You can get little packets from the dealer, and maybe atlantic british too. They are the right size to lube the swivels so you don't overfill.

I would change the front and rear differential fluids, along with lubing the swivel ***** ASAP. All it takes is a 1/2" square drive ratchet to get the plugs off. Should be one on the bottom to drain, and on on the front to fill. Just fill to the hole. The transfer case is the same, but a little tricky to get to, and you have to use a pump to get the fluid back in. No way to pour it in. Give your front and rear driveshafts a shot of grease while you are under there.

Use Synthetic oil in all of your driveline components. They did not come out with synthetic in 98. Also, check for little metal particles in the oil. It sounds to me like you may have a bearing out in your driveline, or something doesn't have any oil. I would check and change all of your fluids as soon as you can, because if something fails, it will cost you big.

 

Thanks!

BTW I've been searching for that seafoam at Wal-Mart, Canadian Tire and Napa and they don't have it. What does the bottle looks like? Can I use other similar stuff instead? Seafoam is a gas additive right?

 

This stuff works better.
http://www.autobahnpower.com/products.asp?recnumber=542
Marvel Mystery oil works good too.
SeaFoam comes in a metal can.
Ask NAPA to order it for you.

 

If you are looking for a gas additive, use BG 44K. Use Seafoam for the induction cleaning. Do a search on here for more info.