as the title states, i need to know what the difference is between the two and their pros/cons with each gear

 

Measure the tires and plug some numbers into the chart in the faq's.

Either will work, but 5.38's would be the better ratio for 37's. The 'con' would be that as you go higher (numerically), the gears get weaker. Not as big of an issue with an auto as with a manual, but something to consider if you have a heavy foot in the rocks.

 

Just dont try to do it yourself its not worth it!!! put 5.13s in this weekend... 3 days later they were installed and I now have a leak... FAIL!

 

Depend on where you live I have 5.13 and live in the mtns and have to turn o/d off alot

 

I have KM2 35's, I just got 5:38's last week.

With less than 150 miles on 5:38's, I already feel like I could use lower gearing just driving down the interstate (freeway) @ 65-75mph

I am flashed with 87 \ tow tune and I have CAI.

Maybe I need an S\C or hemi swap?

 

Good to know. We have 5.38 in with stock tires, was going to go 35s. Maybe I will go to a true 33 or a 34. Our Jeep goes back and forth to 'Dago several times a week, the lower gears are nice coming up the hills. Don't want to lose to many rpm's.

 

LOL


I was driving home today on I-5 north from Coronado Island to Leucadia blvd. I had a difficult time maintaining 70-75mph without it kicking down a gear (auto) going past PB, La Jolla, Del Mar and Solana Beach .

 

i have 37s with 5.38s. great no problems, love em

 

so it sounds like the 5.38s are preferable, how much of a difference in gas mileage is there? I live in middle tennessee and isnt too bad with the big hills, but there are some here and there.

 

Well, I only have about 150 miles on them. I drive mostly around town with lots of stoplights and stop signs. However, I did have about 40 miles of interstate thrown into my 12mpg hand calculated mileage

When I had 4:10's, I was getting around 10-11mpg?

With the 5:38 gearing, I also added CAI & flash 87\tow tune at the same time.