gear ratio?

dangerous06

dangerous06

diesel tech
Joined
Mar 24, 2008
Messages
3,564
Would like to know for sure what ratio i have! No tag on rear custom cover. Nothing in the glove box. 70mph = 2100 rpm with 225 70r 19.5 tires.
Also would an early model 1999 11.5 gear set fit in a 06 11.5? 3.54's I think!
 
There is a company that makes 3:42's for the AAM 11.5". I plan on doing that. You have 3:73's from factory. 4:10's would put you around 24-25000 at 70mph.
 
manual trans never came from the factory with 4.10's, 3.73 came in the majority of trucks being built, 4.10 option was only for auto equipped trucks, chrysler never offered the 3.42 option...

my truck with 33.4in tires at 2100-2200rpm does between 71-73mph
 
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I beg to differ. There is an 03 2500 manual trans with 4:10's sitting in the driveway as I type. Never say never. And yes your right 3:42's are not a factory option. An aftermarket company presently makes 3:42's for the 11.5 aam axles.
 
Cool so All I need to do is look for a wrecked 07.5 and up dually and grab the rear end IF it has 3.42's!
 
Yes, that is if 3.42s were an option for duallys. Im not sure on that one.
 
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