Front & Rear Diff Lub - 99 Blzr 4WD

Greetings -

Time to change the diff's fluids. So what's the recommendations ?

Any Dino 80W-90 GL-5 Gear Lube or go to a 75W-90 Synthetic.....

Been using Dino lube for a long time....thinking of Vavoline 80-90 but am interested in what you all are using .....

Thanks

"T"

I'm about to do it too. I'm going with Valvoline Syn 75-90

Absolutely nothing wrong with using Valvoline 75-90. I have it in the diffys in my rig. Helps reduce the warm up time and silenced a very, very mild whine in winter temps until she tracked 10 miles and warmed up the lube.

Make sure you use a TRUE SYN like Amsoil, Mobil1 etc...