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33" tires and gears

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  #71  
Old 10-13-2010, 10:57 PM
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Ok dont know much about the speedo gears but that is what your gonna have to do to recalibrate your speedometer to show the right speed, you can do a search on the speedo gear to find more info, or pm Indy he knows about them and could be more help
 
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Old 10-14-2010, 10:58 AM
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Get a tuner and recalibrate the speedometer that way.
 
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Old 10-14-2010, 11:00 AM
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I can't find a tuner that will do that on a 1996. If you know any please let me know.
 
  #74  
Old 10-14-2010, 11:41 AM
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98 and up can be done with tuner, 97 under you change the gear in the trans. I saved this link from the last time this was discussed.

http://www.go.jeep-xj.info/HowtoSpeedoGears.htm
 
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Old 10-14-2010, 12:56 PM
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Thanks for the info guys. Helpful as always.
 
  #76  
Old 10-14-2010, 01:08 PM
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Alright so i popped the hood and I saw 3.2 for the gear ratio.Also something about a Chrysler 9.25 rear or near that.I will be getting some all terrains since I stay in the southern part of Guam.Oh yeah Guam is an island in the pacific if you don't know.If you watched Outdoor channel's Top Truck Challenge there is a competitor from here who did good.He's in the buggy class Joe Quichocho.
 
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Old 10-14-2010, 02:09 PM
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Damn that sucks, well if I was you I would regear before I went with bigger tires, having those gears must suck in city driving, but I bet If you had room you could win alot of races.
 
  #78  
Old 10-14-2010, 02:14 PM
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Originally Posted by zman17
Maybe it's just the tiny pic of your truck, but from what I can see, it looks like it has a leveling kit in it.

Nahhh if you go to my album the pics are bigger. It doesnt have any kind of lift, or leveling kit.
 
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Old 10-14-2010, 05:28 PM
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Originally Posted by JediSky671
Alright so i popped the hood and I saw 3.2 for the gear ratio.Also something about a Chrysler 9.25 rear or near that.I will be getting some all terrains since I stay in the southern part of Guam.Oh yeah Guam is an island in the pacific if you don't know.If you watched Outdoor channel's Top Truck Challenge there is a competitor from here who did good.He's in the buggy class Joe Quichocho.
3.2 ? I might be wrong as usual lately But I don't think Dodge Rams come with gears higher than 3:55's.
 
  #80  
Old 10-14-2010, 09:44 PM
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Originally Posted by zman17
3.2 ? I might be wrong as usual lately But I don't think Dodge Rams come with gears higher than 3:55's.
Well...sorry to tell you this...but my '97 1500 ext cab had 3:21's front and rear.

I'm not sure who's getting what gears for who after 8 pages, but I thought I'd include this handy gear ratio/rpm/tire chart.

http://www.jeep4x4center.com/jeep-ti...atio-chart.htm

Remember these rpms are caculated at a 65 mph, and you should subtract about 15% off the listed rpm at the given tires/gear block for overdrive...

As an example: a 33 (285/305) inch tire with 3:55 gears at 65 mph turns 2349 rpm X .85 =1996 rpm.

Another would be a 31 inch (245) tire with 3:55 gears at 65 mph turning 2501 rpm x .85 =2123 rpm

One wouldn't think that 126 rpm wouldn't make much of a difference, but given the aerodynamics of a taller truck, heavier tires..and the fact that the motor torque peaks around 2500...those that run "33" inch tires with 3:55 gears can appreciate why thier truck lacks power and constantly shifts out of OD on hilly roads.
 

Last edited by dsertdog56; 10-14-2010 at 09:58 PM.


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