How to Install a Transmission Flex Plate

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Install a transmission flex plate, to which the transmission bolts and what, in turn, bolts to the engine; learn how in this free auto-remodeling video.

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Video Transcript

Hi, I'm Doug, I work with twenty great guys in St. Louis at Doug Jenkins Custom Hot Rods and we're going to do some work for you today on Expert Village. Now we're going to install the transmission flex plate. It's what the transmission bolts to the torque converter bolts to it, it bolts to the engine. The starter grabs those teeth on the edge so we're replacing that big heavy fly wheel with a nice light flex plate. You can't attach an automatic transmission torque converter; GM fly wheels are often dependent on the displacement in the application. They have a weight on them ahh it's even stamped "engine side" so you don't screw this up. It is easy to screw that up but they are weighted so it has a hole and a dowel that you have to line up. In order to get the counter balance that welded to the flex plate in exactly the right place to balance the engine correctly. Mark is putting blue lock tight on these, there are three grades of lock tight, blue is like service grade. You can break it loose with a wrench, you use red and your going to tear stuff up trying to get it apart. So he's going to put these bolts in there, these are bolts specifically for the flex plate. They are not the same bolts that were holding the fly wheel on. He gets all six of them in there and torques them accurately as well. He'll use a screw driver or a punch there to counter that. You can't really do this on the engine stand.


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