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Hi, Is there an ignition-switched +12 lead somewhere underhood on a '90 4.0? I'm wiring in an aux cooling fan underhood, and looking for something I can use to trigger it on only when the ignition is on. I'd like to avoid trying to wire to the interior fuse box as the "empty grommets in the...

I bought a Borgeson shaft some time ago for a '90 XJ (non-tilt), and finally got around to installing it. The part number I have is 000893, which Borgeson confirmed was correct. Per their notes, my steering column requires a "double D" shaft :) (essentially, a "squashed" circle, with two...

I've got a '90 XJ with an AX15. It's set up pretty much exactly as I want, so I don't really want to replace it. However, my wife will need to start driving it in order to haul some gear, and the clutch too heavy for her to handle. I'm thinking of swapping in an auto so she can drive it. I...

Third time was not the charm for me... Do any of you guys have any ideas or tricks to get it through DEQ and tagged? It's a '90 4.0/AX-15, roughly 180k. Runs great and idles smoothly, but has a bunch of blowby (blowing oil out the filler plug). All the emissions harness, etc. are there and...

Is it possible to swap an HO head onto a Renix motor, keeping all the Renix injection and ancillaries? I have a '90 4.0 with a Borla header which I would really like to keep. I'd like to swap on an HO head. From what I was able to find, it looks like the Renix intake and exhaust will be able...

For my '90 stroker build, I want to swap in HO head and have it work with the Renix controls. I found a good deal on a 0630 head, but my understanding is that it is missing a port for the temp coolant sensor. Is it possible to tap my own temp sensor port, or am I better off waiting and looking...

My '90 XJ has about 180k on it, and about 30 degrees of slop in the steering wheel. The balljoints/tierods/draglink/etc. were all replaced within the last 20k miles with NAPA premium parts; the only original parts are the steering box and column (non-tilt). The slop didn't used to bother me...

I need to swap my driveshaft due to a length issue. The ideal solution would be getting a SYE, so I'm poking around looking for a used tcase I can modify and drop in. How do you go about testing/inspecting a used transfer case if it's already been pulled, or is from a non-running rig? I...

I have an AX15/231/D35 combo on about 4" of lift. With that combo, the slip yoke was pretty far out of the case; I think the shop said there was about 1.5" of engagement, and that it was okay. I just swapped in an 8.25 axle, thinking the longer snout would push the yoke back into a safer range...

This is probably really a basic shop question, but I'm thinking it may have something to do with the parts swap. Basic system is a '90 w/o ABS. Over time, I've swapped the front lines with SS, the rear line with SS, replaced calipers/wheel cylinders with no issues. A couple of years ago, I...

I'm in the midst of installing a powertrax no-slip into the 8.25 I recently picked up. I read the old threads about it before I even bought the no-slip, so I was pretty aware of the issues people had with installing them. I, of course, ran into some new ones... :) Everything actually went...

I recently blew up a D35 and plan to swap in an 8.25 axle which I will pick up at the local boneyard; I believe this will be a pretty straightforward swap. I want to make sure I have any needed little bits before I start. I believe the following will interchange: soft brake line ebrake line...

I've got a '90 5spd/231. I'm about to replace a (ready to explode) D35 with an open 29 spline 8.25. Before it goes in, I'm thinking of adding a locker or lsd. This rig is a daily driver. In the mornings, I need to drive ~15 miles over some twisty backroads to drop my kids off, and then...

I recently picked up a used rear axle (8.25) from the scrap yard. I pulled it apart to replace the axle seals, and saw that there was a lot of surface rust on the inside of one of the axle tubes and on the corresponding driveshaft. I'm fairly sure this was from the way the axle was sitting in...

Hi all, I retrofit an a/c system into my '90 XJ last year; I grabbed the system from a '89, so it went in pretty well. I was mucking with the wiring for the door locks over the weekend and pulled back the carpeting to trace it. The carpet padding on the passenger side was soaked. I thought...

So how negotiable are salvage yard prices? I'm looknig for some parts, and the yards seem very proud of what they've got, based on what they are asking... I suck at bargaining, so try to avoid it, but these days, I gotta do it...

XJ: '90 2 door, 4.0, AX-15, 231, slip-yoke driveshaft, 32's, Tomken 4" lift with 3" shackles; probably 4" total lift after sagging (5 yrs old). WJ brake master/booster upgrade My D35 sounds like it is ready to give up the ghost. The thrumming sound it makes under load is getting louder, and...

Jeep info: 1990 XJ, 4.0L, AX-15, D35 w/lsd, 180K. 3" Tomken lift with stock driveline. My XJ has recently developed a thrumming/throbbing noise from the rear end. It's a "whump-whump-whump" that is periodic, and which starts once the XJ is above 30mph or so. There's no vibration that I can...

I have a '90 4.0 with about 180k on it. It runs well other than some lifter noise when the engine is cold. It had a number of oil leaks which I've been chasing down. I took care of the main ones (rear main seal, valve cover gasket) and degreased the engine to track down the remaining leaks...

I've got a '90 2dr stripper model, and have been slowly adding bits and pieces to it. The other day, I picked up a factory soundbar and lighted visors off CL; the seller said they were from a '94 4 door. Can someone tell me where exactly the soundbar was originally mounted (a pic would be...