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Old 05-06-2009, 12:11 AM   #1
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answer this could mean keeping my jeep

ok so i know that this has been asked alot but. i'm getting to the point that i don't know if i can keep my jeep if i keep having gas milage issues. i know that the jeep is'nt the best for mileage but right now it plain sucks. so my question is if i re-gear what can i expect to get for mileage. so here is what i got i have a 05 wrangler 6 speed with 33's and as it sits i have 3.07 gears. so what would be the ideal gear for me to get better gas mileage????

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Old 05-06-2009, 12:24 AM   #2
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With the 6 speed and 33's you could go to 4.88's and still be sittin pretty in 6th on the highway. You'll probably get 3 or 4 miles per gallon back at least.

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Old 05-06-2009, 12:27 AM   #3
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Old 05-06-2009, 05:07 AM   #4
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with those gears and tires you have Im not suprised you wanna get rid of it. You gotta regear it.
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Old 05-06-2009, 05:48 AM   #5
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I am doing this with about 2hrs of sleep so might be a bit off.. but give you an idea anyway.

So lets look at this: Not sure your MPG now. but lets say its 14 mpg. use the plus 4mpg that makes new 18 mpg.

So using round numbers: TJ gas tank holds
20 gallons x 14= 280 miles per tank
20x 18= 360 miles per tank

difference of: 80 miles per tank more:

full tank @ $2.10 gal = $42 dollars
Fill up once a week: 1120 /1440 total miles base on old and new mpg

difference 320 miles more.. savings is about $37 per month or $444 a year or there abouts.. Cost of gear change is 1000-1500 so it would take you 2 to 3 years to start saving money on gas from the gear change.

Of course change the total number of miles mpg, etc and these figures will change a bit. Have you thought about just getting smaller tires for street driving? or a beater ricer to drive?
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Old 05-06-2009, 08:32 AM   #6
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Beaters are nice to have sometimes. But depends on what you pay for that too, just like the gears, to be profitable. :\
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Old 05-06-2009, 09:41 AM   #7
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If you add up the cost of a beater (even if you get it free) you still have to buy insurance for it. You would be better off just buying the gas. The insurance will cost more than the gas you save.
I have several motorcycles. It always cracks me up when guys talk about the money they are saving on gas by riding the bike. As if the money that they spent for the bike, insurance,clothes, boots, and skid lid came out of a different bucket.
Trim a few bucks out of your budget from another place and just drive what you have.
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Old 05-06-2009, 09:48 AM   #8
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Keep the jeep!
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Old 05-06-2009, 09:56 AM   #9
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Keep the Jeep and go buy a little Miata for about $3k and save your commute gas $money$ for Jeep stuff...
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Old 05-06-2009, 10:01 AM   #10
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Originally Posted by 4Jeepn View Post
I am doing this with about 2hrs of sleep so might be a bit off.. but give you an idea anyway.

So lets look at this: Not sure your MPG now. but lets say its 14 mpg. use the plus 4mpg that makes new 18 mpg.

So using round numbers: TJ gas tank holds
20 gallons x 14= 280 miles per tank
20x 18= 360 miles per tank

difference of: 80 miles per tank more:

full tank @ $2.10 gal = $42 dollars
Fill up once a week: 1120 /1440 total miles base on old and new mpg

difference 320 miles more.. savings is about $37 per month or $444 a year or there abouts.. Cost of gear change is 1000-1500 so it would take you 2 to 3 years to start saving money on gas from the gear change.

Of course change the total number of miles mpg, etc and these figures will change a bit. Have you thought about just getting smaller tires for street driving? or a beater ricer to drive?
Mostly true but the money saved is not the only benefit to regearing(more power,easier on the rest of your drivetrain and the feel of a whole new rig)Besides with that ratio I would say your bottom dollar is low!!! I have an auto and 3.07s with 33s and would love to see 14MPG .Mine hits 12 at best!!
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Old 05-06-2009, 10:18 AM   #11
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Mostly true but the money saved is not the only benefit to regearing(more power,easier on the rest of your drivetrain and the feel of a whole new rig)Besides with that ratio I would say your bottom dollar is low!!! I have an auto and 3.07s with 33s and would love to see 14MPG .Mine hits 12 at best!!
X2

I went from 3.73s to 4.56s because I just didn't like driving it with the 3.73s.... At HWY speeds (65mph) the RPMs are at about 2400.. I guarantee I am getting better mileage because I don't have to use so much throttle to get her up and going.. SLF is correct; it is like driving a new Jeep with the gears.. I was initially worried about it, but I am very pleased with the result. With 4.56 gearing I can now start off in 2nd gear and I have the 5-speed NV3550.. Go with the regear, but I don't know if I would go 4.88 unless you plan on going with 35" tires in the future..

