Here's a link to what is the best transmission textbook I've ever read. It thoroughly covers theory and principles of operation. Copyright date is 2003, but don't let that fool you. All the information is up to date. No dinosaur illustrations or transmission types.

Although the book is out of print, it is still available from Amazon at: http://www.amazon.com/gp/offer-listing/[...]/ref=dp_olp_new?ie=UTF8&condition=new

for around $15.

I purchased the book about 10 years ago when it first came out for $150 and it covers the late model transmissions and the electronic and hydraulic systems that control them in great detail. If you want to know the how and why of what makes an automatic transmission tick, then this is the book for you. http://autop.ro/9FS [autop.ro]

This book covers torque converters, lockup, valve bodies, computer systems, gear trains, planetaries, and every facet of theory and principles of operation of an automatic transmission you can think of. This book DOES NOT cover rebuilding procedures, per se. It's strictly upper level learning.

This book will be a godsend for those who need to diagnose transmissions, especially those transmissions that don't exactly work as expected after an overhaul or rebuild. This book is for YOU.

Larry from Utah