Can't figure out what gear ratio I have - Dodge Diesel - Diesel Truck Resource Forums

3rd Gen Engine and Drivetrain -> 2007 and up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Can't figure out what gear ratio I have

Reply

 
 
 
Old 03-06-2008, 11:18 AM
  #1  
Registered User
Thread Starter
 
armourbl's Avatar
 
Join Date: Feb 2008
Posts: 159
Thanks: 0
Thanked 0 Times in 0 Posts
Can't figure out what gear ratio I have

Got a new 2007 a couple of weeks ago. It is a 2500 Mega Cab, 2WD, SLT, 6.7.

Looked everywhere and can't find any documentation that shows what gear ratio is in the differential. Looked in the door jams, glove box, dealer invoice, window sticker, on the differential for the metal tag, etc. Still no luck.

I can tell you that on the freeway cruising at 75 mph I'm still below 2,000 RPM on the tach.

Any ideas?

ben
armourbl is offline  
Reply With Quote
Old 03-06-2008, 11:37 AM
  #2  
Registered User
 
Chad04Ram's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
If you had the 410 option it would be stated on your window sticker as , I believe a 50$ option.The 07's only had two available ratios, the 410's and the 373's .The standard ratio is the 373's. I hope this helps.
Chad04Ram is offline  
Reply With Quote
Old 03-06-2008, 11:51 AM
  #3  
Registered User
 
Join Date: Jan 2008
Location: Minnesota
Posts: 283
Thanks: 0
Thanked 0 Times in 0 Posts
If your below 2000 RPM at 75 you probably have the 3.73 but I can't garantee it.
Tedonlin150 is offline  
Reply With Quote
Old 03-06-2008, 11:54 AM
  #4  
Registered User
 
Join Date: Jul 2007
Location: Redding, Ca
Posts: 367
Thanks: 0
Thanked 0 Times in 0 Posts
Well, from a dead stop, can you burn a little rubber or a lot ?
coolbreeze is offline  
Reply With Quote
Old 03-06-2008, 12:15 PM
  #5  
MMMmmmm.... Grits!!
 
ratlratl's Avatar
 
Join Date: Jul 2007
Location: HEART OF, NC
Posts: 1,031
Thanks: 0
Thanked 3 Times in 2 Posts
Shoot me the VIN by PM and I'll send you an options report.

Chris
ratlratl is offline  
Reply With Quote
Old 03-06-2008, 01:27 PM
  #6  
Banned
 
Hayseed's Avatar
 
Join Date: Aug 2005
Location: WV
Posts: 408
Thanks: 0
Thanked 0 Times in 0 Posts
Auto or manual?? If manual it has 3.42 if auto it has probably 3.73.
Hayseed is offline  
Reply With Quote
Old 03-06-2008, 06:12 PM
  #7  
Registered User
Thread Starter
 
armourbl's Avatar
 
Join Date: Feb 2008
Posts: 159
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by ratlratl View Post
Shoot me the VIN by PM and I'll send you an options report.

Chris
Very cool. I don't have the VIN on me, but I'll send it to you when I get home.

BTW, it burns rubber just fine, maybe too easily. LOL

ben
armourbl is offline  
Reply With Quote
Old 03-06-2008, 06:52 PM
  #8  
Registered User
 
GMScott's Avatar
 
Join Date: Dec 2002
Location: Pottstown, PA
Posts: 3,463
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by armourbl View Post
I can tell you that on the freeway cruising at 75 mph I'm still below 2,000 RPM on the tach.ben
An auto trans with 4:10's will still be just under 2k r.p.m.'s @ 75 m.p.h. like 1,950 or so. The 3:70 gears would be a lot lower r.p.m.'s I guess.
GMScott is offline  
Reply With Quote
Old 03-06-2008, 10:07 PM
  #9  
MMMmmmm.... Grits!!
 
ratlratl's Avatar
 
Join Date: Jul 2007
Location: HEART OF, NC
Posts: 1,031
Thanks: 0
Thanked 3 Times in 2 Posts
He has 3.73's.

Chris
ratlratl is offline  
Reply With Quote
Old 03-06-2008, 10:37 PM
  #10  
Registered User
 
Join Date: Feb 2005
Location: Arcola,tx
Posts: 136
Thanks: 0
Thanked 0 Times in 0 Posts
I'm at 2100 @ 70 mph what gears do I have?
Teamropinram85 is offline  
Reply With Quote
Old 03-07-2008, 12:03 PM
  #11  
Registered User
 
bigblock2stroke's Avatar
 
Join Date: Feb 2004
Posts: 1,147
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by Teamropinram85 View Post
I'm at 2100 @ 70 mph what gears do I have?
the only rear gear available for 07.5 with manual trans was 3.73.

Starting in 08 model, you can get manual trans with 3.73 or 3.42.

at 2100 at 70mph with g56 manual trans you have the 3.73's.
bigblock2stroke is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wizkid
3rd Generation Ram - Non Drivetrain - All Years
7
05-22-2006 09:43 PM
ramtd02
Performance and Accessories 2nd gen only
5
03-26-2006 01:58 PM
StrokeThis2500
Other
4
02-16-2006 01:47 PM
dieslcruisrhead
General Diesel Discussion
11
01-19-2005 10:50 AM
slighfoxs3500
24 Valve Engine and Drivetrain
4
10-12-2003 11:42 AM


Thread Tools
Search this Thread
Quick Reply: Can't figure out what gear ratio I have


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.