gear ration

I just opened up my rear diff on my new (or old) xj. Its a 89 4.0 auto and i need to know what my gear ratio is. No the tab was not still on the cover, someone lost it. The last 4 numbers on the ring gear is 39 11. What ratio is that? Is it 3.55? Thanx for any info.eace:

39 divided by 11 = 3.545 ratio. you have 3.55 gears in your xj.

just wanted to make sure i was in the ball park thanx again.:cheers: