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02-07-2015, 06:56 PM
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#1
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2 Rivet Member
2014 27' FB International
Avila Beach
, California
Join Date: Nov 2014
Posts: 63
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Rear axle gear ratio question, no, it is not what you think!
Gang,
We are in the process of purchasing a used- obviously- 2012 Ram 2500 diesel.
The outfit does not have the original build sheet and the dealer seems incapable of finding out what the differential gear ratio is.
Mind you, this thing, even with 3:49 (or whatever) is fully capable of pulling our 2014 27ft International, however, for you experts out there, those more mechanically inclined than I, is there any way to determine what the rear end gear ratio is? Is it somehow reflected in VIN or???
Thanks.
Logrider
__________________
Logrider
"don't let life get in the way of living"
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02-07-2015, 07:10 PM
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#2
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Rivet Master
Currently Looking...
Mantua
, Ohio
Join Date: Jul 2005
Posts: 7,062
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The parts or service dept should be able to run a build sheet. Any Dodge dealer can do it. All you need is the vin. Jim
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02-07-2015, 07:15 PM
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#3
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Rivet Master
2006 25' Safari FB SE
Broadway
, North Carolina
Join Date: Mar 2007
Posts: 838
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Quote:
Originally Posted by LOGRIDER
is there any way to determine what the rear end gear ratio is? Is it somehow reflected in VIN or???
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Dealer can get the build sheet. You can contact Dodge if you have the VIN.
__________________
2006 Safari SE FB
2000 F150 4.2L (retired), 2011 F250 6.2L, 2010 ML550, 2000 Excursion 7.3L
Broadway, NC
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02-07-2015, 07:15 PM
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#4
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Rivet Master
1994 34' Excella
Warren
, Manitoba
Join Date: Apr 2006
Posts: 1,253
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If the Dodge dealer you are dealing with can't run the build sheet, it's time to "run" from that dealer. Basic ratio is 3.42 but it could be lower. You will have enough power to pull your trailer in any case.
__________________
ACI #7394
2012 GMC 2500 HD Duramax Denali
1994 Excella 34'
1987 Limited 34', 1976 31', 1976 Argosy 22' Gone to new homes
Hensley Hitch
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02-07-2015, 07:27 PM
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#5
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Full Time Adventurer
2007 27' International CCD FB
Nomadic
, USA
Join Date: Jul 2013
Posts: 2,748
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Guys, there is a better way. Go here: Ram Trucks - Recall
Click the link on the left hand side of the page that says EQUIPMENT LISTING
Enter your VIN and you will get a build sheet in PDF format.
We bought used, and this is how we verified our truck was 3.92 and had 32 gallon tank.
__________________
Family of 5 exploring the USA with a Ram Power Wagon & Airstream in tow.
OUR BLOG | INSTAGRAM
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02-07-2015, 09:34 PM
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#6
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Rivet Master
1998 30' Excella 1000
Livingston
, Texas
Join Date: Jan 2014
Posts: 546
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I just crawled under my 2015 Ram. The axle ratio was printed on a label on the bottom of the axle.
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02-07-2015, 09:39 PM
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#7
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,577
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There is a tag on the rear housing cover with the gear ratio and some other numbers, most likely 3.73 , good ratio ,I would like to try a 3.54. Either one is good...
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02-08-2015, 03:21 AM
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#8
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Full Time Adventurer
2007 27' International CCD FB
Nomadic
, USA
Join Date: Jul 2013
Posts: 2,748
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Depending on configuration it can only be one of 3 options. 3.42 - 3.73 or 4.10
http://www.ramtrucks.com/shared/pdf/..._Tow_Chart.pdf
I'd pass on 3.42 and aim for 3.73 or 4.10 depending on how you'll tow.
When it came to the half tons, the majority we looked at had the lower 3.21 gearing and some where 3.55. Took lots of looking to find one with 3.92 and the larger fuel tank. But we got it done using the vin reference I posted above.
The gearing is based on the transmission in the truck. Also, as stated it is usually stamped on the axle, but not all. Mine doesn't have it stamped on ours for axle. You win some, you loose some. But the Vin thing is always 100%.
__________________
Family of 5 exploring the USA with a Ram Power Wagon & Airstream in tow.
OUR BLOG | INSTAGRAM
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02-08-2015, 06:41 AM
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#9
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,577
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Hey there logrider, don't get dirty while under the pickup looking at the tag on the axle housing which is on one of the bolts of the rear cover, we will be in oceanio about the first of April, to see my old friend Mr Beck, will try to remember to get in touch,you will like the dodge...,
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02-08-2015, 07:05 AM
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#10
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2 Rivet Member
2014 27' FB International
Avila Beach
, California
Join Date: Nov 2014
Posts: 63
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Quote:
Originally Posted by CBWELL
If the Dodge dealer you are dealing with can't run the build sheet, it's time to "run" from that dealer. Basic ratio is 3.42 but it could be lower. You will have enough power to pull your trailer in any case.
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In the dealer's defense, they are not an actual Dodge dealership but rather a independent. Nevertheless thanks to the suggested web site proffered by Bold Adventure, with the VIN, now I know everything there is to know about the oufit..I love this forum...a lot of knowledge out there, if you just know who to ask.
__________________
Logrider
"don't let life get in the way of living"
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02-08-2015, 07:22 AM
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#11
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1987 Avion 34W owner
Vintage Kin Owner
Good Ol'
, USA
Join Date: Mar 2014
Posts: 2,090
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My Ford has an axle-type indicator on the sticker that is on the driver's door frame. Maybe yours has the same?
__________________
I this great country!!!!
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
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02-08-2015, 11:53 AM
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#12
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Rivet Master
1976 31' Sovereign
Oswego
, Illinois
Join Date: Jan 2007
Posts: 2,017
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The higher number more pulling power less economy lower top speed unless 3.71 4.10 etc. as dif. manf. have dif. ratios. High #s. for small horse power engine, unless you are going to move a house then you would need higher #s. I have been pulling all kinds of trailers & wghts. for well over 60 yrs. never had to specify high # rear axle, always had high horse power engines.
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02-08-2015, 02:40 PM
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#13
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2 Rivet Member
2015 25' Flying Cloud
Apollo Beach
, Florida
Join Date: Jan 2015
Posts: 30
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On subject with this post but TV is a F150 4x4 super cab Ecoboost, will be picking up our new 25' FC on Tuesday and asking the same question. What is your average electric bake controller setting or is it about the same 5 to 6 as most of the post suggest for the F250 and larger.
Thanks
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02-08-2015, 02:41 PM
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#14
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2 Rivet Member
2015 25' Flying Cloud
Apollo Beach
, Florida
Join Date: Jan 2015
Posts: 30
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Sorry fellas ask my question on the wrong post site.
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