hey I am ordering my gears and lockers on the 15th of this month and wanted to know how bad it would be do drive my jeep on the highway 70mph with 33 and 4.88s! I might want to step up to 35s one day not for awhile but I would rather be over geared than under geared! I don't want to mess up and get the wrong gears! So help me decide 4.56 or 4.88!

 

I'd go with 4.56s if it's your dd and you drive on the highway. If it's a trail rig only I'd go with 4.88s. I dd mine so I went with 4.56s.

 

I run a 4.56 in the back of mine with 31's... it was fine at 75mph. Spedo is off like 7mph though.

 

Agreed, dd go with 4.56s you will still be one above factory ratio with the 33's. This is the same as my setup and I love it!

You can get a speedo gear cheap on ebay to correct it

 

auto or stick?

if its auto and u plan on going to 35s later, do 4:88. If it's stick and u want to stay w/33s. 4:56.

 

I have the aw4 auto! I just want to regear once and I might step up to 35s one day! does any one run 4.88 and 33s?

 

I'd go with the 4.88's like you said " rather be over geared than under geared"

I'll be running 35's with 5.13's when mine is done

 

Where you buying your gears? How tough is it to swap?

 

With 4.56's and 33 in. tires at 70 mph, your rpm's would be - 2,438

With 4.56's and 35 in. tires at 70 mph, your rpm's would be - 2,298

With 4.88's and 33 in. tires at 70 mph, your rpm's would be - 2,609

With 4.88's and 35 in. tires at 70 mph, your rpm's would be - 2,460

That should be right.

 

5.13s what axle are you running? Those won't fit in an 8.25 or d35 or d30. The largest you can go is 4.88

Swapping gears is by no means a beginner job. Requires a few special tools and know how. Rusty's has great deals on gear packages!

 

If you're asking, you shouldn't be doing them. Get a professional to do the install.

 

Lol well said.

 

+1

 

are those numbers for the auto in over drive?

 

If you want to play around and see what your options are, head to this site: http://www.grimmjeeper.com/gears.html. Select your transmission and transfer case, put in numbers for tires and you should be good to go once you hit calculate. Hope this helps.