Tires: tires, toyota camry v6, toyota camry

Question
Is there any problem with putting on my '99 toyota camry V6 auto, tires with
a T rating when the manufacturer calls for a H rating as long as I replace all 4
tires

Answer
Mary,

Tires with higher speed ratings tend to handle a bit better, which is one of the reasons car manufacturers will specify H, V, and higher speed rated tires.

But there is also a safety issue.  Higher speed rated tires have more capability and since you would be using less of the tire's capability, it is less likely to fail.