What kind of spring perches to use on MJ

I'm doing SOA on the rear of my MJ. Do I have to use MJ rear spring perches or will XJ perches work?

a perch is a perch

What matters would be the size of the axle tube. Measure the diameter and use this to purchase the right size mounts.

Mounts:
http://abctrailerparts.com/spring-seats.html
http://store.summitracing.com/default.asp?target=partdetail.asp?part=MSR-7220

If you try using MJ perches, they'll be upside down. That will make the axle invert itself so the perches are in the proper orientation. When the axle goes over, the Jeep will roll right over with it.


As long as the perches are for a 2.5" wide leaf, you'll be ok. XJ, MJ, YJ (but not TJ), Dakota, S-10, Waggy, whatever. If the axle tube diameter is different, you can grind out the perch some to make it fit.

BrettM said:

a perch is a perch

Click to expand...

Not exactly.

The perches on an MJ 44 are cast/solid, where the ones (on an 8.25 anyway) on an XJ are bent metal plate. It's possible one could remove and reuse the OEM MJ...or buy some new from the dealer(Ghost had the part# and they were pretty inexpensive-$15 IIRC-and looked it), but why be cheap on these fairly critical pieces?

When I built my first SOA MJ 44 axle, I used the Rubicon Express (#1930 IIRC) perches, then for the second one I used Mountain Off Road (MORE) pads. The MORE seemed a bit beefier than RE. Both are tons beefier than OEM XJ pieces. FWIW I have MORE perches sitting here for my third MJ 44 axle.

Granted that there are a million XJs running around with OEM perches that hold up just fine... so I doubt there is anything horribly lacking with them, but at least consider the other options, and at the end of the day you can decide if the $15 perches will be up to the task. I sleep lots better at night knowing the MORE perches are on mine :dunno:

Then there is that whole "anti-wrap" thing that comes with the perches being a bit longer than OEM, and the adjustable wheelbase thing that the MORE and RE offer (sure, one could drill offset holes in their thin/short OEM pads if they "had to have" adj.WB)

HTH from someone who has been there a time or two. I'll cut corners if I think it's a good idea. Cutting corners on stuff that attaches my suspension isn't, IMHO

woody said:

Not exactly...

Click to expand...

If he wants the easy answer I'll give it to him. If he wants the long version, he can search for it. That's just my take on using the forums, but thanks for posting that stuff, it's good info.

:cheers:

LOL most questions worthy of answering have three possible answers: Yes, No, or Maybe. I sometimes get bored and like to fill in the blanks with a little why & how

It's a sad state of affairs when the hardest I've thought all day was about the merits of various little bent-metal objects.

woody said:

It's a sad state of affairs when the hardest I've thought all day was about the merits of various little bent-metal objects.

Click to expand...

Leave my kids out of this!

I got mine from MORE. www.mountainoffroad.com Beefy and supposedly help with axle wrap. THey certainly are much longer than stock.