ifixit8 Posted March 13, 2007 Author Share Posted March 13, 2007 You mean changing out the axles right? You can't simply swap in gears without setting them up, and junkyard gears don't always take well to being re-setup. i figured on changing the axles. one of my friends says to change the gears. my thoughts are just like yours that it would be a pain to set-up old gears. and plus i just don't feel like messing with that. So the next thing is, will i run into any problems with the front end swap? I know if I was to stay at stock hight for the rear I'd have to move the spring perches. Link to comment Share on other sites More sharing options...
Pete M Posted March 13, 2007 Share Posted March 13, 2007 You have to move the spring perches no matter what you do. XJ perches will not work under an MJ, even if you go SOA. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 13, 2007 Author Share Posted March 13, 2007 You have to move the spring perches no matter what you do. XJ perches will not work under an MJ, even if you go SOA. yay, this will be fun. :roll: so what about the front? Link to comment Share on other sites More sharing options...
feerocknok Posted March 13, 2007 Share Posted March 13, 2007 You have to move the spring perches no matter what you do. XJ perches will not work under an MJ, even if you go SOA. yay, this will be fun. :roll: so what about the front? Bolt in affair. I believe front brakes have changed through the years though, so you may have to use the calipers off the new axle. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 14, 2007 Author Share Posted March 14, 2007 You have to move the spring perches no matter what you do. XJ perches will not work under an MJ, even if you go SOA. yay, this will be fun. :roll: so what about the front? Bolt in affair. I believe front brakes have changed through the years though, so you may have to use the calipers off the new axle. well it's good to know that the front shouldn't be to bad. do you still think that the calipers will be different from 88 to 89? and from an xj to an mj? Link to comment Share on other sites More sharing options...
87manche Posted March 14, 2007 Share Posted March 14, 2007 just to add tot he brake dilemma. most MJ's got 10" drums, most XJ's got 9". Cause we're trucks, and they were meant to get groceries :) All the 91 and 92 HO MJ's I've seen (w/o the HD Towing option) had 9" drums, both the 2WD and 4WD. 'Course, I haven't seen them all :D My 91 had 9" drums until I crapcanned them for disks. perhaps that was only during the AMC years. All the MJ's around here have 10" drums, d35 or not, but I know of 2 86's, one 87 and my own in that group. That's what I get for making assumptions, damned chryco. Link to comment Share on other sites More sharing options...
feerocknok Posted March 14, 2007 Share Posted March 14, 2007 You have to move the spring perches no matter what you do. XJ perches will not work under an MJ, even if you go SOA. yay, this will be fun. :roll: so what about the front? Bolt in affair. I believe front brakes have changed through the years though, so you may have to use the calipers off the new axle. well it's good to know that the front shouldn't be to bad. do you still think that the calipers will be different from 88 to 89? and from an xj to an mj? Schuck's Auto Supply says: '88 Caliper, Part No. 154181 '89 Caliper, Part No. 154181 I forgot to add about the vacuum disconnect for the 4wd. '91+ Cherokees and Comanches will not have the vacuum disconnect. I believe you'd just have to plug a couple things on your t-case, and you can use those axles as well. Link to comment Share on other sites More sharing options...
Pete M Posted March 14, 2007 Share Posted March 14, 2007 CADs were available through 92 and car-part shows them as a choice through 93. ALL MJs came with the CAD except for a handful of 86s with the fulltime case (although something in the back of my head says someone said they too had a CAD). Link to comment Share on other sites More sharing options...
feerocknok Posted March 14, 2007 Share Posted March 14, 2007 CADs were available through 92 and car-part shows them as a choice through 93. ALL MJs came with the CAD except for a handful of 86s with the fulltime case (although something in the back of my head says someone said they too had a CAD). :oops: Thought I had my facts straight. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 14, 2007 Author Share Posted March 14, 2007 CADs were available through 92 and car-part shows them as a choice through 93. ALL MJs came with the CAD except for a handful of 86s with the fulltime case (although something in the back of my head says someone said they too had a CAD). ok, i have a stupid question, what does CAD stand for? Link to comment Share on other sites More sharing options...
