Here's why it's dangerous and what you should do instead:
* Internal Damage: A completely dry transmission likely means there's a leak or significant internal damage. Running a transmission low or dry can cause catastrophic failure, leading to costly repairs or a complete transmission replacement. The fluid isn't just lubrication; it's crucial for cooling and hydraulic operation.
* Finding the Leak: Before adding any fluid, you *must* find the source of the leak. This requires inspection of the transmission pan, seals, lines, and cooler. A mechanic can diagnose this properly.
* Incorrect Fluid Type: Using the wrong type of transmission fluid can severely damage your transmission. Your owner's manual specifies the correct type (likely ATF+4 for a 1999 Ram 1500, but verify!).
* Fill Procedure: Even if you find the leak and fix it, filling a dry transmission is more complex than simply pouring in fluid. You need to add fluid slowly while checking the level using the correct method (typically a dipstick, though its location and use vary depending on the transmission type). Overfilling can be just as damaging as underfilling.
What you should do:
1. Don't try to add fluid yourself unless you're experienced with transmission repair.
2. Have the vehicle towed to a qualified mechanic or transmission specialist. They'll diagnose the problem, repair any leaks, and properly fill the transmission with the correct fluid and amount.
3. Provide them with your vehicle's information (year, make, model, engine size) to ensure they use the correct fluid.
Attempting this yourself without the necessary knowledge and tools could result in significant damage and expensive repairs. It's always better to err on the side of caution and seek professional help.