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Old 05-06-2009, 12:14 PM   #12
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alrighty then i will do the regear. lucky for me my brother in law knows how to do gears so that should save me a lot of money. now could anybody give me a list of what i need to get for the regear??
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Old 05-06-2009, 03:22 PM   #13
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alrighty then i will do the regear. lucky for me my brother in law knows how to do gears so that should save me a lot of money. now could anybody give me a list of what i need to get for the regear??
ARB Air Locker
Alloy USA chromoly axles.... Kidding!

Please note: your speedometer is going to be way off, so you will need a 39 tooth gear which are semi-hard to come-by.. I am currently running a 36 tooth and I am about 5mph ahead and doesn't bother me that much.. Makes me think I am getting better gas mileage..

You can get away with just the Ring & Pinion, but an Overhaul kit is probably a good idea..

Gears: Northridge4x4 Jeep Parts: Gear Sets
Overhaul: Northridge4x4 Jeep Parts: Install & Overhaul Kits

By the way; I am pissed how much prices have come down since I did this in freaking JANUARY!!!!
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Old 05-06-2009, 03:34 PM   #14
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I just re-geared from 3.07 to 4.10. You have to take into consideration that going from 3.07 to 4.56 or 4.88 will require a different carrier, which will add to the cost of the regear. However, the increase in responsiveness is well worth the cost. I re-geared for the power restoration, not gas milage. The MPG increase was just an added benefit!
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Old 05-06-2009, 03:38 PM   #15
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You can get thick cut gears if you go above the case break in the Dana's. They use the same carriers in the Rubicons that run 4.10's. They just use thick cut gears or rubicon gears depending on the vendor. The only differance when using the thick cut gears is one needs to drill and tap the holes in the carrier slightly larger. If you are running open carriers, a new carrier cost about 50$ not that much of an increase.
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Old 05-06-2009, 03:55 PM   #16
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How many years do you think it would take to recoupe the cost of the typical $1100-1200 regearing cost with any possible realistic (minor) gasoline cost savings? More years than I think either of us would consider worth waiting for.
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Old 05-06-2009, 04:40 PM   #17
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How many years do you think it would take to recoupe the cost of the typical $1100-1200 regearing cost with any possible realistic (minor) gasoline cost savings? More years than I think either of us would consider worth waiting for.
Huh what huh We all own Jeeps , what is this saving money thing you refer to All jokes aside how many of us have bought a Jeep to save money.I bought mine knowing full well I would end up with a list as long as the national debt.A Jeep for the most part is a never ending work order.
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Old 05-06-2009, 04:45 PM   #18
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How many years do you think it would take to recoupe the cost of the typical $1100-1200 regearing cost with any possible realistic (minor) gasoline cost savings? More years than I think either of us would consider worth waiting for.
Where can you get a regearing job done for $1100-$1200? I really need to move away from PA.
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Old 05-07-2009, 12:33 AM   #19
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thank you everybody for the input and info i have decided to just do the re gear becasue my wife or i cannot stand to get rid of our jeep we want to pass it on to our kids some day
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Old 05-07-2009, 02:04 AM   #20
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thank you everybody for the input and info i have decided to just do the re gear becasue my wife or i cannot stand to get rid of our jeep we want to pass it on to our kids some day
Good call!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 05-07-2009, 02:52 AM   #21
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i gave up on gas saving.. i get 14mpg.. i only keep the jeep for when the world comes to an end and people are stuck in traffic.. ill just crawl pass by; because i can..lol
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Old 05-07-2009, 04:41 AM   #22
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I hope you decide to keep your jeep. My 04 with the 4.0 only averages 14 to 15 in the city. And I am sure I speak for most here that they are a lot of fun to own! and when people ask me why I keep it with such terrible gas mileage, I just smile and say " it's a jeep thing you wouldn't understand."
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Old 05-07-2009, 07:40 AM   #23
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i have 3.73's and 32's and i feel lucky when i get 12mpg
didnt think putting a lift and 32's would have changed it that much.
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Old 05-07-2009, 08:31 AM   #24
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If it makes you feel better I am on 3.55's on 35's. I get about 160 miles to a tank.
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Old 05-07-2009, 08:43 AM   #25
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alrighty then i will do the regear. lucky for me my brother in law knows how to do gears so that should save me a lot of money. now could anybody give me a list of what i need to get for the regear??
gears & master install kits, if your bro in law has the rest of the tools.

plan on spending a whole day doing the job.

and dont put synthetic lube back in the axles. Use Dino, it handles the shock load better.
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Old 05-07-2009, 03:39 PM   #26
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If it makes you feel better I am on 3.55's on 35's. I get about 160 miles to a tank.

I get a bit more then that.. but not much. 177-180... round there
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Old 05-07-2009, 09:17 PM   #27
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NEWS ALERT: i got the loan to pay some debt off and to get the gears and stuff so now i can keep my jeep!!!
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Old 05-08-2009, 01:48 AM   #28
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cool you paid the debt with another debt..lol.. life it is wat it is.. if I had the $$$
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Old 05-08-2009, 02:25 AM   #29
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true but i had a lot of equity in my jeep and got a lower apr rate in the process and to top it off i saved about 130 dollars a month in refinancing so now life is better then it was

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