What is the grey sealant used on the AAM differential cover?
SLP uses a sealant is called Three Bond 1216; it is imported by Three Bond of America, Inc. It is a high temperature, non-hardening product that and is not adversely affected by the GM Lubrizol differential additive. Three Bond does not market this product directly. However it is available from a Suzuki motorcycle or car dealer. They call it Suzuki 1216 (part number 99104-31160).