ifixit8 Posted March 3, 2007 Author Share Posted March 3, 2007 man I am so angry :headpop: stupid jukyard didn't know what gears was on the cheokee that they were going to pull the rear end off of. so when they went to pull it they found out that they only had 3.55 gears!!! arg, oh well at least they found the right 3.07 gears at another yard and "should have them on monday or tuesday". good thing I'm on vacation and have another car to drive, an 04 hyundai tiburon. it just sucks driving that car in snow. oh well such is life. thanks for all the help and letting me vent about it. Link to comment Share on other sites More sharing options...
Pete M Posted March 4, 2007 Share Posted March 4, 2007 3.55 would be a good upgrade, but if you have 4wd you'd have to do the front too. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 4, 2007 Author Share Posted March 4, 2007 3.55 would be a good upgrade, but if you have 4wd you'd have to do the front too. yeah then i'd have to do the front too. The big problem is that the truck is at a friends house right now and doing the front along with the rear would just take more time then I have. his girlfriend is getting pissed as is, that the thing is at their house. :roll: Link to comment Share on other sites More sharing options...
ifixit8 Posted March 10, 2007 Author Share Posted March 10, 2007 good news. I picked up the rear end from the junk yard and it's off of another mj. now I just hope that it has the right gearing. And hopefully I will be putting it in tomorrow night. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted March 10, 2007 Share Posted March 10, 2007 wonderful! I was gonna contradict the "flipping the axle giving you more reverse theory"..but i just wised up and did the geometry, the specific reason that it would reverse is that by flipping the axle the differential would then be on the opposite side, and while the driveshaft would be spinning the same, where the diff would have been spinning towards the front of the car in forward gears before, it would now be spinning toward the rear of the car in forward gears. yay for math! haha, a few more years of college should wise me up a bit to not make dumb assumptions again! Link to comment Share on other sites More sharing options...
87manche Posted March 10, 2007 Share Posted March 10, 2007 good news. I picked up the rear end from the junk yard and it's off of another mj. now I just hope that it has the right gearing. And hopefully I will be putting it in tomorrow night. even if it doesn't, pt the axle in so you can move the truck, just don't put it in 4wd until you get the gear ratios matching again. TO be doubly safe, take the front driveshaft out, just in case someone drives your truck and decides to mess with the fun lever. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 11, 2007 Author Share Posted March 11, 2007 wonderful! I was gonna contradict the "flipping the axle giving you more reverse theory"..but i just wised up and did the geometry, the specific reason that it would reverse is that by flipping the axle the differential would then be on the opposite side, and while the driveshaft would be spinning the same, where the diff would have been spinning towards the front of the car in forward gears before, it would now be spinning toward the rear of the car in forward gears. yay for math! haha, a few more years of college should wise me up a bit to not make dumb assumptions again! that is why i didn't listen to the guy at the junk yard. I knew that he just wasn't thinking it fully through. it would be pretty funny though. just one speed for forward. :roll: we weren't able to get to it, because of other things. but the weather is suppost to be nice again tomorrow (sunday) so once again we might work on it. Link to comment Share on other sites More sharing options...
DirtyComanche Posted March 11, 2007 Share Posted March 11, 2007 They make reverse rotation engines to correct that. Or, if you run a rear engine, it'll work out... But, MOST axles have oiling problems when flipped, and will explode/seize after a while. I keep thinking about a set of flipped ford 9"s. It makes no sense in the end though. Link to comment Share on other sites More sharing options...
Pete M Posted March 11, 2007 Share Posted March 11, 2007 As long as those flipped 9s are currie or hi-9, then I would LOVE the extra ground clearance for my rear d-shaft. :D Link to comment Share on other sites More sharing options...
DirtyComanche Posted March 12, 2007 Share Posted March 12, 2007 The true hi-9 is mucho better than the currie unit. The currie unit uses a 8.8 R&P, and doesn't have a 3rd pinion bearing. Which is garbage. Well, as good as a ford 8.8... Hi-9s are like 4 grand! Or more... Link to comment Share on other sites More sharing options...