Pete M Posted March 14, 2007 Share Posted March 14, 2007 Central Axle Disconnect. It's the vacuum actuated device on the front axle that locks the passenger side shaft halves together. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 14, 2007 Author Share Posted March 14, 2007 Central Axle Disconnect. It's the vacuum actuated device on the front axle that locks the passenger side shaft halves together. I feel really stupid, i should have known that. thanks though. Link to comment Share on other sites More sharing options...
Grasshousewater Posted March 15, 2007 Share Posted March 15, 2007 My rear totally blew out like a month ago. The posi clutch dicks broke apart and luckily only destroyed my pinion and ring gears. My 44 axles were still in "like new condition"(thats what my tech at the rear end shop told me) In the end i replaced everything but the outer housing and my two axles. $582, but now i have a totally new rear end with new seals and good fluid. If you have an older Mj, don't use a synthetic gear lube unless you have a professional say otherwise. the seals and gears in most mj's can't handle synthetic lubes. You will also most defiantly need a Rear end additive to mix with your lube; these additives are very important and not using any will really cause some problems. Link to comment Share on other sites More sharing options...
DirtyComanche Posted March 15, 2007 Share Posted March 15, 2007 I've never heard of running synth on old seals or gears being a problem. If anything it'll swell the seals a bit. But what do I know, I only did it once (then never did again because $50 to change the oil in your rear end is BS). And the only additives you should ever need is if you have a clutch type LSD. Like the factory trac-lok. Then it's just a generic LSD additive. Most gear oil will even come with it already in it. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 16, 2007 Author Share Posted March 16, 2007 well today a friend and I picked up the cherokee axles. so the next available day we are going to swap everything. should be a fun time. so now we have to cutoff the spring perches and reweld them. I'm gonna have to buy a protractor to get the right angle. I'll keep everyone posted on this project. Link to comment Share on other sites More sharing options...
carnuck Posted March 20, 2007 Share Posted March 20, 2007 There's probably a bunch of people that would swap you a matching 3.07 diff for the one that is 4.10! It'll be 9 pinion teeth to 36 ring teeth. The number will be stamped into the edge of the ring gear too. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 20, 2007 Author Share Posted March 20, 2007 There's probably a bunch of people that would swap you a matching 3.07 diff for the one that is 4.10! It'll be 9 pinion teeth to 36 ring teeth. The number will be stamped into the edge of the ring gear too. well thanks for the idea, but i had to take the 4.10 back to get the cherokee axles. It's just going to take more time now, but that's ok. It will be nice to have the 3.55 gearing. Driving the mj will then be like my wifes 99 xj that we used to have. Link to comment Share on other sites More sharing options...
Rokhound Posted March 20, 2007 Share Posted March 20, 2007 if your not so far a way i have a 3.07 that you could have for 50 that came out from under my my when i upgraded to 3.55 and the 8.8 Watson Link to comment Share on other sites More sharing options...
mjeff87 Posted March 20, 2007 Share Posted March 20, 2007 I have a 3.07 MJ D44 too, wasn't planning to sell it, but if you're interested PM me. Jeff Link to comment Share on other sites More sharing options...
ifixit8 Posted March 20, 2007 Author Share Posted March 20, 2007 thanks for the offers guys, but it would cost me more in gas than it's worth. I will be fine with the cherokee axles. plus it gives me a reason to lift the thing Link to comment Share on other sites More sharing options...
Rokhound Posted March 20, 2007 Share Posted March 20, 2007 thanks for the offers guys, but it would cost me more in gas than it's worth. I will be fine with the cherokee axles. plus it gives me a reason to lift the thing that well work nothing better than a lift MJ or lower one if your into that i guess :nuts: Link to comment Share on other sites More sharing options...
ifixit8 Posted March 20, 2007 Author Share Posted March 20, 2007 no lowering, that is so stupid especially since it's a 4wd. lifting it is, just need the $$$ for the front springs and shocks. Link to comment Share on other sites More sharing options...
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