You must pay very close attention to the valve body and the fasteners that attach it to the case, especially for the electronically controlled units, as several different length fasteners were used. The valve body can be left in place, and then carefully removed after removing the internals from the unit. One must keep in mind that when working with any year or model of the 700 transmission, you can remove all of the internal components down to the low/reverse apply piston without disturbing the valve body. Torrington bearings use tiny needle bearings between two metal halves (left). Some thrust washers are made of plastic (right), others are made of metal and may have a soft babbit or brass surface (center), others are the Torrington-bearing variety. Transmissions use thrust washers between components to allow them to turn at different speeds without wearing out their mating surfaces. You can copy and paste this link to share: SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. For a comprehensive guide on this entire subject you can visit this link: LEARN MORE ABOUT THIS BOOK HERE This Tech Tip is From the Full Book, GM AUTOMATIC OVERDRIVE TRANSMISSION BUILDER’S AND SWAPPER’S GUIDE. In reality, these transmissions can be correctly overhauled, and even upgraded, with a minimal amount of special tools and procedures. At a glance it all certainly seems complicated. Maybe it’s the complexity of the valve body, or host of internal components, sprags, planetary gears, clutch packs, etc. I have known some extremely talented mechanics, and most still stay far away from any automatic transmission work. Rebuilding automatic transmissions has always been an area of the automotive hobby that has typically been left to professionals and a rare few hobbyists.

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