Motorguard M100 TP rolled changed out with 27,000 miles on it. It's in a 2009 Ford F350 with a Detroit 4-53T/Ford 5R110. I found no material or metal on the magnet, so another TP roll went in. I've topped the fluid up with one quart and run another 10,000 miles before I change another roll. Happy 5R110.