yes I'm afraid you do , it is a one piece seal and it is located behind the engine flywheel and the only way to replace it is by removing te transmission
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To replace the sunroof seal in a Mercedes 300E, first, carefully remove the sunroof panel by releasing the clips or screws holding it in place. Once the panel is off, carefully pull out the old seal from the groove and clean the area to remove any debris. Next, apply the new seal by pressing it firmly into the groove, ensuring it fits snugly. Finally, reattach the sunroof panel and test its operation to ensure it closes properly.
Replace the rubber seal. You could seal with silicone but you would be unable to open it again.
Replace the seal.
Aprox 7 hours for a 2 wheel drive or 9 hours for a 4 wheel drive.
To replace the rubber seal on a Gen 7 Celica sunroof, first, carefully remove the sunroof panel by following the manufacturer’s instructions. Once the panel is off, locate the old rubber seal and gently pry it off using a flat tool. Clean the groove thoroughly to remove any residue, then install the new rubber seal by pressing it firmly into place, ensuring it fits snugly. Finally, reattach the sunroof panel and test for proper sealing.
To repair a front seal leak on a 1998 Ford Expedition, first, ensure the vehicle is safely elevated and supported. Remove the drive belts, then detach the crankshaft pulley and timing cover to access the front seal. Replace the old seal with a new one, applying a light coat of oil to the seal before installation, and reassemble all components in the reverse order. Ensure the system is properly sealed to prevent future leaks.
The seal should run about 10 dollars or less. The mechanic shouldn't charge more than 40 dollars or so. It is a pretty easy job. Buy the seal, remove the driveshaft, knock the seal out, replace it with the new one and reinstall the driveshaft. Piece of cake. good luck.
Replace the seal.
drop transmission remove old seal replace with new seal