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89, I6, a/t Not getting 2nd gear or T/Q lockup. I can override C14 and C15 to force 2nd gear and T/Q lockup, so I know the trans works. New TPS started the 2nd gear issue, before that T/Q was not locking. Now both problems. Swapped TCU today, no change, in fact can disconnect the TCU and...

Noticed the motor sounding strange, a little louder and seemed to miss the shift to OD. Then the trans temp rising. Hmmm. Manually select TC lock and it locks, rpm decrease, temps decrease. Couple days of observation shows that sometimes it runs normally. Then sometimes it wont lock (even...

Since the posi-lock was a $500 waste of time I am back to the vacume system. Suffice to say the other common choices are not worth the trade off (solid axle, late model d30, hub locks). I am looking to make sure the vacume system is as reliable as possible (upgrade/harden lines, carry spare...

89, 4.0 Renix, Auto Looking at another XJ recently (97 I think) I noticed that the thermo housing had a temp sensor installed at the right (driver) side. Is this OEM for later models? I seem to recall something about corvette thermostats but not the details. If OEM, will it fit my motor? If...

With the control lever in Vent; While driving maybe 40-60 mph, part throttle or accelerating, the air output stops coming from the vents and starts coming from the defrost/windshield. Then, when lifting off throttle it shifts back to the vents. I'm thinking some sort of vacume problem?

Need to upgrade (increase diameter/stiffness) the rear swaybar due to roof loads. Has anybody ever done or heard of this being done? Where to locate a new bar or upgrade present bar? I thought of welding on a tube around existing but that wont work due to bends (and it would transfer the load...

My jeep already has an electrical system installed, so I am leaning towards one of the electric lockers in the F8.8. Any direct knowledge of performance/durability differences between the Ected and the Elocker? I am also wondering whether the Ected LSD is better than the Elocker open diff (in...

I am having a problem with the motor at intermittant/random times. Its been doing it for a couple years, but rarely(once or twice monthly). Its becoming more frequent (every 5-10 minutes) Under load or cruise the engine seems to hiccup very harshly. It almost feels like its completely...

I installed a new gas tank (32gal) which uses one of the two OEM vents. It seems the generate significant overpressure (positive). Sometimes can hear the tank "pop" as it expands and when opening the cap it vents out air alot. Also, after driving, if you walk within 20' of the vehicle it...

Does anybody know the name applied to a coffee-can type fuel filter that you insert into the filler neck and then pump fuel into while filling the tank? It has mexican applications and is associated with RVs. I read about them months ago , looked it up and located on an RV parts site. Cannot...

Looking at 8.8s and there are some differences that I havent been able to clarify via search. Seems they come in two year groups; 95-01 and 02-up. Whats the difference and which is better? They also spec 6 cyl or 8 cyl. Again, whats the difference? Did all years have rear discs or were some...

Whilst changing to big brakes (front) I removed the hub bearing and then removed the axle shaft to improved access. The left side went fine. While removing the right side it immediately began to flow gear oil. Replaced immediately to stop the flow. Then had to quickly remove, do work and...

Installed new "long-range" fuel tank (32 gal). Have been noticing that upon removal of the filler cap there is alot of air pressure, way more than ever before. Sometimes I hear the tank pop out. The tank has one of the two OEM vents installed. I dont know if these are one-way vents or...

Went for a drive this past weekend and a few miles from civilization was coasting along the path, very slow, no throttle, in 3 (auto) when the dash lights came on, engine died. Cranked fine but no start. Most recent mod was a "long range" fuel tank. Uncomfortable about fuel pump changes but...

Currently running OEM 15x8, 5.25BS(?), 5x4.5 steel wheels, 31x10.5 tires with 3-4" lift. Considering new wheels as follows; 16x7.5, 5.79BS, 5x5.118, offset 1.457, hub bore 3.337. I dont know OEM offset or hub bore. Bore appears to ba about 2.88". Also not sure about how OEM wheels are...

First off, what is the rubber block with four bolts, which the trans crossbrace bolts to called? A transmission mount? A transmission support? TNT belly pan causes transmission/xfer case to bang into each other. I may need to shim the trans up higher? Or replace the rubber mount? If...

Warning Folks; 89 4.0/AT; I was led to believe by many that the Banks 91+ header will "fit" on a pre-HO engine, the only difference being the O2 sensor. Even the salesman at Banks, while not admitting it would work, did agree that the only difference was the O2 bung. It will NOT fit, period...

89 4.0 with cracked manifold. I was led to believe that the Banks HO (91+) header will fit the pre-HO motor, the only difference being the O2 sensor bung, which can be plugged. Just recieved the header and there is no O2 bung. Before tearing into this, have I been misled? Will this header...

Need to rebuild fronts and would prefer to upgrade if possible. Been lookin at past threads but mosly Rear drum to disc upgrades and none-too-specific on the details. 89XJ, stock D30 front axle, upgraded to 96 dual booster, 31s, stock 15" wheels. There was some talk of ford or chevy calipers...