New expedition XJ for me (pics)

OverlandZJ

Expedition Leader
dieck said:
Thanks. Anybody have a picture of this? I'm having a hard time understanding where this is... :)

Here ya go, note the dimple at end of screwdriver.

willys002.jpg
 

dieck

Adventurer
John B said:
Here ya go, note the dimple at end of screwdriver.

willys002.jpg

Wow, thanks for the quick picture. So if I have a needle I just depress this to get the grease in? Zerks are intuitive for me, but this not so much.
 

OverlandZJ

Expedition Leader
Yes, if it's dirty like my spare hit it with some WD40 and a small brush to clean it up. If it doesnt want to take grease, lightly tap a punch to loosen the ball? at the top.

That ball socket is often overlooked in a double cardan shaft and can dry out and cause a vibe and noise.
 

OverlandZJ

Expedition Leader
John90XJ said:
My understanding is that not all of the Double Cardan joints have a center section grease fitting.

Hmmm...wasnt aware of that, thanks for posting that. Any idea what did or did not have the fitting?

The shaft pictured is an original Mopar front XJ shaft. I'll have to check my newer Woods shaft.
 

John90XJ

Adventurer
John B said:
Hmmm...wasnt aware of that, thanks for posting that. Any idea what did or did not have the fitting?

The shaft pictured is an original Mopar front XJ shaft. I'll have to check my newer Woods shaft.

I really don't know.....talking to my favorite mechanic online right now and he's not sure either. We just know more often than not they don't have a zerk or needle fitting.

I must admit I don't know if you can inject with a needle AND not have a fitting, like twist to one side and shoot it into the exposed area.

To be honest, I've never had an issue with mine.
 

dieck

Adventurer
Status update. I fiinished most of the 60k service, doing it myself this time to learn the truck better. I was pleased with how easy it was to change the oil and filter. After getting the sparkplug rail off which was a PITA, the plugs were very easy to change. Changing the belt was a cinch too. I touched up the alignment again to very slightly adjust the toe in, and am overall very pleased with how simple and easy to work on the jeep is with just a few hand tools. The best tweak by far tho is that I added 2 deg shims on the rear axel to straiten out the rear drive shaft. I was getting nasty vibe past 65mph even with the SYE and this completely eliminated it all the way up to 90mph (which was scary, I won't be doing that again on 33's). I was amazed at what a difference 2 degrees makes tho.

One quick question if you are still reading. The front of my rear D35 axel has developed a leak where the rear drive shaft attaches. I'm assuming this was caused by the drive shaft vib. Any bets on if this will stop leaking now that I've fixed the vib, or do I need to go in and replace the seal?
 

dieck

Adventurer
Also, I have a tru-trac in the rear D35. I've heard conflicting advice on if this needs any friction modifiers or special lubes. I thought that it had no clutches and was all mechanical, which would lead me to believe that it requires nothing special. But just about everyone I talk to swears it requires some nasty smelling stuff.
 

John90XJ

Adventurer
dieck said:
Also, I have a tru-trac in the rear D35. I've heard conflicting advice on if this needs any friction modifiers or special lubes. I thought that it had no clutches and was all mechanical, which would lead me to believe that it requires nothing special. But just about everyone I talk to swears it requires some nasty smelling stuff.

Replace the pinion seal. It's not hard and the problem won't get better until you do it. Make sure you have an airgun capable of getting the pinion nut re-torqued.

EDIT: I just read the factory service manual for both the D35 and the Chrysler 8.25 and they give a fair amount of detail about measuring bearing preload and how to get it set back to spec once you've replaced the seal. If you would like the details straight from the FSM, let me know and I'll email them to you in a .PDF. FWIW, we usually just rattle them back on until it "feels" right and not worry about it. When I pulled my D35 apart after about 200k miles, it looked fine and the gears were then sold off to someone else.

You don't need friction modifier in a gear driven LSD. Just use the recommended gear oil. The FSM says to use 75-90 for normal operations, 80-140 synthetic for trailer towing. Here is the Eaton manual: http://www.eatonperformance.com/PDFs/TrutracOwner-1.pdf
 
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dieck

Adventurer
John90XJ said:
Replace the pinion seal. It's not hard and the problem won't get better until you do it. Make sure you have an airgun capable of getting the pinion nut re-torqued.

EDIT: I just read the factory service manual for both the D35 and the Chrysler 8.25 and they give a fair amount of detail about measuring bearing preload and how to get it set back to spec once you've replaced the seal. If you would like the details straight from the FSM, let me know and I'll email them to you in a .PDF. FWIW, we usually just rattle them back on until it "feels" right and not worry about it. When I pulled my D35 apart after about 200k miles, it looked fine and the gears were then sold off to someone else.

You don't need friction modifier in a gear driven LSD. Just use the recommended gear oil. The FSM says to use 75-90 for normal operations, 80-140 synthetic for trailer towing. Here is the Eaton manual: http://www.eatonperformance.com/PDFs/TrutracOwner-1.pdf

You are amazingly responsive. Thank you. It's interesting how much incorrect info there is even among the people that install this stuff for a living. I'll dig into the right steps to prelace the pinion seal.
 

John90XJ

Adventurer
dieck said:
You are amazingly responsive. Thank you. It's interesting how much incorrect info there is even among the people that install this stuff for a living. I'll dig into the right steps to prelace the pinion seal.

My pinion seal took a dump this year on the way home from Moab to the PNW. It was about 1,100 miles of gear oil puking out and sailing backward and onto my rear hatch and window. Pretty disgusting. It was the last one however as I did an 8.8 conversion on my return. But done correctly, they last a long time and you might even want to look at the D30 up front and see how it looks if you're in the mood for doing it.

The manual calls for measuring the inch/pounds of torque on the pinion itself prior to undoing the nut. Then there is an additional amount of pinion preload that should be put on the nut when you torque it back down in order to return to the correct torque. Like I mentioned there is a right way and an expedient way....depending on your inclination, both seem to work.
 

toledotimber

Observer
dieck said:
It's interesting how much incorrect info there is even among the people that install this stuff for a living.
You hit that right on the nose. I keep getting fliers/coupons from Jeep dealers and quick-lube places here in Toledo for tranny flushes, oil changes, et cetera. Most of them list exactly how much fluid and what type they're going to add; the funny part is that just about every one lists almost verbatim "full ATF flush." I even called two to see if they were just using ATF as a general term. Nope--they actually believe that the AW4 engine uses it.

Simply amazing, especially when coming from actual dealerships.
 

John90XJ

Adventurer
toledotimber said:
If it has the AW4 transmission, just remember it does NOT take ATF, no matter what any dealer or shop says. It takes Dexron/Mercon.
EDIT: Nice looking Jeep, by the way.


Seems this might be a little misleading.

ATF can be Mercon/Dexron but using some other ATF, like Type F or Mopar ATF +3 or +4 is not recommended in the AW4.

ATF is considered a generic term.
 

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