LUBE LOCKERLLR-F880 Lubelocker

The LubeLocker gasket is made of steel that is rubber-coated on both sides, with an additional elastomer sealant that is applied at the factory. The metal gasket is strong (blow-out proof), it seals perfectly, and is re-usable many times. It comes with instructions for tightening the bolts in a specific pattern -- follow the instructions exactly, and you're good to go -- and go -- and go !! I used the LubeLocker gasket with a cast aluminum differential girdle -- perfect fit, easy install, and the results are leak-less !! The LubeLocker gasket is applied DRY !! No need to mess with RTV sealer EVER AGAIN !! WARNING !! Use a good (clicker) torque wrench, and DO NOT tighten the cover bolts to more than 25 ft/lbs !!UPDATE: 10/10/16 - Now at 5,200 miles since installation -- speeds up to 110 mph -- Air temps from 37 F to 105 F. Wiped the bottom of differential and cover with clean paper towel -- CLEAN AND DRY !! UPDATE: 7/17/2018 - Two (2) years since installation -- Speeds up to 110 mph. Air temps from 34 F. to 116 F. Wiped bottom of differential and cover with clean paper towel. STILL CLEAN and DRY !! Need a leak-proof gasket !?? Get a LUBE-LOCKER !!

This is a flawless fit for the Ford 8.8" differential. I used it on my 2005 Mustang and it was easy to install, and after torquing it down properly, it hasn't leaked a drop in a few years as of 2023.

I used this for my 2003 Mercury Grand Marquis.It fit perfect, hasn't leaked a drop for 3 months so far!My method of install:1. Clean inside diff with brake clean, avoid getting into crevaces, use shop Rags to soak up all oil and liquid.2. Use 60 grit on both mating surfaces to get rid of corrosion, pitting, etc. Then 320 grit, 600,1000, and then 2000 to get a good mating surface.3. Use canned or compressed air to blow out holes4. Apply layer of Full Synthetic, high heat, bearing grease to mating surfaces and seal.5. 2 bolts, on at top, one at bottom to align seal and cover, hand tighten.6. Insert and Hand tighten all bolts, every other bolt.7. Use ratchet at the head to tighten every other bolt snuggly, and then do other bolts same.8. Tighten down every other bolt to 16 ft. Lbs and then with other bolts.9. Fill diff to fill hole.10. Spray down around seal and plugs with brake clean really well.11. Drive about 150~ miles, Check for leaks around plug holes and cover plate. Check fill level and fill if needed.Hope this helps anyone out! Been doing this procedure for years on many vehicles, including friends, family, and my own vehicles. I've never used RTV or gasket sealer. If you want more auto tips, email me at wfh2ii94 @ gmail.com!

I’ve used these many, many times. I’ve never had a problem with one. They work perfect

What a great product. No more RTV.I will be buying one for the rear axel next.

Very heavy duty gasket, couldn’t be happier

Easy to fit and works great.

Almost 15K Miles & no any leaksNice gasket & I hope you make a better one8.8 gear