[themachinist]

Im looking to do a complete fluid change in my 9 lx 4cyl ive never changed the fliud in an a4ld converter and have heard that you can do it while its in the car. any help with this would be appreciated. any numbers on over all fluid would help too.the .

the other question has to do with idle, sometimes when stopped but in drive the car will "jump" from 8-850 rm idle to a number between 1500 and 2 and when this happens it wants to pull the car along like im giving it gas while braking, and i sometimes notice this while driving, say im coasting w no gas alied it seems that the car is getting gas but not from me and when it cuts out(in driving it feels that the car cuts off but it just goes back to norm rpm

[dakine858]

First off, make sure you have a large drain pan because the total fluid capacity for your trans and torque converter is 12 quarts.

Here's what you need to do;

- Jack up both sides of your Mustang and place it on jack stands

- Remove the lower engine dust cover

- Rotate the torque converter until the drain plug comes into view

- Remove the drain plug and allow the transmission fluid to drain (it's going to take some time)

- While it's draining you can start removing the transmission fluid pan so you can change the filter (this is a must)

- Loosen all of the bolts and carefully break the gasket seal and allow the fluid to drain out of the pan (this can be a bit messy)

- Remove the bolts and lower the transmission pan at an angle to drain out the rest of the fluid

- Throw the old gasket away and carefully clean the gasket mating surfaces (DO NOT allow pieces of the old gasket to remain on the valve body or in the pan!!!)

- Clean the transmission oil pan thoroughly using a safe solvent then allow it to air dry. DO NOT use a cloth to dry the pan because it might leave behind bits of lint

- Now you can loosen and remove the filter screen retaining bolts then lower the filter screen from the transmission

- Install the new oil filter screen making sure all gaskets/seals are in place, then reinstall the screws.

- Place a new gasket on the fluid pan and bolt it back up to the transmission

- Tighten the attaching bolts to 96-120 inch lbs.

- By now the torque converter should be drained so you can reinstall the drain plug.

- Once everything is buttoned back up, take your car off of the jack stands and pour in 12 quarts of transmission fluid through the dipstick sleeve under the hood. (Drive your car easy for a few miles to allow the torque converter to refill and circulate the fluid through the new filter)

[themachinist]

thanks much for the info. any help on the rpm problem would be great too

[themachinist]

bump why is my car idling so erratically while in drive but stopped it will jump 6-800 rpms and engager the transmission and ull against the brake..also see above