Review on Revitalize Your Vehicle with Bar's Leaks 1816 Differential Gear Repair by Hco Cortes

I have a 2003 Land Cruiser that is leaking front diff (front axle seal) fluid. I bought it and found it was leaking when I changed the transmission fluid. Front differential oil may never have been changed in 205,000 miles. The filler plug differs from other plugs in that it is a Torx. Looks like someone tried to pull it out with a hex and failed. In any case, when drained, it turned out to be in the form of a jelly-like black goo. The cork has a long tail made of metal particles in the slime. Very little liquid came out, except for black mucus. Anyway, I changed the fluid and the leak was obvious and the diff was whining too. I have used this product and the leak seems to have slowed down a bit but the whining is still there. To be honest I haven't driven the car that much since I added the product. Therefore, more kilometers may be required than indicated on the label. I gave it a 4 because I believe it does a little to help reduce leakage and may work better if I put more miles on at a time. I also think the differential and seal damage may be too severe to be repaired with chemicals.