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The plastic tank on my 96 XJ master cylinder needs to be replaced. Replacement reservoirs available from both Mopar and aftermarket. Has anyone done this? Can you pop it off (after removing the brake fluid of course) w/o bleeding the system afterward? I'm thinking yes, since the master cylinder...

New Mopar Harmonic Balancer & Oil Slinger Question I need to replace my harmonic balancer on my 91 MJ and have a new Mopar HB I will be using. This is the one that comes with the instruction sheet that states "remove the oil slinger and discard". I'm assuming this means the new balancer is...

Moved to OEM Tech..........

I have searched with no luck. I have a 91 MJ with a Hesco 4.6L stroker, OBD1 system. I recently installed a new bored 62mm throttle body and it runs well. The new throttle body has the vacuum port and mounting holes for the MAP sensor on the left side, but I capped the port off and am using the...

Can anyone provide some insight as to the best way to pull and replace the vertical air vents circled in red in the below picture? I don't want to break anything. Thanks guys.

ZJ V8 Draglink Fitment for XJ/MJ I have a bit of play in my 91 MJ where the drag link connects to the right side hub. I've gradually replaced all the original steering gear linkage (except for the drag link) with all new stuff for the ZJ V8 models as it's beefier and bolts on to XJs/MJs w. no...

My rig is a 2WD 1991 Comanche MJ. It has an 88 rear MJ D44 under it using the original TrakLoc lower ratio carrier and a 4.11 ratio "thick" R&P gear set. I want to regear to a 3.73 R&P ratio. The carrier cutoff I believe is 3.73. What I'm asking is do I need the "thick" gearset or the standard...

Every once in awhile I check for fault codes on my 91 OBDI MJ using the ON/OF key. There have never been any, until today. I got a 12 (Battery or power to the ECM disconnected in the last 50 key cycles), 14 (MAP sensor voltage too high or low. Check circuit and sensor), 34 (Fault in cruise...

The vehicle is a 91 Comanche, 4.6L Hesco stroker w. the AW4. The AW4 coolant return line is plumbed through the stock factory cooler (like below) then through the built-in radiator tranny cooler. Today while cruising around town, coolant line quick-connector popped off the lower radiator port...

Going to replace the pinion yoke and leaking seal with the u-bolt style yoke, and just want to be sure on the seal placement. Is the correct orientation side A (with the stampings) to the outside or side B? This seal looks a bit different than the one on the axle now. Pretty sure it's side A to...

Alloy USA makes an D44 axle kit listed for the 97-06 Jeep TJ applications, p/n 12135. I called Alloy USA tech support to ask if these axles would work in the older factory XJ/MJ D44s as I have a bent axle in my 89 MJ D44. The Tech Support guy was not the most knowledgeable person I've ever...

After snapping two rear axles on my D35 MJ rear I finally located an MJ D44 for my Comanche and it's in the shop getting regeared from 3.54 to 4.09. I knew that would require a a different carrier. I had what I thought was a 3.93+ Trac-Loc carrier that I supplied along w. a new Dana 4.09 R&P...

Has anyone done this? The mounting ears on the 4WD are solid pieces and replacing the bushings on these is a straightforward press job or even heat and beat. :D But on the 2WD axle, they are not solid; there are two sheet metal ears on ech side. The FSM calls for a special bearing press that...

I installed WJ lower control arms on my MJ awhile back and I really like the improvement in handling. I'd also like to try the WJ uppers too. They are the same eye-to-eye length as the MJ/XJ stock upper arms, but are stouter and a similar bend in them like the WJ lowers. Has anyone tried using...

Problem: My right front disk brake on my 2WD MJ (120K miles) started squeeling every morning for about a block, then stopped for the rest of the day. It started about a year ago, so I replaced the front calipers, rotors, brake lines, wheel bearings, and pads. All parts were new Wagner brand, and...

Just thought I'd throw this out here. Installed a new Reflexxion cowl hood and when opened all the way it hits the right wiper post/arm. Note the missing wiper arm. Anyone figue a way to prevent this other than surgery on the hood?

I am still plaqued with a squeaking brake on the right front. I got a set of new pads and put them on the right front wheel, and after I got the caliper bolted back on I couldn't rotate the rotor. If I back off the bottom caliper bolt slightly, the rotor will turn as usual, slightly rubbing on...

The aux fan motor burned up in my rig (91 MJ, 4.0 engine). I have a replacement electric motor, but am having big problems removing the fan blade. I have removed the retaining clip and the plate underneath it, but the blade won't budge from the old motor shaft. Any tips on getting it off w/o...

91 Comanche, open cooling system Just went under the hood to check something and noticed the upper radiator hose was completely collapsed. The truck had been sitting for about six hours, and had no overheading problems when driving this morning. Popped the rad cap, heard some pressure escape...

The insulator or heat shield that sits on top of the intake manifold shown below is OEM equipment for every 1999 and above Jeep XJ, TJ, WJ, etc. w. the 4.0. Mine has disintegrated, and even the dealer can not locate a part number for a replacement. Does anyone know where I can get one? Thanks!