How to Install Transmission Gasket

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Tips for lining up gasket with transmission case. Remove as much of old gasket material as possible. Learn how to properly install gasket when changing transmission fluid in this free auto maintenance video from a car repair professional.

Part of the Video Series: How to Change Transmission Fluid
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Video Transcript

In this clip we're going to talk about the proper way to install the gasket onto your transmission pan. Performing this step will save you a little heartache, trying to line the pan up with the gasket to the transmission case. What I'm going to do now, is clean off my transmission pan bolts. As you can see, it's getting all of my hand, we're got some really nasty fluid on the bolts still. Now, I've put my plug in the top of my drain pan, but we're not going to tighten it down. We're going to drop our bolts right in there, and spray them off with brake clean. Alright, we're going to set our bolts aside, and let them dry for a few moments. Now that all my transmission mounting bolts are dry, we'll take and just set them in there, so I have easy access to them. I have a tube of Permatex Gasket Maker, and my cork transmission pan gasket. Now instead of trying to just set the gasket on there, and fiddle it up to the bottom of the transmission case, and hope that all of the holes line up, what we're going to do is use the Gasket Maker to glue the transmission gasket to the pan with our bolts put through the other way. What I'm going to do is just take a little bit of this Gasket Maker and run it around the sealing ridge here. As my compound seals, or cures, it will form a bond between the gasket and the pan, thus gluing it in place. Eliminating the need for us to fiddle with it on the car. Alright, once we have it all the way down and around, and put the cap back on my sealant, and set it aside. From here, I'm going to take my transmission gasket and line it to the contours of the pan. As you can see, it's not a round gasket so you want to make sure you get it right the first time. Once you have an area set, you're going to take and put a bolt through it. Just like that. That'll insure that the bolts will go through the right direction for later installation. As you can see now, my transmission gasket is held to the pan with the weight of the bolts. All of the bolt holes are going to be guaranteed to line up with gasket and the transmission case. We're going to set this aside and let it cure for about fifteen minutes, and then install it on the transmission case. This the proper way to glue the gasket to your transmission pan.


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