Jim Clark

I’m looking for a better method of marking pinion and ring depth mating surfaces. I’ve used plain grease in the past but wondered if anyone had a good material that stood out better for measurement purposes for contact points.

Professor Helmüt Tester

Grease pencil / tire crayon, or chalk.

fatbillybob

industry standard = prusian blue

any auto parts store that has engine rebuilding supplies

tinman944

white litho spray. works great and easy to alpply, just spray and watch for even patterns

38D

There is a yellow grease like substance that you can get at any Ford parts shop...stands out very well.