There are four ways to find a ratio.
1 A dealer can normally tell from the vin number.
2 There are normally tags or labels on the axle that have part number, gear ratio, and fluid requirement
info.
3 You can count how many times you have to turn the driveshaft to get one complete turn of the tires.
4 You can divide the number of teeth on the ring gear and divide by number of teeth on the pinion.
Limited Slip Differential 3.55 gear ratio
2.833 is the rear-end gear ratio
The gear ratio is 3.60:1, this is for the front limited slip differential.
4.63
A good majority of the 1984 Ford F150 gear ratio had 3.00 gears for the stock. In addition, the spline should be a 31.
80W90 gear oil.
I own a 1984 F150 XLT with a 351w (5.8 liter) and a 4V Holley carb. I 'just' had the differential rebuilt and the Ring & Pinion gear ratio that was in there was 3.0. It is a 9" Ford differential (stock). I had it replaced (it was worn anyway) with 2.75 ratio for better highway driving. I am not sure about the HP, though. My truck is wholly stock and I have been giving it a 'rolling restoration' since my late brother passed away in 2006 (I inherited it from him).
a 10 bolt differential case has a 8.5 ring gear .a 14bolt has 2 different covers one is a 9.5 the other is a 10.5
85W90 gear oil.
more than likely a 3.08 gear.
9/41
An axle ratio is a comparison of the number of ring gear teeth to the number of pinion gear teeth in a differential. For instance, a 3.55 gear ratio means that there are 3.55 ring gear teeth to every 1 pinion tooth.