Clark GPX30MB, GP138MB-0099-6967- this truck is equipped with "one use" drive axle seals that actually seem to be of "no use". The problem is, no matter how careful this seal is installed and no matter how carefully the brake drum is installed, the seals leak ruining the brake shoes and then you start all over again. We have talked to a few Clark dealers and were advised that basically you get lucky when the seal doesn't leak. I know that this model wasn't one of the best trucks that Clark ever made, as a matter of fact it may be one of their worst. Is there a different seal that we can use or can anyone tell me the secret to fixing this.