Fill-hole is on the left of the transmission, about half way up. Used a turkey-baster with a hose on the end of it. You fill the transmission with fluid until it starts to run out of the hole that you are filling it through. It takes about 2 1/2 quarts if I remember correctly.(ATF for first 100 miles , then replace with it with GM synromesh fluid about $10/qt at your local Chevrolet dealer).
I was working on the tranny today and had a similar question. Is the only way to check the fluid level by removing the filler plug? No dipstick I'm assuming? Sorry if this a stupid question. Thanks.
Don't just dump in through shifter hole -- you still need to remove fill plug and have someone watching as you fill, once it starts to come out of fill hole you're full. 2 qts. should be just a wee bit too much (i.e. after about 1.5 qts. really slow down on filling).
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