[Blue Bowtie]

It really doesn't matter if the converter got filled (technically, half-filled) before installation. While it's always a good idea to add oil to the converter before installation to assure lubrication and some turbine drive on startup, the trans oil pump will fill the converter pretty quickly as soon as the engine starts and runs the pump. The Buicks use a 9½" converter and it holds just under three quarts. It takes a good trans pump about 326 revolutions to move a gallon of oil. That means with a curb idle of 850 RPM the converter would be filled in less than 20 seconds if ti were completely empty Since it can only gravity drain halfway when the engine shuts off, that would be more like 10 seconds. Granted, some oil is always being routed to the differential for lubrication in the 4T60 and 65 transmissions, but the point is that the torque converter will fill pretty quickly on startup unless there is a problem with the trans hydraulics, input shaft seals, pump, or converter check valve in the end of the turbine shaft.

This is just one more reason to start the engine using a regimen, allowing the engine and trans oil to start circulating properly before putting any load on the engine (such as revving or placing it in a gear). If you want maximum service life and satisfaction, turn on the ignition, watch the MIL "bounce" one to prove it has passed the POST, make sure the warning lights operate, wait for the SECURITY light to turn off, wait for the ABS light to turn off, allow the fuel pump to run its prime cycle, THEN crank the engine. you can learn a lot by just watching the system operate, if you know what you are looking at.

Once started, release the key immediately and patiently allow the engine and trans to warm for 60 seconds. Either that, or live with all the problems caused by the abuse. The worst thing you can do to an engine is start it. Since you have little choice, start it in the most conservative manner. The second worst thing is load the engine before it is at ready, and the next worst is to operate under heavy load before it is at full temperature. If you like having a new car every year, disregard the previous instructions.