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How pan stand pipe works to control level. Fluid is pumped into the transmission pan until the level reaches the top of the stand pipe. It then
overflows out of the transmission. This level is higher when the car is not running versus running due to the hydraulic pump pumping fluid through the
transmission.
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The entire procedure is documented below from start to finish for ease of discussion.
Good idea to put the car up on lifts, drain the fluid, drop the pan and unbolt the filter at night.
Let is sit overnight, it will drain all night long.
The car must be at ambient (cool) temperature before filling the transmission! This requires the car to sit overnight to completely cool off.
Install the new filter the next morning (don't forget the filter to transmission o-ring/gasket), bolt the pan up. Fill the pan with as much fluid as
you can with the car off (until it starts flowing out of the standpipe, what I call the fill hole).
Start the car. Right away it will start taking more, give it about 20-30 seconds to start pumping fluid through the tranny.
Keep filling until it overflows. Should be 2-3 more quarts (initial fill about 4 quarts).
Have somebody run through all the gears for 30 seconds each (with the brake on), when doing reverse, the fluid will flow out, let it, then go through
N,D,4,3,2 30 seconds each. This is about 10-15 minutes into the fill after the car started.
Let the car run another 2 minutes, then run it through all gears for 30 seconds again, do Reverse for a shorter time because it will squirt out.
Keep filling so it has a slight overflow at all times.
If you have the Ross-Tech software, monitor ATF fluid temperature on group number 4, under measuring blocks, transmission module. The temperature of
the ATF fluid during this procedure should be 30-45 C. If the engine is operated for about 15 minutes from ambient temperature, it will reach
somewhere around 45 C at the end of the 15 minutes. This is why the car must be cooled overnight. If you do not have the software, just ensure it was
cooled overnight. It is not absolutely critical to measure ATF fluid temperature. However, you CANNOT do this if the transmission is not at ambient at
the beginning of the fill.
You'll need a total of 8 quarts of ATF on hand, I would have 9 there in case you spill one...you just might.
BEFORE TURNING OFF THE CAR, put the stand pipe plug in (fill plug). Turn off car. The procedure is complete. Test drive it for a few days, if anything
does not sound correct, check level again. However, your transmission should be operating significantly smoother. There is no need to check the level
again if there is nothing wrong with the transmission.
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