I've recently replaced the oil in the differential and I was wondering what the general practice is when replacing the bolt in the filler hole. Would the default be to just tighten it up or use a sealant. I looked at a potential sealant but I was put off using it by reading that heat and specialized equipment would be needed to unseal it.
If it's general practice to use a sealant for these tasks is there one you'd recommend ?
