cbohlin
New member
Need some guidance, Jeepers. I have a 2013 Rubicon Unlimited. I'm about to change a bunch of my fluids for the first time. I'm overdue on my diffs. Who knows (for sure) whether or not I need the friction modifier additive? Most places I'm reading say I don't need it. Dealership says I do. I've already noticed my actual differential fluid is different from the '12 and '14 models (80W-90 instead of 75W-90) So, I'm looking for someone who knows '13 model Rubicon. So torn on what to do...will adding the friction modifier hurt anything if nit needed? Thanks so much!