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Originally posted by smess
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JPK and comac90 nice posts I am i your camp.
First I will say I currently own all the following secnarios but one. I never take advice from someone that has never owned the exact scenario that they preach is the absolute answer no if's, ands, or but's.
ALL THE SCENARIOS BELOW ARE AUTO TRANNYS:
06 Rubicon with 5.13's and 35's- better punch off the line than stock, 70 mph 2200rpms. Perfect
08 Rubicon Unlimited with 345hp Hemi, 4.10's and 35's perfect.
09 2 Door Rubicon with 345hp Hemi 5.13, screams on the highway at 70mph, 75mph max r's are way too high burn gas like a mofo.
11 2 Door Rubicon Hemi VVT with Good Year 37" Kevlars, 4.10's. gets great gas mileage, I turn the overdrive off around town. Could use a 4.56 or 4.88 to be perfect right now gets incredable fuel economy and motor is not working at all.
When we did the 11 one mechanic said perfect keeping the 4.10 the other saud you are crazy. I said why I have a sports car, not running stop light to stop light. He said reason for 5 somethings is it puts the 4:1 transfer case right in the speed/gear/rpm range he like to be in for the type of off roading he does. OK- I see now for his application it works and he has short commute to work. So now everyone that comes in his shop neeeds to have what he has
If I was a tour guide in Moab Utah, a one stop light town I would do 5.13's and 37,s. Besides that I dont want to hear the muffler sounding like a Harley.
BTW the 08 Hemi Unlimited performed perfectly in 4 low rock crawling in Moab.
My freind has a 09 Unlimited six banger with 35,s and 4.88's. 45-65 mph all it does is up shift down shift up shift downshift, makes you want to vomit, He put a Ripp Supercharger on it, complete waste of money he said he got better economy and some improvement in the high end and the upper middle.
I just got a 12 Unlimited with 4.10's it will get 315's (34.4's) and will be perfect, I could not imagine a Sahara with 3.21's. It must get good fuel economy but I wouldnt put any tires on it unless I was building it for my grandma.
When I say perfect I mean that all around low end and mid range and high end you get decent performance and economy.
I dont know what it is about the I-6 in the TJ but that 5.13 and 35's gives you low end without reving out the high end at 70mph. Its no Hemi bu it is a pleasure to drive vs that turkey 07-11 POS motor. Dont get me wrong its a nice snooth running motor for a stock Jeep and a female.
Please everyone that takes a firm position on your posts invest 59 dollars in an ecomoter, made by autometer and is in the mopar catalogue. It will tell you where the sweet spot is for your exact Jeep with your altitude, mods, gear, humidity, etc.
See what the ecometer says compared to the graphs and other peoples posts,
You can get it at the dealer if they give you a decent price or ebay all day long for 60 buckss, dont forget to read the instructions becuase you have to set it for your motor and then leave it in instant mpg mode.
http://www.mopar-accessories.com/en-...ubGroupId=3360
First I will say I currently own all the following secnarios but one. I never take advice from someone that has never owned the exact scenario that they preach is the absolute answer no if's, ands, or but's.
ALL THE SCENARIOS BELOW ARE AUTO TRANNYS:
06 Rubicon with 5.13's and 35's- better punch off the line than stock, 70 mph 2200rpms. Perfect
08 Rubicon Unlimited with 345hp Hemi, 4.10's and 35's perfect.
09 2 Door Rubicon with 345hp Hemi 5.13, screams on the highway at 70mph, 75mph max r's are way too high burn gas like a mofo.
11 2 Door Rubicon Hemi VVT with Good Year 37" Kevlars, 4.10's. gets great gas mileage, I turn the overdrive off around town. Could use a 4.56 or 4.88 to be perfect right now gets incredable fuel economy and motor is not working at all.
When we did the 11 one mechanic said perfect keeping the 4.10 the other saud you are crazy. I said why I have a sports car, not running stop light to stop light. He said reason for 5 somethings is it puts the 4:1 transfer case right in the speed/gear/rpm range he like to be in for the type of off roading he does. OK- I see now for his application it works and he has short commute to work. So now everyone that comes in his shop neeeds to have what he has
If I was a tour guide in Moab Utah, a one stop light town I would do 5.13's and 37,s. Besides that I dont want to hear the muffler sounding like a Harley.
BTW the 08 Hemi Unlimited performed perfectly in 4 low rock crawling in Moab.
My freind has a 09 Unlimited six banger with 35,s and 4.88's. 45-65 mph all it does is up shift down shift up shift downshift, makes you want to vomit, He put a Ripp Supercharger on it, complete waste of money he said he got better economy and some improvement in the high end and the upper middle.
I just got a 12 Unlimited with 4.10's it will get 315's (34.4's) and will be perfect, I could not imagine a Sahara with 3.21's. It must get good fuel economy but I wouldnt put any tires on it unless I was building it for my grandma.
When I say perfect I mean that all around low end and mid range and high end you get decent performance and economy.
I dont know what it is about the I-6 in the TJ but that 5.13 and 35's gives you low end without reving out the high end at 70mph. Its no Hemi bu it is a pleasure to drive vs that turkey 07-11 POS motor. Dont get me wrong its a nice snooth running motor for a stock Jeep and a female.
Please everyone that takes a firm position on your posts invest 59 dollars in an ecomoter, made by autometer and is in the mopar catalogue. It will tell you where the sweet spot is for your exact Jeep with your altitude, mods, gear, humidity, etc.
See what the ecometer says compared to the graphs and other peoples posts,
You can get it at the dealer if they give you a decent price or ebay all day long for 60 buckss, dont forget to read the instructions becuase you have to set it for your motor and then leave it in instant mpg mode.
http://www.mopar-accessories.com/en-...ubGroupId=3360
Jason
So I guess we are all still waiting on the Pro-cal fix. I was on the highway today and with my 3.21s I was turning below 2k at close to 80mph. It would be nice to have that kind of ratio for the highway but definitely need something different around town. I guess you can't space out the transmission's gears that much???? Anyway - WAITING!!!!!!
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