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to anyone wondering what 31s look like on a stock 4x4 ...


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They look GREAT!! 8) Much better than my 88 *ever* did back when it wore 30s. Static tests indicate that it's *real* close to rubbing on the control arms and will probably touch a bit when manuvering in a parking lot. I won't know for a couple months though, as the truck isn't driveable until I fix the slave cylinder. But by the time it's driveable, I will have swapped in 3.55 geared axles, so I can't do any testing with the stock 3.07s. Oh well. :D I plan to add a second main leaf to the packs (just like I did on the 88 ) and then add maybe an inch spacer to the front just so it matches the rear.

Jeep on!

--Pete

 

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I guess 3.55s make sense if you have them already, but with 31s 4.10s would be the ideal choice and 3.73s would be much better than 3.55s. Running 31s and 3.73s in mine I found that the overall final drive ratio works out exactly the same as stock tires with 3.55 gears.

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3.07s with 31's suck, I'm running it till I do a rear 8.8

They will rub at full lock

The rears will rub the frame rail if you air them down and stuff them, no big deal, nothing sharp back there to cut them. I wheeled at WF with 31's, didn't have any rubbage up front, I think it tok only oe washer under the steering stop to solve full lock.

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Those 31's on stock wheels....they're gonna rub at full lock. I have some AT 235/75 :oops: recaps on now (on stock wheels) that the driverside only rubs at full lock on the LCA. I couldn't imagine what a 31 would do.

 

Plenty of room in the rear, tho....

 

Jeff

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I'd swap the 4.10s from my 86 over if it wasn't for the amount of effort that that particular front end woud need to be up to snuff. But then I guarantee the 86 couldn't move under it's own power with anything less than 4.10s. :roll: I paid an exorbitant amount for the Dana 44 (didn't know any better at the time) and since I'll never be able to recoup the cost, I've decided that I'll just keep it forever and just reuse it in my various MJs over the years. :D Plus 3.55 XJ front axles are EVERYWHERE right? :D Maybe I'll swap the rear over first and decide if it's enough. If not, then at least I didn't just buy a 3.55 front axle first. I liked the 88 when I upgraded to this 3.55 D-44 from the 3.07s. It had 30" tires at the time, so I'm hoping that it'll be somewhat close to that amount of fun with this new truck. The engine feels pretty darn peppy for 210k miles.

Jeep on!

--Pete

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Those 31's on stock wheels....they're gonna rub at full lock. I have some AT 235/75 :oops: recaps on now (on stock wheels) that the driverside only rubs at full lock on the LCA. I couldn't imagine what a 31 would do.

 

Plenty of room in the rear, tho....

 

Jeff

it's actually not that bad. I had to put one washer under the steering stop. It's about 1/8 of a wheel turn from full lock in the box that the tires start to rub on mine.

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I'll wait to see how bad it is before doing anything, but I've contemplated cutting the control arm for clearance. But I could also go for the ZJ or WJ or whatever Jeep it is that has arms that are bent for clearance already. It's only beneficial on a near stock rig, but that's what I've got. :D

Jeep on!

--Pete

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Its WJ control arms. While you are at it pull the whole front axles, that way you get the hi-steer they came with. (passenger side knuckles are different. Very similar to the Terra flex Hi-steer knuckle)

 

If I knew anyone auctually would install 3.55's I would have never thrown away those 3.55 gears and axle housings. :shock: Persoanllty I would swap in the whole front axle instead of just changing the gears. After you buy an install kit and soend the better part of a day doing the gear swap, it would have been just as easyto swap axles.

 

 

 

Patrick

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Don't worry, I *am* swapping in whole axle assemblies. There are three things I would GLADLY pay a professional to do; rebuild an automatic, welding parts on which I'm staking my life, setting up gears. And I'd never ever pay to have a stock ratio installed when axles are out there for $100 or less. It just doesn't make any sense to do it any other way. I'll be snagging a 3.55/non-CAD/297-joint front axle for my newest baby. The WJ arms may have to wait though, as the pull-your-part 'yard near me won't have anything that new. Out of curiousity though, did the WJ go to low-pinion like the XJ in 00 or 01 or whatever year it was?

Jeep on!

--Pete

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To be honest Pete, I really don't know. I just know one of my buddies worked at the dealer, and somehow got a hold of the knuckles form a WJ, and swapped them onto his TJ. Of course this was before Terra came out with their d30 hi-steer conversion. This is a nice conversion, but save your money and don't buy the steering links if you decide to go this way. Do like I ended up doing, and install 1ton chevy TRE and ream out your stock knuckle. BUy some 18tpi threaded insserts for 1.5X.25 DOM and call it good. All told cost me 78 bucks to build my new center link.

 

 

Patrick

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