Pete M Posted March 12, 2007 Share Posted March 12, 2007 Don't I know it. The price approaches a high-pinion 60. But it weighs a lot less. :D Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 2007 well it turns out that the guys at the junk yard are even more stupid then i thought with just the comment of flipping the axle. Today my friends and I started on swaping out the rear ends. to only have to stop half-way through because the rear end they sold /gave me was the wrong gear ratio. :headpop: they couldn't even read the stupid tag on the thing that said 4/11 on one corner and 2.5 on the other!!!! at least they got it out of a comanche. but they said it was a 3.08. I am so pissed. and now i don't know what to do. it took them a few weeks just to come up with the rear end they gave me. also of course they have the "no cash refund" policy. I guss I will just call them up and b*@$£ them out. it should be interesting. maybe i could get them to give me the front and rear 3.55 axles they have out of a cherokee. but then that means getting a lift kit, welding, etc. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted March 12, 2007 Share Posted March 12, 2007 if not then just remove the front driveshaft and drive it as a 2wd if you need the wheels. that way there's no chance of accidently pullin in 4wd and f*king everything up. what does that gear ratio actually figure out to be? Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 2007 if not then just remove the front driveshaft and drive it as a 2wd if you need the wheels. that way there's no chance of accidently pullin in 4wd and f*king everything up. what does that gear ratio actually figure out to be? well i took that tag to mean that it was a 4.11 in a 2.5 4cylinder motor. and we had poped the cover to count only 36 teeth on the ring. thanks for the tip of not having the front driveshaft in so that I can drive the car, but the thing is that I want to be able to use the 4x4. I am lucky that I do have another car. it's just been a pain in the butt, and I needed to vent about it. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted March 12, 2007 Share Posted March 12, 2007 perfectly alright to vent here. I'd be pissed too. but at least it's from an mj. what was wrong with the original one again? Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 2007 perfectly alright to vent here. I'd be pissed too. but at least it's from an mj. what was wrong with the original one again? thanks for letting me vent. previous owner tore up the ring and pinion, ran it dry and romped on it. it would make a rattling noise and the truck wouldn't move. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 2007 the more that i think about this new rear end i wonder if it would still be the right one. my one friend counted 36 or 37 teeth to the ring, but he did not count the pinion. if my math is right the pinion should be a 12 tooth. which would make it to be 3.08333 ratio. so i could possibly still use it. I guess we will have to count it again. what was weird though, is that the brakes were different. like the drums and parts are smaller on the new axle. could anyone shed some light on this? Link to comment Share on other sites More sharing options...
Rokhound Posted March 12, 2007 Share Posted March 12, 2007 If you look on the gears it should have what gear are in it. If they are 4.11 then great you have upgrade. Now what I would do is call the damn junk yard and tell them that you want a 4.11 front axle to match the rear since there dumb a$$es can’t read and you want it at a he!! of a price like 50-100 and the upgrade the front and add a same kind of lift like 3-4 lift and be happy. If you do ask for a front end I would pop the diff. off in the lobby and would let the gear oil run all over the place check the gear and if there right I would then just leave mess and all as I walked out the door I would say thanks and have a nice. Just my thought but that is what I would do. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 12, 2007 Share Posted March 12, 2007 what was weird though, is that the brakes were different. like the drums and parts are smaller on the new axle. could anyone shed some light on this? Earlier D35 rear axles mostly used 10" drums. I think in 1990 or so Chryco changed to 9" drums. C-clip and non C-clip axles sometimes were different. D44's mostly had 10" drums, but some had 9". There were variants of these throughout the years, as there were with a lot of parts on our vehicles. Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 2007 what was weird though, is that the brakes were different. like the drums and parts are smaller on the new axle. could anyone shed some light on this? Earlier D35 rear axles mostly used 10" drums. I think in 1990 or so Chryco changed to 9" drums. C-clip and non C-clip axles sometimes were different. D44's mostly had 10" drums, but some had 9". There were variants of these throughout the years, as there were with a lot of parts on our vehicles. so more than likely it was out of a 90+ comanche. thanks for the info. I did call the idiot at the junk yard and told him what is going on. I guess he is personally going out to the yard and seeing what he can find. I told him that I wouldn't mind 3.55 gears out of the cherokee he has. that would just mean that I'd have to change out the front too and either lift the truck with a soa and kit, or move the spring perches. Link to comment Share on other sites More sharing options...
Pete M Posted March 12, 2007 Share Posted March 12, 2007 You DON'T need to lift or do anything is you upgrade to 3.55 gears. Your truck will simply be more fun to drive. :D Now, 4.10s, well they are a bit far from 3.07s, but still you don't need to upgrade else. Just do the swap and enjoy the newfound tire roasting power. Link to comment Share on other sites More sharing options...
87manche Posted March 12, 2007 Share Posted March 12, 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 :) Link to comment Share on other sites More sharing options...
ifixit8 Posted March 12, 2007 Author Share Posted March 12, 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 :) well i don't think that it will be to much of a problem. It's not like I am looking to have performance stopping, that's what the Tiburon is for ;) so I talked to the guy at the junk yard this afternoon and he is going to pull the 3.55 front & rear drive axles for me. so now I just have to come up with the money for a lift, or just spend more time changing out the gears. I haven't decieded yet. Link to comment Share on other sites More sharing options...
Pete M Posted March 13, 2007 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. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 13, 2007 Share Posted March 13, 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. Link to comment Share on other sites More sharing options...
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