I had mine leak last year. It was soon after I replaced the seal. I found out the top of the seal had snaked inside the tank and there was no "sealing" at the top of the sending unit. I put some KY Jelly (don't ask) and affixed the seal to the inside flange of the sending unit. I also took the lock ring and pried the tabs UP a little. Put it back on and it also helps if you have the fuel lock ring wrench. Its on eBay for $9. It really helps for the Charger because the lock rings is trapped on the upper half of the tank and you either have the rear axle sitting on your chest or you have it up high. Either way its a tight spot. Sealed up (thanks KY) hahaha