going to 4.56. hope it's better choice than 4.88...

T

tkkim

New member
my jk is 2012.

I have 34" tire and will go 35" later.

I really thought about between 34" and 35", but I'm not hard core rock crawler person and I like road trip + moderate off road.

so I choose 4.56 instead 4.88 for better for freeway and good torque too..

did I make right decision? the shop recommend me 4.88... but almost 3k rpm at 70mph..

how do you guys think?
 
cozdude

cozdude

Guy with a Red 2-Door
Auto or stick? It makes all the difference as to which you have and what gears will work for your jeep


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cozdude

cozdude

Guy with a Red 2-Door
Here is a chart Eddie provided us in the movie write up he has on gear ratios. Like I said it depends on your tranny as to which will work best.

ImageUploadedByWAYALIFE1366147861.174259.jpg


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Holeshot

Holeshot

Banned
IMHO, If you have a 2012, 3.6L, and has 3.73 ratio, you should be just fine for every day use and moderate trails. Just stick to it. This is what I got on mine, and the only complain I have is that it is too fast for rock crawling with a standart tranny. If you have an auto, it'll be just fine as well.

BUT, if you have 3.21 ratio, you better upgrade.
 
Rivertoys

Rivertoys

New member
3:73 and 32 is middle green. 4:56 and 34 is in the blue.

I have done all the homework I'm going to do on this subject, and I will be going to 4:56. I do too much Frwy (even to get to mountains, deserts, and trails) and I personally think 4:88 will be too much for more or less daily driving.

Having a manual tranny, the 3:73 is not terrible. I have pretty much lost use of 6th gear, but it's not a big deal.
 
Holeshot

Holeshot

Banned
Rivertoys said:
Having a manual tranny, the 3:73 is not terrible. I have pretty much lost use of 6th gear, but it's not a big deal.
Click to expand...

heh? :thinking:

I have 3,73 with 35's and manual tranny on my 2012. The 3.6 is not affraid of those 35 at all. I drive the 6th gear on the highway over 90 km/h (55mph). I'm around 2000 rpm at 60 mph and its just fine.
 
Rivertoys

Rivertoys

New member
Holeshot said:
heh? :thinking:

I have 3,73 with 35's and manual tranny on my 2012. The 3.6 is not affraid of those 35 at all. I drive the 6th gear on the highway over 90 km/h (55mph). I'm around 2000 rpm at 60 mph and its just fine.
Click to expand...

I think my 3.8 makes less power than your 3.6. I use 6th, on really flat ground.... Or a slight downgrade. I wouldn't call it just fine though. But that's subjective too...
 
Holeshot

Holeshot

Banned
Rivertoys said:
I think my 3.8 makes less power than your 3.6. I use 6th, on really flat ground.... Or a slight downgrade. I wouldn't call it just fine though. But that's subjective too...
Click to expand...

ok well, I was assuming you also had a 3.6 since the OP was talking about a '12. ;)
 
Dave_g

Dave_g

New member
I got the 3.6L and 4.10's on 35's. When I move up to 37's for the next set of shoes I will be re-gearing to 4.56 because I am scared of the 4.88's. In my old Cj2a I had as a teenager, I didn't have to worry about any of that, had 5 somethings on 33" tires in the Dana 30 front and Dana 41 rear... Only 55ish horsepower from the old 134 L head... 65 downhill with the overdrive though.
 
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