Could be 3.21:1,3.55:1,or 4.10:1 . The dealer could tell you off of the vin, there may be a tag on the axle, or you could count how many times the driveshaft turns for every turn of the wheel.
If the front is 3.55, then the rear needs to be 3.55
http://www.off-road.com/trucks4x4/bigbroncos.tech/Bronco-Rear-Axle-Codes-and-Ratios/ArticleStandard/Article/detail/304644your gear ratio is 3.55
Yes
First FWD means Front Wheel Drive, but I assume you mean Four Wheel Drive, the torque is 175 ft/lbs then tighten till you can fit the cotter pin into the hole.
All viper's are rwd
If Fwd and the front tires are on the dolly. yes.If Fwd and the front tires are on the dolly. yes.
it should have a fwd stick beside the gear shifter and it should tell you witch way to pull or push
Yes, whether you are replacing the whole rear-end or just the center diff they are interchangable. Just be sure the gear ratio is the same if it is a 4wd, if it is a 2wd can be any gear ratio. Higher for better gas milage such as 330 or 355, lower 373 or 410 for pulling power hope this helps.
to put a 99 fwd in low you must put the truck in neutral then ingage the transfer fo fwd low if the transmission is not in neutral in most vehicles it will not allow fwd low to be used
Yes.......but you need to make sure it has the same gear code. You can check this in the glove box. The code starts with a G (example-GU6)
Drive on an automatic transmission is usually a good place to start.
The front wheels must be elevated, minimum. This is a FWD vehicle.