrusnak is online now
Dodge Ram Forum Senior Member!
 
Join Date: Jan 2011
Location: Orlando
Age: 27
Posts: 13,387
Gender: Male
Vehicle: 2010 Dodge Ram 1500
Trim Level: SLT
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 12
Rep:1385
snrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud ofsnrusnak has much to be proud of
Default

I find it funny how some people say you will have no torque with 3.21 an the 8 speed. They don't realize the 1st gear ratio of the 8 speed is 4.7:1 which is lower than the current 6 speed with 3.55's(first gear of 3:1). So the 8 speed with 3.21 out pulls the 6 speed with 3.55. STILL though, get the 3.55, as you will NOT get better mpg with the 3.21(unless you regularly cruise at or above 75mph. That is the only situation you will achieve higher mpg.
__________________
Sean

Breathing in and out is good enough for me.
Reply With Quote
  #6  
Old 03-11-2013, 12:32 PM
rrgmrg rrgmrg is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jan 2013
Location: So Cal
Posts: 166
Gender: Male
Vehicle: Shopping for a 2013 Ram 1500
Rep Power: 2
Rep:104
rrgmrg will become famous soon enoughrrgmrg will become famous soon enough
Default

Would the 3.92 provide better acceleration ? (V6, 8 speed, 4x4)
Reply With Quote
  #7  
Old 03-11-2013, 12:47 PM
lowfast lowfast is offline
Dodge Ram Forum Senior Member!
 
Join Date: Feb 2013
Location: Grapevine Texas
Posts: 550
Gender: Male
Vehicle: 2014 Ram 1500 CC 4x4
Trim Level: 1500 Longhorn 4x4
Color: Western Brown Monotone
Rep Power: 2
Rep:92
lowfast will become famous soon enough
Default

I would go 3.92 if you plan to go with a tire any larger than stock. With the deep first gear of the 8spd I would think the 3.55 would a good match for the stock tire diameter, especailly for someone who does 90% highway driving.
__________________
2014 Ram Longhorn CC 4x4 - Born 01/10/14, Western Brown, HEMI, 3.92, LS, AMP PowerSteps, Rancho RS9000 QuickLift and 275/65-20 DynaPro ATMs
2010 Lexus IS-F - Joe-Z Intake
1965 Ford Falcon Hardtop - ProTouring Monster in Progress, 4.6 V8, TCI Suspension, 18x8 & 18x11 Team III Wheels
Reply With Quote
  #8  
Old 03-11-2013, 12:50 PM
rango88's Avatar
rango88 rango88 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Feb 2013
Location: Ottawa, Ontario
Age: 26
Posts: 327
Gender: Male
Vehicle: 2011 Dodge Ram 1500
Trim Level: Big Horn
Color: White
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:18
rango88 is on a distinguished road
Default

I would not recommend the 3.21 with the V6 in a Ram. especially if its a Quad Cab or Crew Cab, its too heavy for the revs. My fiance has the 3.6L with the 3.21 gears in 5 spd auto in her 4,400 lb Wrangler and never revs high enough in town, its great on the highway though. So it depends, if you can test drive both gearings, go with the one you like though.
__________________
Andy ***Cannot see all Pics and Videos***
Reply With Quote
  #9  
Old 03-27-2013, 11:22 PM
becact's Avatar
becact becact is offline
Dodge Ram Forum Senior Member!
 
Join Date: Mar 2013
Location: Texas
Posts: 89
Gender: Male
Vehicle: 2013 Ram 1500
Trim Level: SLT V6 Big Horn
Color: True Blue
Engine: 2013-20?? 220ci (3.6L) Pentastar 305hp 269lb/ft
Rep Power: 0
Rep:26
becact is on a distinguished road
Default

Quote:
Originally Posted by rango88 View Post
I would not recommend the 3.21 with the V6 in a Ram. especially if its a Quad Cab or Crew Cab, its too heavy for the revs. My fiance has the 3.6L with the 3.21 gears in 5 spd auto in her 4,400 lb Wrangler and never revs high enough in town, its great on the highway though. So it depends, if you can test drive both gearings, go with the one you like though.
I respectfully disagree. The gearing range is so wide with the new 8 speed (I believe 1.5x the 6 speed), the final gear doesn't make near as much a difference as it did with the 6 speed. If you need power, push the gas, the trans will downshift, and you'll get your power. That's it's job. Final gear on the highway, however, will be lower with the 3.21, saving gas.

There's a hugggeee difference between a 5 speed in the wrangler and the 8 speed in the Ram.
Reply With Quote
  #10  
Old 03-28-2013, 01:00 AM
xmanofsteel xmanofsteel is offline
Dodge Ram Forum Member
 
Join Date: Jan 2013
Posts: 73
Gender: Male
Vehicle: Looking at 2013 Ram 1500
Rep Power: 0
Rep:10
xmanofsteel is on a distinguished road
Default

I ended up ordering one with the 3.55 gears after test driving one at a dealership (they didn't have one with 3.21 gears). We were getting 7.7L/100km on the highway and I was pretty impressed. Figured the 3.55 would "futureproof" the vehicle more than the 3.21's, as well.
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 11:16 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