how I find the gear ratio of a jeep wrangler differential from Dana Corp.?

Answer 1

the second post got it correct, but on Dana gears it will list the date of manufacture and then the number of teeth on each gear for the ratio. i.e. 7 06 10 41. the first numbers tell you july 2006, and the second set of numbers is the number of teeth on the pinion and the ring gear, divide them and you would get 4:10s.

Answer 2

Most axles will have a small tag attached to one of the bolts that holds the differential cover on. If no tag is present you'll have to remove the cover and rotate the ring gear until you see some numeric characters stamped in it. there will be a part no., perhaps a date code, and the ratio will appear as either a direct read such as 3.91 for a 3.91 ratio or it may appear as 45:14 in which case you have to grab the calculator and do the math. A 45:14 would be a 3.21 axle ratio. You may be able to take your vin to your local jeep dealer, have them enter it into their computer and it may tell you what ratios the vehicle was delivered with. If your the only owner of this Jeep, the dealer thing will give you correct info if that works out. If your not, and/or you know its been changed you must read the ring gear stampings.

Answer 3

There should be a tag on one of the cover bolts. If not you can get pretty close by taking a piece of chalk and putting an alignment mark on your input yoke and diff. housing as well as one on brake drum and backing plate make sure that BOTH wheels make one full rotation in the same direction while counting how many times the input shaft turns. three turns of the input shaft would be 3 to1 / three and a half turns would 3.5 to1and so on.

Answer 4

the best way to figure it out is to remove the cover and count the teeth on the ring and pinion gears and divide them. that will give you the exact ratio.