Mudrig150 Posted December 6, 2022 Share Posted December 6, 2022 Now that I have some money rolling in I'm gonna start working on the mechanical aspects of my truck. The first thing I wanna tackle is swapping the 8.25 out of my 91 XJ into my 88, as the 35 in the MJ is completely shot. The problem is, the 8.25 is shot too, but only in terms of seals. It needs all new brakes and seals, as the drums are horrendously worn, the brakes don't even work, and the wheel cylinders and axle seals dump out fluid. I am gonna be ordering new floor pans and starting with chopping up the parts Jeep to get some donor bits of frame rails and the trans tunnel, and I am also gonna be grabbing some other stuff. Where is a good place to get brakes and seals, and what all goes into an axle swap between an XJ and MJ other than the spring perches? I am seeing a distinct lack of specification about which axle a lot of the parts go to, generally just saying they go to Jeeps... Link to comment Share on other sites More sharing options...
Mudrig150 Posted December 7, 2022 Author Share Posted December 7, 2022 Are these the correct brakes? It doesn't specify if it's for an 8.25 or a Dana 35. Link to comment Share on other sites More sharing options...
Mudrig150 Posted December 7, 2022 Author Share Posted December 7, 2022 CENTRIC KIT499D Drum Kit Rear; w/o Anti-lock Brakes; 9" Rear Drum It seems right, my rear axle seems to have the that size drums and doesn't have antilock brakes... Link to comment Share on other sites More sharing options...
ghetdjc320 Posted December 7, 2022 Share Posted December 7, 2022 Not sure what gear ratio you’re running but you may be money ahead getting a junkyard KJ 8.25 which will have larger 29 spline axle shafts and disk brakes in most years. Just a thought since an axle swap from an XJ isn’t bolt in anyways. Link to comment Share on other sites More sharing options...
Mudrig150 Posted December 7, 2022 Author Share Posted December 7, 2022 30 minutes ago, ghetdjc320 said: Not sure what gear ratio you’re running but you may be money ahead getting a junkyard KJ 8.25 which will have larger 29 spline axle shafts and disk brakes in most years. Just a thought since an axle swap from an XJ isn’t bolt in anyways. Don't have a junkyard around here, and the one junkyard we did have didn't have any KJs... I know the XJ axle isn't bolt in, I know I have to modify the spring perches, but I'd rather modify an axle I already have than spend $800 on a rusty junkyard axle from craigslist or marketplace. The ratio in the truck currently should be 4.10, and if my calculations were right the XJ has 3.73 gears. I don't need a crawler axle, I just need something to daily the truck, as the current axle is very... grindy. It's near death, that's for sure. Link to comment Share on other sites More sharing options...
ghetdjc320 Posted December 7, 2022 Share Posted December 7, 2022 11 minutes ago, Mudrig150 said: Don't have a junkyard around here, and the one junkyard we did have didn't have any KJs... I know the XJ axle isn't bolt in, I know I have to modify the spring perches, but I'd rather modify an axle I already have than spend $800 on a rusty junkyard axle from craigslist or marketplace. The ratio in the truck currently should be 4.10, and if my calculations were right the XJ has 3.73 gears. I don't need a crawler axle, I just need something to daily the truck, as the current axle is very... grindy. It's near death, that's for sure. Are you going to regear the front to 3.73 or the rear to 4.10? Link to comment Share on other sites More sharing options...
Mudrig150 Posted December 7, 2022 Author Share Posted December 7, 2022 7 minutes ago, ghetdjc320 said: Are you going to regear the front to 3.73 or the rear to 4.10? Gonna swap just the rear in for now and leave the 2WD front under the MJ until I can get the front Dana 30 rebuilt from the XJ, and run 3.73 front and rear. Link to comment Share on other sites More sharing options...
cruiser54 Posted December 7, 2022 Share Posted December 7, 2022 Perfect time to convert to rear discs using 94 to 98 Grand Cherokee parts. Link to comment Share on other sites More sharing options...
Mudrig150 Posted December 8, 2022 Author Share Posted December 8, 2022 13 hours ago, cruiser54 said: Perfect time to convert to rear discs using 94 to 98 Grand Cherokee parts. I've got things that need tackling more that my money is gonna be going into... Link to comment Share on other sites More sharing options...
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