Jeep: transmission service, grand cherokee, synthetic fluids


Question
I own a 1999 Grand Cherokee. I have 68000 miles. Should i replace the trans fluid with synthetic? Also one dealer says they can replace ALL the fluid without the flush machine and another dealer said dropping the pan and replacing the filter was good enough.  I have read that the 2nd method only replaces 1/2 the fluid.  What is the best way to service my JEEP ?  Thanx

Answer
Personally, I would have the system flushed.  The jury is still out on synthetic fluids, some swear by them, others don't think they are worth the money.  I use the original stuff and get by just fine. (but I do use a little Sea Foam in my transmission and think that helps)