randimal Posted August 9, 2006 Posted August 9, 2006 Someone mentioned that cherokee axles don't fit SPOA on MJs. Thats too bad. I was just hoping to bolt one on. Whats the problem? Spring pads to narrow?
CWLONGSHOT Posted August 9, 2006 Posted August 9, 2006 Spring pads and shock mounts are wrong. but it NO BIGGIE!!! Find a buddie with a welder or rent one...Remove old perches, clean up area where they where. Install axle with perches loose on tube. Adjust your pinion angle, TACK WELD perches in place and move and weld....done!! CW
Bounty Hunter Posted August 9, 2006 Posted August 9, 2006 Ya, spring perches on the XJ are too close together. Even if at the right spacing, you'd likely want to cut and reweld for the proper pinion angle. Get any axle you want and weld up some spring perches. I went with the 8.8 in the 4.10 flavor.
randimal Posted August 9, 2006 Author Posted August 9, 2006 8.8... I've always thought about getting an 8.8. I have 4:10 gears now, and I believe 8.8s are pretty common in that gearing. How much narrower is it? If I remember correctly its only about .5 inch narrower per side. Much stronger too. spring perches... Yeah, I was planning on just welding on new ones. Question: can you take off the old ones with an angle grinder with cutting wheels? Thats the best cutting tool I have at the moment.
JOMJ87 Posted August 9, 2006 Posted August 9, 2006 You can but you have to make sure you grind all of the eccess down especially on the outside edge closest to the wheel. Cole
Bounty Hunter Posted August 9, 2006 Posted August 9, 2006 I generally remove mine with cutoff wheels. And the 8.8 is only about .5" or .75" narrower per side, commonly available in 4.10. I had a LS diff given to me that I installed as well, removing the open diff.
Pete M Posted August 9, 2006 Posted August 9, 2006 Ya, spring perches on the XJ are too far apart fixed it for ya. :D
Bounty Hunter Posted August 10, 2006 Posted August 10, 2006 I thought the MJ springs were further apart.
87manche Posted August 10, 2006 Posted August 10, 2006 I thought the MJ springs were further apart. I dopn't think so. Mj springs are under the frame rail, XJ springs are on the side of the unibody, outboard.
partsmj Posted August 10, 2006 Posted August 10, 2006 How about this? http://www.rocky-road.com/comanche.html Bolton Rear SOA setup. Rocky Road is the king of bolton SOA systems for any Jeep or other offroad vehicle. We bring this engineering expertise to the Comanche with our unique and bombproof bolton system. Our spring pads 'key' into your existing spring pads under the axle so you cannot mess up your driveline angles. Our SOA springpads are also extra long in design to help combat spring wrap. New Ubolt system and spring plates. No need to worry about salvaging those rusted old Ubolts. Our kit comes with a complete new axle bolt system for the rear SOA setup. I am thinking about this setup. Does anyone know anthing about this?
JOMJ87 Posted August 10, 2006 Posted August 10, 2006 I know its not much but the old perches are going to hang down and could cause clearance issues.IMO but thats not to say its a bad setup. I kinda like it its the same concept of the ubolt eliminators but its not helping clearance like they do. Cole
DirtyComanche Posted August 10, 2006 Posted August 10, 2006 I thought the MJ springs were further apart. Don't make me! Image Not Found Image Not Found We had this disscussion before!
Bounty Hunter Posted August 10, 2006 Posted August 10, 2006 Outside of spring hanger to outside of spring hanger MJ= 1208mm XJ= 1192mm What am I missing, your diagrams depict the MJ springs as being further apart, at least as far as I can tell.
DirtyComanche Posted August 10, 2006 Posted August 10, 2006 MJ is 1064mm centre/centre. The XJ works out to being about 11**mm centre/centre (you have to do math to figure it out and I'm too lazy right now. It works out to being about 1/4-3/8s wider on each side, IIRC.)
possum Posted August 10, 2006 Posted August 10, 2006 the 1966 through 1971 8 3/4 mopar rear ends work pretty well in these trucks. I am currently running an 8 3/4 out of a 1966 Dodge D100 1/2 ton I added an Auburn mini spool and 3:91 gears out of a 70 charger. A little bit of everything in true AMC fashion.
JOMJ87 Posted August 10, 2006 Posted August 10, 2006 the 1966 through 1971 8 3/4 mopar rear ends work pretty well in these trucks. I am currently running an 8 3/4 out of a 1966 Dodge D100 1/2 ton I added an Auburn mini spool and 3:91 gears out of a 70 charger. A little bit of everything in true AMC fashion. What is the width difference from stock if any? Cole
Bounty Hunter Posted August 11, 2006 Posted August 11, 2006 XJ 1032.48mmMJ 1064 mm centre to centre Come on, tell me I'm not losing my mind here.
DirtyComanche Posted August 12, 2006 Posted August 12, 2006 Now, on the Comanche you have a listed distance of 1208mm between the outsides of the spring pockets with a tolerance of 1.5mm. On the Cherokee it is listed as being 888.96mm from C to C of the framerails. Then, there's a farther 151.52mm on each side to account for the spring pocket. Thus, 2(151.52) + 888.96 = 1192mm. Meaning, there's only an 16mm difference in width. (I was wrong before) That is, however, pretty neglible. Seeing as how it's only about 5/8th of an inch between both sides. So, Bountyhunter, you were right, and I was too lazy to look up my old crap to confirm that. Anyways, no put bolting a wimpy XJ axle in anyways, so who cares.
Oizarod115 Posted August 12, 2006 Posted August 12, 2006 Anyways, no put bolting a wimpy XJ axle in anyways, so who cares. i care, cause itd be WAY to easy to direct swap in my XJ 44 :D but either way ive gotta change the perches so it really doesnt matter
pingpong Posted August 12, 2006 Posted August 12, 2006 Depending on the shackles you use, and the springs, it will cause it to look screwed up from the rear, if you don't relocate the spring perches
xjblue Posted August 14, 2006 Posted August 14, 2006 How about this?http://www.rocky-road.com/comanche.html Bolton Rear SOA setup. Rocky Road is the king of bolton SOA systems for any Jeep or other offroad vehicle. We bring this engineering expertise to the Comanche with our unique and bombproof bolton system. Our spring pads 'key' into your existing spring pads under the axle so you cannot mess up your driveline angles. Our SOA springpads are also extra long in design to help combat spring wrap. New Ubolt system and spring plates. No need to worry about salvaging those rusted old Ubolts. Our kit comes with a complete new axle bolt system for the rear SOA setup. I am thinking about this setup. Does anyone know anthing about this? Great for stock MJ D35 rear axles but little else... For this discussion they are talking axles from another vehicle in wich case that bolt on kit would not be desirable.
Bounty Hunter Posted August 14, 2006 Posted August 14, 2006 Sorry for splitting hairs, was just wanting some confirmation for my own sanity.
MJ88User Posted August 15, 2006 Posted August 15, 2006 Would replacing the D35 with the explorer setup be considered the most expedient replacement? From what I gather their is no bolt up options for the MJ and everyone seems to point to the explorer axle as the way to go for a quick and reasonable replacement. Is it the closest center to center for perches or is it just the least to hassle with when fabricating a replacement?
Pete M Posted August 15, 2006 Posted August 15, 2006 It's the stongest, most readily available axle out there that will closely match the front axle. They are all over the place, have disk brakes (96-02), common Jeep gear ratios, and a 5-on4.5" wheel bolt pattern. Every single non-MJ axle out there will require moving the perches.
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