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- Make sure the fluid is
warm. Warm up the car so the transmission is at normal operating
temperature. Pull the transmission dipstick (located near the firewall in
most cars). Fresh fluid is translucent and cherry red. Some darkening is
normal, but if it is reddish brown or mustard color and smells like burnt
varnish, it is worn out.
- Drain the fluid by
loosening the pan. Select the correct Hastings filter replacement based on
pan shape and prepare a large pan to catch the fluid. Then loosen each pan
bolt a turn or two and loosen one corner more than rest. Drain mostly from
this corner.
- Finish removing the pan
and any gasket material from the pan or case. Avoid scratching the metal
and make sure the pan’s gasket surface isn’t bent or distorted.
- Remove the old filter.
Most transmission filters are held in place with a bolt or two, but some
are held by a clip. Be careful to include O-Rings or other seals.
- Install a new filter. Use
the clips or bolts from the old filter. Be sure O-Rings, etc. are in
place. If the filter has a long intake neck, gently push the neck into
place without unseating the O-Ring.
- Clean the pan thoroughly.
Inspect the pan before cleaning. A small amount of fine gray clutch dust
is normal. However, if you find metal shavings, there has been
transmission damage. Clean the pan with solvent and wipe dry so there is
no harmful residue.
- Position gasket on pan.
Some gaskets have four holes slightly smaller than the rest to allow four
bolts through the pan and through these smaller holes to hold the gasket
in place.
- Hand tighten pan bolts in
a criss-cross pattern. After that, use a torque wrench to tighten bolts to
proper ft-lbs as per manufacturer.
- Refill the transmission
using only the amount shown as “refill capacity” in the owners manual or
"AMSOIL Product Selection Guide,” using the type of fluid specified for
the vehicle.
- If doing only a partial
fluid replacement, skip to instruction 12 below. If doing a complete fluid
replacement, follow the steps in instruction 11.
- You now have replaced the
fluid in the pan. To replace the fluid in the torque converter and oil
cooler also, follow these steps.
Step 1. Obtain the total system capacity of
the vehicle from the manufacturer or AMSOIL. Have this amount readily
available.
Step 2. Disconnect the oil cooler line from
the oil cooler. As you may not know which is the pressure side and which
is the return side, have both directed so the stream of fluid will be
directed toward a receptacle.
Step 3. With another person, be prepared to
add ATF to the fill area as it is being pumped out of the oil cooler line.
Step 4. Start the engine, and as the old
fluid is pumped out, add fresh fluid to the pan.
Step 5. When either the fluid color brightens
or the total capacity has been replaced, shut the engine off and re-attach
the oil cooler line. All fluids has now been changed.
- Recheck the fluid level.
With the car on level ground, set the parking brake and the transmission
in “Park” or “Neutral.” Let the engine idle for a few minutes. Shift the
transmission into different positions before returning the lever to “Park”
or “Neutral.” Check the fluid level again and check for leaks.
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