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 - General Discussion > 2013 Dodge Ram Forum


Notices

2013 Dodge Ram Forum For specific discussion of the 2013 Dodge Ram!


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

Reply
 
Thread Tools
  #1  
Old 08-16-2013, 01:26 AM
dodgehemi0 dodgehemi0 is offline
Dodge Ram Forum Member
 
Join Date: Aug 2013
Location: Clarksville
Age: 34
Posts: 71
Gender: Male
Vehicle: 2013 Sport Crew
Rep Power: 0
Rep:26
dodgehemi0 is on a distinguished road
Default 8 speed trans tow ratings?

Why are the tow ratings the same as the 6 speed trans? My 3.55 gears can only tow 8500lbs. My Titan with 3.31 and a 5 speed could tow 9800lbs. What's the deal guys anyone have an idea?
Reply With Quote
Sponsored links
  #2  
Old 08-16-2013, 06:37 AM
maw76's Avatar
maw76 maw76 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jul 2013
Location: Montreal Canada
Age: 38
Posts: 134
Gender: Male
Vehicle: 2013 RAM 1500 QC
Trim Level: Outdoorsman
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:49
maw76 is on a distinguished road
Default

Most likely so they don't have to worry about replacing the transmission. No doubt that the power train can take it might also be for acceleration from a safety point of view.
Reply With Quote
  #3  
Old 08-16-2013, 09:17 AM
Parkersdad Parkersdad is offline
Dodge Ram Forum Senior Member!
 
Join Date: Dec 2011
Location: Mooresville NC
Posts: 162
Gender: Male
Vehicle: 2013 Dodge Ram 2500
Trim Level: ST
Color: Mineral
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:21
Parkersdad is on a distinguished road
Default

If they ever start using this mandatory testing system all of the trucks tow ratings will go down.
Reply With Quote
  #4  
Old 08-16-2013, 09:28 AM
dodgehemi0 dodgehemi0 is offline
Dodge Ram Forum Member
 
Join Date: Aug 2013
Location: Clarksville
Age: 34
Posts: 71
Gender: Male
Vehicle: 2013 Sport Crew
Rep Power: 0
Rep:26
dodgehemi0 is on a distinguished road
Default

So why did the tow rating of the v6 8 speed combo go up for the 845rfe trans apposed to the ZF trans and v6 combo tow rating?
Reply With Quote
  #5  
Old 08-16-2013, 09:43 AM
spp spp is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jul 2013
Location: Michigan
Age: 36
Posts: 2,372
Gender: Male
Vehicle: 2008 Jeep Wrangler
Trim Level: Sahara
Color: Steel Blue
Rep Power: 3
Rep:106
spp will become famous soon enoughspp will become famous soon enough
Default

Parking prawl was strengthened in the 8 speed for 2014 (Source). That accounts for the 8 speed/V6 getting a better tow rating in 2014.
Reply With Quote
  #6  
Old 08-18-2013, 11:02 PM
Ramzaq Ramzaq is offline
Dodge Ram Forum Senior Member!
 
Join Date: Aug 2010
Location: Northern California
Posts: 585
Gender: Male
Vehicle: 2009 Ram CC 4X4
Trim Level: SLT, Big Horn
Color: Black Pearl coat
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 5
Rep:233
Ramzaq has a spectacular aura aboutRamzaq has a spectacular aura aboutRamzaq has a spectacular aura about
Default

The final gear ratio in the 5, 6, and 8 speed trans are all the same, no difference. So that is why they have the same tow ratings. The rear end ratio determines how much it will tow in this situation. This is the recommended limit Chrysler has decided on, most likely to keep problems with warranty costs and liability down.

The 8 speed has a maximum tq rating of around 520 ft lbs torque and the 5 and 6 speed have a maximum of around 420 lbs. Can't remember the exact maximums but they should be close as far as I remember.
Reply With Quote
  #7  
Old 08-19-2013, 02:21 PM
Thunderhorse's Avatar
Thunderhorse Thunderhorse is offline
The Sound of Eight Hooves

 
Join Date: Jun 2013
Location: Jacksonville, NC
Age: 23
Posts: 2,949
Gender: Male
Vehicle: 2013 Ram1500 4x4 8HP70 3.21LSD
Trim Level: Lone Star Quad Cab
Color: Bright White
Engine: 2013-20?? 345ci (5.7L) Hemi V8 395hp 410lb/ft
Rep Power: 4
Rep:519
Thunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of light
Default

The benefit you get from the 8 speed over the old 6 speed comes from it being a lighter transmission.
__________________
Huskyliner Weatherbeaters, door edge guards, Line-X bedliner, Kryptek Typhon Cordura seat covers w/ MOLLE panels (review), Console Vault (install/review), Bilstein 4600s (thread).
Reply With Quote
  #8  
Old 08-19-2013, 06:18 PM
phobos512's Avatar
phobos512 phobos512 is offline
Dodge Ram Forum Member
 
