Need to know asap

I've looked through the manual and even called the mazda dealer, and to no end no info! What is the size of the ring gear in a stock b2200 2wd? and what kind of diff are in them? please help me out anyone, thanks

Well i can help you with the ring gear and pinion ratio. If you want to get an estimate jack the rear end in the air with the truck in nuetral. Then mark the yoke and housing and spin the yoke until the tire makes one revolution. If you spin the yoke a little more than 4 revolutions most likely its 4.10 or close to it. If you need to know the exact number then pull the diff cover and count the number of teeth on the ring gear and the pinion then it's simple math. Divide the number of teeth on the ring gear(RG) by the number of teeth on the pinion(P) and thats your gear ratio(GR).
RG/P=GR.
If you wanting the actual size like in inches cant help there either, but you could just pull th diff cover and measure it.
Hope this helps.

It's a 7.5" ring gear. I don't know the number of teeth on the ring gear, but the final ratio of the ring/pinion on the B2200's is 3.909.