The bolt socket I used is heavy, weighs about 2lb. The theory behind it is simple physics, more weight combined with the air gun means more torque (f = m x a) on the bolt. It took a couple tries with my 150lb donut compressor. Thing is, you only use it once, but it was worth it. I’ve heard all kinds of horror stories about getting that bolt off with a regular socket and breaker bars, heating the bolt, etc. I didn’t use it to reattach the new bolt, I had to use a three foot extension and three foot breaker bar for that task. Forty pounds of torque, then another 60 degree turn, that was tough. Got it to about 45 degrees, and it wouldn’t budge anymore. Still on there, hasn’t moved yet.
Here’s a pic of the socket, if you’re interested.
I have an owner’s manual, it shows how to change the tranny fluid and filter. But, yah, I should get a service manual.