86customanche Posted January 11, 2012 Share Posted January 11, 2012 sounds about right. though I'd take 4.88s in a heartbeat with my 33s. :yes: I run 4.10s only because they were the deepest factory ratio in the axles I was trying to use. I'm running 4.10s as well only because I had a factory axle with those gears in it and it saves lots of money rather than regearing it all. I only have 31s now but I plan on going to 35s once Interco gets their sh*t together and makes some more :fs2: Link to comment Share on other sites More sharing options...
cody4359 Posted January 27, 2012 Share Posted January 27, 2012 found it: http://www.naxja.org/forum/showthread.php?t=1014821 Link to comment Share on other sites More sharing options...
SW86 Posted January 27, 2012 Author Share Posted January 27, 2012 good thing i decided to buy tires and rims first. i was seriously set on 4.56s/33s. figured its not my DD just a trail rig and cruise to the store once in awhile. i looked at the grim reaper chart and it seemed that i could get away with occasional 35s on 4.56s and still get okay gas mileage and power. that thread did slightly change my mind again to 4.88s but that tiny ring and pinion in the 30 really gives me the creeps. i guess its all luck of the draw on breaking one though cause some have had no problems as where others constantly break them :dunno: plus was it here that someone said only two teeth are touching on 4.88s at all times as where three are touching on 4.56s?? either way if you want to run 4.88s in the 8.25, ive looked into it and people who run the nitro gears say nothing but good about them. Link to comment Share on other sites More sharing options...
89eliminator Posted January 27, 2012 Share Posted January 27, 2012 i have personally 4 Dana 30 4.88 ring gears go boom on 35s. Link to comment Share on other sites More sharing options...
SW86 Posted January 27, 2012 Author Share Posted January 27, 2012 a guy in my local club on 35s and 4.88s in the 30. just trying to back up a small hill Link to comment Share on other sites More sharing options...
cody4359 Posted February 8, 2012 Share Posted February 8, 2012 swapped in the rear axle with 4.88 and i love it. 65 mph is 2500 rpm Link to comment Share on other sites More sharing options...
buffalob Posted February 8, 2012 Share Posted February 8, 2012 Ok what do the gear gurus reccomend.... I am ready to have my recently aquired axles re-geared. (thank you Troy yellowheep) They were 3.07s (Dana 30/44 combo) out of a 91 MJ. They are going into my 88' short bed presently 2X4 also with 3.07 rear. The wheels I went with are AEV pintler 8.5 X 17... The tires are procomp extreame muds 285/70/17 so for all comparison purposes 33 inch diameter. I will be keeping the renix 4.0 for the present untill the stroker goes in the transmission is a new AX-15 5-speed with a new NP231 from advance adapters. My initial thought was to only go to 4.10 gears (and a detroit out back) but after reading this thread I am wondering if I should reconsider and go to 4.56 gears. This is not my daily driver but will in all honesty spend way more time on the highway than the trails. I live in Denver and by highway driving I mead Starting at 5500' above sea level and going up from there. Any helpfulsuggestions are appreciated the gears go in this weekend. Thanks :dunno: Bob in Denver Link to comment Share on other sites More sharing options...
Exxon Valdez Jeep Posted February 8, 2012 Share Posted February 8, 2012 4.56s for sure. this is coming come somebody with 4.10s and 33s living at 6k above sea level. Link to comment Share on other sites More sharing options...
buffalob Posted February 8, 2012 Share Posted February 8, 2012 Thanks for the input.... All I needed was some validation that I was on the right track changing the ratio. I called the 4$4 shop and they are swapping the new gears to 4.56...with all the money for the lift, big brake kit (also AEV) wheels, tires, axles, re-gearing, trans, transfer case, stroker...yada yada yada I want to get it right the first time. :banana: :banana: :banana: Link to comment Share on other sites More sharing options...
SW86 Posted March 11, 2012 Author Share Posted March 11, 2012 FINALLY getting around to buying gears now. damn does it take me forever to do something to the MJ. anyway so i had to get a new carrier for the front cause i had 3.55 and down. it gets here tuesday. i guess I'm going pull the trigger on 4.88s. i could with 4.56s and save some cash through Rob (4wd) but I'm thinking in the end ill be happier with 4.88s. decisions, decisions :dunno: :shake: Link to comment Share on other sites More sharing options...
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