Howdy, I own a 95 Camaro, 3.4L & I am changing the Rear Dif fluid, I have heard info on both types of gaskets, with or without the slots leading to the ports for the axels, I do mostly hwy driving at 55-70 mph, Any suggestions as far as which gasket to use, Does it make any difference ? Also, A friend suggested using Lucas 70/90 HD gear oil. Any help would be greatly appreciated, Thanks in Advance
Jim

 

Here's ALL the gasket you need to use, and nothing more: Permatex RTV
And yes, that Lucas oil is a very good choice.