They came with different ratios. Look at the code sticker with all the three-character codes. Could be on the door or inside the glove compartment. Look for a GU with a number. If it has a G80 by it then it's positraction. GU6 is a 3.42 and you can look up all the others online. Search GM RPO codes and it will tell you.
3.73
yes, but not if 4wd
most Z's had the 3.42 gear ratio.
more than likely it's a 3.08 gear in the rearend.
Jeep Wrangler only,
Do you mean gear ratio or rearend size?
what trans u got
The gear ratio for the 1979 Mustang V8 is 2.47:1
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.
probably a 3.08 gear unless the high performance axle was ordered and then it would be a 3.23.
2.73
The gear ratio in the 1979 Ford Mustang turbo four is 3.45:1