Join Date: Jun 2013
Location: Lexington Park, MD, USA
Age: 34
Posts: 113
Gender: Male
Vehicle: 2013 Ram 2500 4x4 CCSB CTD
Trim Level: Laramie
Color: Maximum Steel
Engine: 2011-20?? 409ci (6.7L) Cummins Turbo Diesel 350hp 800lb/ft
Rep Power: 0
Rep:6
phobos512 is an unknown quantity at this point
Default

Quote:
Originally Posted by Thunderhorse View Post
The benefit you get from the 8 speed over the old 6 speed comes from it being a lighter transmission.
Um, the main benefit you get from an 8-speed is that the gear ratios are more closely spaced which allows the engine to stay in its powerband. It being lighter is not the primary reason. All things being equal (i.e. manufacturing techniques and materials) a transmission with more gears ought to be heavier. Obviously not the case here but the 8-speed being lighter is not the main reason you'd want it...
__________________
Matt || 2013 2500 Laramie || CCSB 4x4 CTD || Maximum Steel || Nitto Terra Grapplers 305/70-17s
Reply With Quote
  #9  
Old 08-19-2013, 06:20 PM
phobos512's Avatar
phobos512 phobos512 is offline
Dodge Ram Forum Member
 
Join Date: Jun 2013
Location: Lexington Park, MD, USA
Age: 34
Posts: 113
Gender: Male
Vehicle: 2013 Ram 2500 4x4 CCSB CTD
Trim Level: Laramie
Color: Maximum Steel
Engine: 2011-20?? 409ci (6.7L) Cummins Turbo Diesel 350hp 800lb/ft
Rep Power: 0
Rep:6
phobos512 is an unknown quantity at this point
Default

Quote:
Originally Posted by Parkersdad View Post
If they ever start using this mandatory testing system all of the trucks tow ratings will go down.
Erm...it's not mandatory - that's why only Toyota uses it thus far. It's a suggested methodology for standardizing tow ratings across multiple manufacturers. Which is why it'll more than likely never be "mandatory" unless the government forces it to be so via fraud accusations, accident investigations for vehicles that show they were misrated, or some such.
__________________
Matt || 2013 2500 Laramie || CCSB 4x4 CTD || Maximum Steel || Nitto Terra Grapplers 305/70-17s
Reply With Quote
  #10  
Old 08-19-2013, 06:34 PM
Thunderhorse's Avatar
Thunderhorse Thunderhorse is offline
The Sound of Eight Hooves

 
Join Date: Jun 2013
Location: Jacksonville, NC
Age: 23
Posts: 2,949
Gender: Male
Vehicle: 2013 Ram1500 4x4 8HP70 3.21LSD
Trim Level: Lone Star Quad Cab
Color: Bright White
Engine: 2013-20?? 345ci (5.7L) Hemi V8 395hp 410lb/ft
Rep Power: 4
Rep:519
Thunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of lightThunderhorse is a glorious beacon of light
Default

Quote:
Originally Posted by phobos512 View Post
Um, the main benefit you get from an 8-speed is that the gear ratios are more closely spaced which allows the engine to stay in its powerband. It being lighter is not the primary reason. All things being equal (i.e. manufacturing techniques and materials) a transmission with more gears ought to be heavier. Obviously not the case here but the 8-speed being lighter is not the main reason you'd want it...
Maybe I should be more clear: the reason the tow ratings improved slightly between 2012 and 2013 is because the 8 speed is lighter than the old 6 speed. All things are not equal and how much the 6 speed should weigh are irrelevant because they are not similar in manufacturing techniques or materials. the 8 speed is lighter, the 6 speed is heavier, that's all that matters. The fact that you have more favorable ratios with the 8 speed had no impact on tow ratings for the 8 speed in 2013.

The final drive ratios are 0.67 for both transmissions in their highest respective gears. The transmission is not the limiting factor behind the tow ratings, the differential is. Yes you have a much lower first gear with the 8 speed (actually the first 2 gears), but the differential is under the same amount of stress it would be if the truck had the 6 speed because the speed of the output shaft and therefore input pinion will be the same at the same speeds. The only difference is that the transmission will be in a different gear.

I love my 8 speed, the added gears have improved power availability substantially but do not allow it to tow more than it could if it had the 6 speed, the weight savings does. There are other threads on this topic as well.
__________________
Huskyliner Weatherbeaters, door edge guards, Line-X bedliner, Kryptek Typhon Cordura seat covers w/ MOLLE panels (review), Console Vault (install/review), Bilstein 4600s (thread).
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 11:33 PM.


= 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