easiest way to tell is to give GM Parts a call at any dealership and give them them the last 6 digits of the VIN this will tell them all the info you will ever need about vehicle.
more than likely it's a 3.08 gear in the rearend.
The stock gear ratio for a 1995 Chevy Blazer is 3.73. This provides a good balance of fuel economy and power to the rear wheels.
3.73
Call a Chevy dealer and ask for parts dept. and give them the VIN# and ask them what the gear ratio is and they will tell you.
yes, but not if 4wd
Same as the rear.
Open the cover, count the teeth on the big gear ( the ring gear ) next count the teeth on the small gear ( the pinion gear). Divide the big gear by the little gear and that is your ratio.
85W90 gear oil.
I have a 2002 Blazer with the 4.3L engine and 3.73 differential gear ratio, it gives me 17 mpg on average.
You'd have to look at the RPO code in the glove compartment to determine this, as there were a couple different options. The gear ratio for the front and rear axle will match.
80 or 85W90 gear oil.
The easiest way is to write down the VIN # and then call a Chevy parts dealer and tell him you would like to know the gear ratio in your 2008 truck. And that you have the VIN #. He'll take care of you.