Where can I find a cheap and good quality shop for volvo maintenance?

I just bought a 2000 Volvo S40 for a car dealer. However, the transmission(auto) slips under the situation that I accelerate the car from 55 miles to 65. My friend told me it is the problem of transmission. Where can I find a reliable maintenance shop on deling with volvo cars in Dallas, Texas?|||In the world of automotive good and cheep don't go together your better off looking for an honest and experienced German car mechanic . you need more then maintenance your trans is slipping most likely because the clutches are wore out and the trans needs to be overhauled or replaced by some that know what there doing and will give you a nation wide warranty if possible.|||Go to yelp.com and put it car repair and you city and state. You will find the best places per customer reviews.