[greasefingers]

For what it worth: I have only used regular gear oil, not synthetic, in the diffs. With over 200k miles I have had to rebuild the front diff. I change both diffs fluid every 30k miles since the day it was driven off the lot. Maybe I should have started with synthetic?

[Windowsrookie]

The manual says to put synthetic in the rear diff if you have the tow package (which I do) I plan on changing the oil completely this summer (not just pumping it out) so will the dino + Friction Modifier be good until then or will it screw up the LSD?

And I'll check codes in the morning it's dark and scary out now.

[Trouble Maker]

Originally Posted by Windowsrookie

The manual says to put synthetic in the rear diff if you have the tow package (which I do) I plan on changing the oil completely this summer (not just pumping it out) so will the dino + Friction Modifier be good until then or will it screw up the LSD?

And I'll check codes in the morning it's dark and scary out now.

No problem with dino and the FM.

Easier to see the flashes in the dark.

[ratmonkey]

Originally Posted by Windowsrookie

I have the towing package, and a V8. So I would assume it has LSD.

the tow package is 3.73 gears, class IV hitch, and tranny cooler. the LSD is only an option, and not a common one at that.