I believe using auto-rx in your Differential is a win win situation. I have used the product and after 1000 miles of auto-rx in the Differential the gears looked brand spanking new. So auto-rx does a good job of keeping things clean in the Differential.
But, I think there is another important benefit, axle seals or whatever seals are in the Differential, if these seals leak they can send Differential fluid up to your brakes, it is not a cheap job to fix this situation.
Auto-Rx will keep these seals in your Differential pliable so there are no leaks. Whenver you are about to do a Differential Fluid change put in some auto-rx per the instructions in the Differential Application 1000 miles before a fluid change, and the little bit of auto-rx will save you money on not having to replace axle seals or any other seals in your Differential.
I had a friend whose axle seals were leaking, and he was charged almost $300.00 to get them replaced with new seals.
