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Originally Posted by r82148v
I have a 1999 cherokee sport with 90k miles on it. It has never been abused as in off road or through water. I bought the jeep a few years back with about 40k miles on it..
I want to get my Transmission fluid flushed and filter changed since I have NEVER had it changed before !! I bet your grinding your teeth on this one lol.
I don't have any problems besides having to push down on the gas more than usual to kick it down a gear and to help gas mileage...
I called FIRESTONE FULL AUTO CARE and what they told me was strange and something I never heard before. They told me since I never changed the fluid before and having 90k miles on it, NEW FLUID would HURT the trans and possibly make it slip.??.. Does this sound right to you guys? I figure a new fluid and filter change would be the best thing for it..
They told me they will not do the fluid change and to call another place that they referred to me.. I think they are just throwing business to a friend or something..
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First things first.
Theres a cable that runs from the throttle body to the transmission (TV cable). This lets the transmission know what position the throttle is in so it knows when to down shift as you give it more throttle. Theres an adjustment at the throttle body. Its an easy thing to adjust but there were some changes in the adjustment mechanism over the years and Im not sure whats on a 00. Basically you open the throttle all the way and adjust the cable so it has no slack. This should fix your problem with it not wanting to downshift.
Now for the fluid and filter change. Its common opinion that a high mileage AW4 (XJ automatic) that has never had a flush and is operating fine should not have a flush because it can stir up dirt and debri that has been laying quietly and harmlessly. A flush is different than a fluid and filter "change". To change all the fluid you need to remove one of the tranny lines and hook up a pump (or use the tranny pump) to pump old fluid out while pumping in fresh fluid. this shouldnt desturb any of the sediment. You can change about half the fluid by simply draining it from the drain plug in the pan. This wont change ALL the fluid in the tranny because some of it will remain in the torque converter. You can change the filter by dropping the pan.
In your case, if you arent having problems (that the TV adjustment doesnt fix) and the fluid doesnt smell burnt or look dark and dirty, I would just drain and drop the pan so you can look at the magnet and see how much, if any, gunk is in the pan, clean things up in there and replace the filter and top off the fluid. If its good and clean, your good to go for a long while. If its a mess in there, give it a couple months and drain the fluid again then in a few months, drop the pan again to see if it stays clean.
With only 90K on it, your AW4 should be nearly spotless inside and will probably just require that you drop the pan to check it and replace the filter (just because you can) and top off the fluid.
EDIT: Heres what I found for the TV cable adjustment on later models. I dont know if this includes your or not.
"Late model JEEPS have a half round push button cable lock. Push the half round button located at the back of the bracket near the throttle body and push the cable into the sleeve. From the drivers seat, push the gas pedal all the way to the floor."