Some early 9" fords ring gears were only 8.5
In a 1997 Ford Aerostar ( REAR differential ) With the 7.5 " ring gear ( 3.5 U.S. pints ) With the 8.8 " ring gear ( 5.0 ) * traction lok , add 4 ounces of friction modifier
THE TORQUE SPEC IS 75FT/LB USING ARP BOLTS
No, they are a matched machined set.
Broken gears. The differential or ring gear or pinion gears are broken.
Differential, with 10.25 ring gear Rear..........7.4 pints Differential, with 8.8 or 9 ring gear Rear..........5.5 pints Differential, Dana 70 HD Rear..........7.4 pints Differential, Dana 60, 61 Rear..........5.9 pints Differential, Dana 70 EX HD Rear..........6.5 pints Differential, Dana 80 Rear..........8.4 pints This link should help if you Identify which you have if you don't already know. http://www.drivetrain.com/rearend.html Hope This Helps.
Ring gear 90 ft pounds Bearing caps 60 ft pounds
3.55 turns of the input shaft to one turn of the ring gear and axle shafts.
If there isn't a visible tag under one of the cover bolts, it may be stamped on the ring gear.
The big piece in the center that the ring gear bolts to and houses the spider and side gears.
Look on the differential cover and there will be a tag with the ratio on it.
Number of rotation of the input shaft to turns of the ring gear. For example, a 3.55 gear ratio would mean the input shaft rotated 3.55 turns for each turn of the ring gear and axle shafts.
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.