Shane Posted January 8, 2009 Share Posted January 8, 2009 God Bless them, my whole family chipped in and for Christmas I got a 3'' skyjacker lift. Now I am wanting some 31x10.50 BFGs AT or MT. Will I need to do anything to the gearing of my MJ. It is an 89 automatic 4x4. This is a daily driver that will not see rough trails, maybe a walk in the woods from time to time. As always all advice is appreciated. Thanks Shane Link to comment Share on other sites More sharing options...
MWinland Posted January 8, 2009 Share Posted January 8, 2009 I have an '89 swb 4x4 with 31s. Prior to regearing, I had 3.55s. Now I'm running 4.10s. World of difference. It felt like I was dragging an anchor with the 3.55s. Based on my personal experience, I recommend 4.10s. Link to comment Share on other sites More sharing options...
BLHTAZ Posted January 8, 2009 Share Posted January 8, 2009 You will not "need" to change the gears, but depending on what you do with it, you may want to. I have 31" Swampers on mine with 3.07 gears and while it is a bit sluggish to say the least, it is a street truck only so I have not worried with it. It is slow on take off and only gets about 15-16 MPG on average. For what you describe the use of the truck to be...you should be fine with what you have. Link to comment Share on other sites More sharing options...
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