what is XJ or MJ rear axle spring perch width?

[BrettM]

Does anyone know what the width is between perches on an XJ or MJ rear axle (I know that MJs are a bit narrower)? this doesn't need to be exact either, within an inch should be fine. I would go measure mine, but it's 2200 miles away

thanks

 

[BrettM]

maybe I should add this: what I'm really wondering is if I can fit a 35" tire between the frame-rails of my MJ? if anyone knows that for sure that would be awesome, but other wise I could figure it out based off perch width.

 

[Eagle]

I have a shortbed with a 31" spare.

Laterally, without measuring it appears there is BARELY enough space for 2 more inches on each side -- but if the axle shifts laterally when flexing the springs are going to rub the tire.

The 31 takes up ALL the space in the stock spare location. Behind the tire there is only about 1/4" of clearance, and the radius of the sheet metal pan seems to be about 31.5" so even if you moved the spare forward, it would be an awkward fit.

And moving it forward isn't much of an option because there's only about 2 to 3 inches in fron of the spare to the diff.

All in all, I'd say for a shortbed a 31x10.50 is about the limit. You might squeeze a 32 in there, but there's no way a 35 is going to work. A longbed might be slightly better.

 

[BrettM]

i'm only concerned about width, don't let you mind be limited by sheetmetal, sawzalls are fun

thanks though! sounds like it's close enough that the only way to know for sure is gonna be to try it

 

[Kernel]

i could go home and put a 35 from my xj on my mj. get back to you later.

 

[red91]

when I did my MJ to XJ dana 44 conversion I believe that the MJ sits in just a little more than the XJ does on the spring perches. The width , overall is the SAME.

 

[BrettM]

when I did my MJ to XJ dana 44 conversion I believe that the MJ sits in just a little more than the XJ does on the spring perches. The width , overall is the SAME.

yes, I am well aware of that. besides, I have a Toyota axle in the rear now

i'm gonna hack up the back half of my bed and build a tire carrier also, I'm wondering if I'll be able to sink the tire between the frame rails at all. the lower i can get that weight the better

 

[Kernel]

i need a chew and it's in the truck. i'll be right back with your measurement.

 

[BrettM]

i need a chew and it's in the truck. i'll be right back with your measurement.

AWESOME!

 

[Kernel]

39-1/2" from inside to inside of the spring purch. give or take an 1/8.

edit: this is on my mj

 

[XJ_ranger]

i need a chew and it's in the truck. i'll be right back with your measurement.

i love the culture that comes out when people are helping others... Fun times!

 

[BrettM]

39-1/2" from inside to inside of the spring purch. give or take an 1/8.

edit: this is on my mj

thanks man! sounds like it'll fit no problem!

 

[Kernel]

i love the culture that comes out when people are helping others... Fun times!

just another excuse to get out of the office. :badpc:

 

[Kernel]

thanks man! sounds like it'll fit no problem!

should have looked to see if there was anything else under there. everthing is hackable thought.

 

[BrettM]

everything's hackable except that big X between the rails, but I don't think that'll get in the way with how I'm planning to do it.

 

[MC-92]

I know the perches on a xj are 46" outside to outside...