Originally Posted by J.5
I just rebuilt Disco I front and rear axles for my project truck... and I'd like to try a synthetic gear oil in the diffs. Any suggestions on a good synthetic? brand and weight? Thanks.
I'm a Redline user, but there are other good Synthetics out there. I've heard some bad things about Mobil One's gear oils, and their additive packages being a bit weak, but no personal experience, so take it with a grain of salt.
This is something else you may want to consider. I don't know what you changed when you rebuilt the diffs, but when I had ARB's put in another truck, the driveline shop recommended running dino 80W140 for the first 500-1,000 miles (before switching to synthetic) to make sure new parts would break in properly.