JeepMJ90 Posted December 16, 2017 Share Posted December 16, 2017 This is my old 1990 MJ. It's seen better days and is in need of a lot of attention. The rear axle needs to be replaced with something stronger, so I can start driving it again. 1990 MJ 4x4 4.0 L 5 speed Lift Kit Front axle replaced with non-disconnect axle from salvage yard Warn front hub kit Fenderwells trimmed and flares added Homemade front and rear bumbers (NEED Paint!) SYE added Rear axle keeps breaking pinion gears (Hope to change to Dana 44) Homebuilt aluminum rack Link to comment Share on other sites More sharing options...
jeeppapa Posted December 16, 2017 Share Posted December 16, 2017 This is my old 1990 MJ. It's seen better days and is in need of a lot of attention. The rear axle needs to be replaced with something stronger, so I can start driving it again. 1990 MJ 4x4 4.0 L 5 speed Lift Kit Front axle replaced with non-disconnect axle from salvage yard Warn front hub kit Fenderwells trimmed and flares added Homemade front and rear bumbers (NEED Paint!) SYE added Rear axle keeps breaking pinion gears (Hope to change to Dana 44) Homebuilt aluminum rack What ya going to do with it? Any future plans?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
90BlackMJ Posted December 17, 2017 Share Posted December 17, 2017 Looks like a nice solid truck from what I can see. Link to comment Share on other sites More sharing options...
JeepMJ90 Posted December 18, 2017 Author Share Posted December 18, 2017 Thanks guys! I hope to have it back on the road soon. I have broken three pinion gears in stock rear axles. With 4.10 gearing, the pinion shaft in the gear area is just too small to handle the stress of even mild off road use. So, I am currently looking for a stronger rear axle in the central Florida area and hope to find something that already has 4.10 gears to match the front axle ratio. I have notice that most newer axles have disc brakes and that would require additional changes to the master cylinder and maybe the front and rear proportioning valves. So I am researching what model axle would be the easiest to swap. Any axle suggestions or leads on axles in Florida would be greatly appreciated! I know that the driveshaft will require modification also. Thanks again for responding to my first post and your kind words! Link to comment Share on other sites More sharing options...
Dzimm Posted December 19, 2017 Share Posted December 19, 2017 You're gonna have a hard time finding an axle that is already 4.10 and fits under the MJ unless it's coming off someone else's build. The easiest axle to obtain would be a C8.25 from a newer XJ, the only modification required is welding on new spring perches in the correct location. Then gear it to 4.10 and stick it under the truck (not sure if these ever came with 4.10s from the factory). It's only slightly weaker than a Dana 44 and still has tons of aftermarket support. Doing this you also have the option to do a disk brake conversion using parts from a Jeep Liberty KJ. Those have a C8.25 under them with disks that swap directly to the XJ one. Link to comment Share on other sites More sharing options...
Skorpyo Posted December 19, 2017 Share Posted December 19, 2017 IF you're up to the challenge (grinding, welding etc) a Ford 8.8 out of an explorer can be had with factory 4.10 gears, though they too can be tough to come across. They're supposed to be as strong as a D44 (debate may ensue) and are, in my opinion, more readily available than XJ axles. They would also give you disc brakes. I swapped in an 8.8 with 3.73s with an LSD and discs that I picked up for a pretty good price from a local JY. Link to comment Share on other sites More sharing options...
outlaw star Posted December 25, 2017 Share Posted December 25, 2017 I'm in West Palm Beach and have a 4.10 geared MJ D35 if you want it. Sent from my SM-J700P using Tapatalk Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 25, 2017 Share Posted December 25, 2017 The man said he's breaking axles with his current 4.10 D35 - why would he buy another one? It took me two years to find an MJ D44 (3.55) and it would take two more years (if ever) to find a MJ D44 4.10 axle as there were very few. As above, find a 4.10 8.8 or even a 8.25 as both are much stronger than the D35. D44's from an Isuzu, Honda Passport or similar are also fairly plentiful and will work. Lots of them with the 4.10 gears already too. One with disk brakes is a positive and lots of guys are using the stock MJ master / booster and distribution block with them. Link to comment Share on other sites More sharing options...
outlaw star Posted December 25, 2017 Share Posted December 25, 2017 The man said he's breaking axles with his current 4.10 D35 - why would he buy another one? It took me two years to find an MJ D44 (3.55) and it would take two more years (if ever) to find a MJ D44 4.10 axle as there were very few. As above, find a 4.10 8.8 or even a 8.25 as both are much stronger than the D35. D44's from an Isuzu, Honda Passport or similar are also fairly plentiful and will work. Lots of them with the 4.10 gears already too. One with disk brakes is a positive and lots of guys are using the stock MJ master / booster and distribution block with them. I don't want to sell it, it's free and will get it moving. Plus I have no use for it. Sent from my SM-J700P using Tapatalk Link to comment Share on other sites More sharing options...
Lthompson741 Posted January 23, 2018 Share Posted January 23, 2018 I like it. That is pretty much how mine started out. I like seeing them come back to life. Link to comment Share on other sites More sharing options...
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