1995 Jetta III Celebration Edition (A) Acceleration Issues

[gooogle]

Hi Folks,
I am newbie here from Randolph NJ.
I bought Jetta year back with 70k miles on it. It has served me very well for my office commute. Over many months I have started to love this car.

Recently my Jetta started to make noices when I am accelerating in lower gears. (It is Auto Trans), but it runs smoothly when it picks up speed.

Please guide on the probable problems it may have and estimated cost for resolving the issue.

Thanks
Gooogle