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35's with 3.21 Gears

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Old 01-27-2011, 08:53 AM
  #41  
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Originally Posted by medic_23387
Just drove back from work 60miles and reset my MPG reader and in 6th gear at 65MPH I get 25 MPG easy sometimes 26. In the city I get around 19-21. I drive pretty easy but not like a granny. I try to shift around 2100-2200 to keep the RPM's down. Does anyone have an idea why I am getting such good MPG's. It is super flat on the interstate I drive on.
Originally Posted by crazyloggy
there is just no possible way you get that good as a average, fill your tank up hit the trip meter and let it get to a half a tank and fill it up again. then take your miles driven divided by gallons it took to fill it back up, then post up the MPG's. those MPG readings are highly inaccurate mine said 18.5 all the time but I'm lucky to get 14.5 MPG,s in reality.
Sounds to me like he was already driving down the highway at 65 mph when he hit the reset button and read the reading before he had to stop. Nothing kills mileage like burning gas while going nowhere.
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Old 01-27-2011, 02:13 PM
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Originally Posted by bearstylez
Are you gonna try to keep the 3:21 gears for awhile?
I'm gonna give it a try.
Originally Posted by medic_23387
Please post back with your results because I am ready to buy my new tires an I can't decide if I'm going with 33's or 35's your results will have a big impact on my decision
The first warm day I get they'll be going on with some flat flares.
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Old 01-27-2011, 02:37 PM
  #43  
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[QUOTE=crazyloggy;2060252]there is just no possible way you get that good as a average, fill your tank up hit the trip meter and let it get to a half a tank and fill it up again. then take your miles driven divided by gallons it took to fill it back up, then post up the MPG's. those MPG readings are highly inaccurate mine said 18.5 all the time but I'm lucky to get 14.5 MPG,s in reality.[

I have checked it manually and my reader in the Jeep is only off by 0.5 MPG's. So there IS a possible way I just don't understand why mine is so good.
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Old 01-27-2011, 02:39 PM
  #44  
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I drive 120 miles round trip to work and back and I do not run out 1/4 of a tank.
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Old 01-27-2011, 03:57 PM
  #45  
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Originally Posted by crazyloggy
there is just no possible way you get that good as a average, fill your tank up hit the trip meter and let it get to a half a tank and fill it up again. then take your miles driven divided by gallons it took to fill it back up, then post up the MPG's. those MPG readings are highly inaccurate mine said 18.5 all the time but I'm lucky to get 14.5 MPG,s in reality.
Is your speedo been corrected to adjust from your stockers to 35's. If you have not adjusted or corrected your speedo for 35's then you have to take on the % out from stock tires to 35's to your miles travelled as well to get a more accurate MPG.
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Old 01-27-2011, 05:22 PM
  #46  
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Originally Posted by medic_23387
I have the 3.21 gears in my jeep and I know 35's will make it sluggish but I have almost no hills in my driving area. I do 65 on the interstate with my stock 32's and get 25-26MPG's. Knowing this how bad do you all think the 35's will hurt my interstate millage. I plan to regear in about a year.
In my opinion the sluggishness will far outweigh any drop in fuel efficiency. I had 3.21's with 33's and it was barely acceptable. Can't imagine it with 35's. Also, mine was 6-speed. If you have auto, you take another hit.

Either ditch the idea or regear ASAP.
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Old 01-27-2011, 05:42 PM
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Yeah I think I am going to go with 33's and a flashpaq for this set but the next set I will have my new gears and join the 35's club!!!
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Old 01-27-2011, 05:57 PM
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I've run 37's on 3.73 gears for over a year as a daily driver and have gotten 15-16 city and 24-28 hwy, in the mountains nonetheless. NOT saying that this is a good idea. But i almost never have mine in 6th gear except when going downhill.
also with mild wheeling i've bent the D30... NOT COVERED BY WARRANTY.

so rock the big rubber and have fun but look out for the D wobble!
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Old 01-27-2011, 06:29 PM
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35" w/3:73 in a manual is fine would be better w/4:88 Auto you can get by w/4:88 but 5:13 are better and all this talk about 20+MPG and 35" and bigger tires I'm calling BS. I must have a hole in my gas tank mine wouldn't get that stock. I would rather use more gas than oil and my motors not run 4000 rps all the time. Just my thoughts
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Old 01-27-2011, 06:33 PM
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Originally Posted by Anaya
35" w/3:73 in a manual is fine would be better w/4:88 Auto you can get by w/4:88 but 5:13 are better and all this talk about 20+MPG and 35" and bigger tires I'm calling BS. I must have a hole in my gas tank mine wouldn't get that stock. I would rather use more gas than oil and my motors not run 4000 rps all the time. Just my thoughts
I don't get that MPG with 35's mine is still stock.
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