Dodge Cummins Diesel Forum banner
  • Hey everyone! Enter your ride HERE to be a part of September's Cummins of the Month Challenge!
1 - 12 of 12 Posts

·
Registered
Joined
·
838 Posts
Discussion Starter · #1 ·
my brother has an '05 QCLB CTD with a G56, 285/70r17 cooper atr's. i have an 07 QCLB CTD with a G56, 285/70r17 cooper atr's. both 3.73's. why is at 2000 rpm i'm at 75 and he's at 65. the speeds are exact, but i'm at right around 75 at 2k and he's right around 65. what's the deal? is it gearing in the transfer case?
 

·
Registered
Joined
·
10,780 Posts
Are you comparing them both on the highway side by side?

Either way, it could be a crappy tach or miscalibrated speedo...

Other than that i would say that someone (maybe the dealer) had changed the gears...
 

·
Registered
Joined
·
838 Posts
Discussion Starter · #3 ·
both were bought new, and before i calibrated the speedo, they were still different.
 

·
Registered
Joined
·
838 Posts
Discussion Starter · #5 ·
this is very interesting, he bought from the lewiston dodge dealership back in late 05 or early 06, told him it was 3.73. where does a guy look to figure this out. he's still under waranty if that matters, should the dealership fix this? because he's looking into putting higher geared rearends in it now for fuel mileage.
 

·
Registered
Joined
·
838 Posts
Discussion Starter · #8 ·
i don't care for the dealer he bought it from, i'd still throw a fit with them. they sold hime something that they didn't have.
 

·
Registered
Joined
·
5,210 Posts
unless he has proof that they told him that he has 3.73's (i.e window sticker maybe) and he can show that they are not 3.73's he doesn't have a chance
 

·
Registered
Joined
·
838 Posts
Discussion Starter · #10 ·
i know he's still got the window sticker, i saw it in jockey box last time i was home. and a part number should show what rear end is in it correct?
 

·
Registered
Joined
·
5,210 Posts
Yes, you will need the part mumber off the gear set. But before you go searching for that put the rear up on jack stands, and spin the tire one full rotation and cont the rotations of the driveshaft, it should spin 3.73 times with 3.73 gears. When you confirm they are not 3.73's, go in and talk to the maneger of the dealership and if they decline your request to change the gear set, then....in an area where potential customers can hear you, raise your voice and state that it is false advertising and if the problem is not resolved you will take them to court...this will get their attention. :thumbsup
 

·
Registered
Joined
·
838 Posts
Discussion Starter · #12 ·
it wouldn't be the first time they'd hear me or my brother or my grandfather raise our voices there.... we don't have the best relationship with them
 
1 - 12 of 12 Posts
Top