I know that most of us have 3.73 gearing, but what kind of fuel economy does the CRD get with 3.54 gears? Anyone have 3.54? If I recall it was only an option for the Sport model.

Lewis

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Mail Rated 2005 Red CRD Sport with large rectangular hole in top right behind the EVIC and above the heated leather seats.
2004 Jetta TDI

I believe you recall wrong...or...Jeep does make mistakes on equipment option listings but the 3.73 was the only ratio used in the CRDs

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Founder of L.O.S.T.
2006 CRD Sport
Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper
Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph

I think 3.55 was an option on some models, but 3.73 was the only one on the CRD. I remember trying to build one on their website with 3.55s and the diesel, but the choices were incompatible.

It was an option on the Jeep website, could have been an error.
Lewis

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Mail Rated 2005 Red CRD Sport with large rectangular hole in top right behind the EVIC and above the heated leather seats.
2004 Jetta TDI

3.54 axle ratio was only with a 6-speed manual and not available with CRD.

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2005 CRD Limited Flame Red w/ Renegade rock rails & light bar, AirLift 1000. 225/75R16 MT/R's on cheap black steel wheels, dual MOPAR subwoofers, Ipod kit & seat covers, Samco hoses - totaled and gone. 2008 WK Laredo 3.0L diesel - AirLift 1000, wife won't let me mess with it much. 2013 JK Sahara on order.

Well, I'm a MPG freak, and fully believe that the engine has enough power to STILL pull 5k if the gearing is numerically dropped a bit... Has anyone looked into if parts are available, and how much it might be?

basically front and rear end from junkyard, and prolly a dealer ecu reprogram for speed reading.

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

Can get 2.2% drop by changing to a 235/75/16...and see if it helps after you adjust the odometer readings...just pay attention to tire weight

Or go really crazy and become a "Hypermiler"... I am not condoning everything this guys does but some of the stuff (ridge riding, never idle, coasting to stops, airing up, ect) works and is not dangerous ( you will know which ones when you read it ) to do...If you are a mileage FREAK you will like this...and the Liberty odometer does not keep rolling when the key is off so it is hard to judge the "coasting"...

http://www.motherjones.com/news/feature ... ilers.html

Also this ratio/rpm/tire size chart might help:

http://www.4lo.com/calc/geartable.htm

_________________
Founder of L.O.S.T.
2006 CRD Sport
Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper
Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph