superchips
10-23-2011 | 01:11 PM
#1
Thread Starter
JK Enthusiast
Joined: Jul 2011
Posts: 111
Likes: 0
From: Springtucky, or
superchips
I bought the superchips programmer, my question is this:
I have an 07'jku Sahara, bought it used and have no clue what gears it has, the programmer said I have 4.10's...do I or how do I tell what gears I have
I have an 07'jku Sahara, bought it used and have no clue what gears it has, the programmer said I have 4.10's...do I or how do I tell what gears I have
10-23-2011 | 01:49 PM
#2
JK Super Freak
Joined: Mar 2008
Posts: 1,116
Likes: 1
From: Aurora, CO
You can jack up the rear axle and spin the tires and watch the pinion yoke. The yoke should spin about 4 times to the tires doing 1 complete rotation. Their also may be a tag on the rear axle that will say. 
10-24-2011 | 05:05 AM
#4
JK Enthusiast
Joined: Jul 2010
Posts: 111
Likes: 0
From: NW JERSEY
I believe that in 07 the 4:10 ratio came with the trailer tow pkg. the programmer will break down vin when you plug it in and i believe that it will set your stock ratio, but it also has option to change ratio if you change gears from factory.
10-24-2011 | 05:19 PM
#6
JK Freak
Joined: Sep 2011
Posts: 676
Likes: 0
From: Cabot, AR
I read the same things one several other threads and verified the information by getting the number off the diff cover. My 2007 has a tow package and does have 4:10. Dana 30 front and Dana 44 rear.