salad

No need to "flush". Just keep changing it until all the crud's out. No risk of disloding crap that way.

chillislander

I need to know how to shim the gears and or pinion gear in my dana 30. Its has 4:56 gears. I just swapped the axle and noticed some slop in the gears after getting it all back together. I have a shim kit just not sure where or how to use them. Any help? Thanks!

bhennessee1

You need to take the jeep and have the gears set up, it's not a shade tree job.

chillislander

The gears are set up. I had the gears done then later bent my axle. I put another axle in. Now I just need to know how to shim the gears and or pinion

Jeepyjeepy

Placing shims is apart of the gear setup. If your swapped gears between axles it has to be done again

Tino

I have a '99 Cherokee Classic 4.0L. During my first few accelerations it starts sputtering. If I step on the gas it lurches out of the sputtering and then drives fine for the rest of the time it is running. Also, my Cherokee will sputter and lurch when I am in gear and stopped at a light. When in neutral this stops. With this the check engine light is on and the code is reading an O2 sensor. I have replaced both of them, the spark plugs are less than a year old, and I change the oil every 3,000 miles. The vacuum line looks like it is in good shape as well. Any thoughts?

bhennessee1

^^^ this.

tgun88

just bought a wj to go along with my xj...anyone know about the 231 amc transfer case thats in the wj? it has the vaccum to engage front axle. im gonna swap out front axle to a newer one, can i run this t case and just get rid of the vaccum crap? and is it any good?

bhennessee1

Eh did t have vac disco or a 231, I'm guessing you meant to type yj? It's as simple as swapin in a non disco axle and forgetting you ever had a disco axle. And it's a np231 not an amc t case

96xjclassic

Research your "IAC". It sounds like it may need to be cleaned.

cruiser54

Here's how to clean the tb and iac.



Courtesy of TJWalker:

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The Idle Air Control (IAC) is mounted on the back of the throttle body. (front for 87-90) The valve controls the idle speed of the engine by controlling the amount of air flowing through the air control passage. It consists of a stepper motor that moves a pintle shaped plunger in and out of the air control passage. When the valve plunger is moved in, the air control passage flows more air which raises the idle speed. When the valve plunger is moved out, the air control passage flows less air which lowers the idle speed. Over time and miles, the IAC can get carboned up which can have an adverse affect on idle quality. Cleaning the IAC may restore proper function and is an easy procedure to perform and good preventive maintenance so it is never a bad idea.

CLEANING THE JEEP 4.0 IDLE AIR CONTROL

Remove the air filter cover, associated hoses and the rubber boot that goes from the air filter cover to the throttle body. Remove the IAC with a torx driver (2 bolts; one can be kind of hard to get to)

"Gently" wiggle out the IAC from the throttle body. Gasket on the IAC can be re-used if it is not damaged

Clean the IAC with a spray can of throttle body cleaner; inexpensive and available at any place that sells auto parts. Throttle body cleaner is recommended rather than carburetor cleaner as it is less harsh, safe for throttle body coatings and is best for this task. Use cleaner, a rag and a toothbrush and or Q-Tips. Be gentle; don’t twist or pull on the pintle that protrudes from the IAC as it is fragile and you could damage it.

Thoroughly spray clean and flush where the IAC seats in the throttle body with the same spray cleaner

It is also a good idea to clean the entire throttle body itself, the butterfly valve inside of the throttle body and all associated linkage as long as you have things disassembled

tgun88

it has the vac disconect on front axle that im going to change out but trans case has vaccum to run the disconnect...can i just run that t case and get rid of vac lines? it is a new process t case but tag does say 231 amc on it

bhennessee1

The t case has a breather not a vac line iirc. Don't worry about anything other than the axle. Just cut the vacuum tube to the axle short and plug it.

Jmb94

Rough Idle at all?

Tino

Not really