shmoesjk

I got a 4 door Rubi Automatic and am gonna run 35s. I do alot of Highway 70mph driving. Which would be better for me? 4.88, 5.13 or 5.33

REL1203

I am in the same boat... 95% of my driving is highway at 70MPH

Skippman

From what's been said here 4.88's are right out. They'd put you back to factory which, sad to say, is sub par. I'd recommend running 5.13's based on JPops recommendations.

I personally plan to run 5.38's to help compensate for my armor.

JPop

I would actually recommend 5.38s unless you're running a D30 where they aren't available. An even steeper gear set would be more in line for either the D44s or D30s if they were available.

l2chil

One thing to keep in mind is were you are driving. If the areas that you are driving 70 mph are somewhat flat with some elevation changes then you will remain in fourth with little effort.
Running 5.38 auto 4th gear my RPM's, run around 2500>2600. This is really closer to were this motor should be running for effeciency. At least that how I understand it. If I had to do it over again it would be 5.38 no question.
Once you start adding weight it really starts to make more sense.

NewfieScreech

Biggest difference I found was when I did the chip.