Our vintage van was retrofitted to use the newer 134a coolant at a shop in Seattle. (Interesting that the review below is also for a vintage vehicle!) A Goodyear mechanic did a Mickey Mouse fix on the rear air a few years ago, and this "fix" stopped working. Our local mechanic said he couldn't figure out what was going on and that no one had parts that would fit. Although B&M is a bit far, his shop specializes in radiators and A/C and he has excellent reviews on line, so I told my husband that I wanted to give Grant's shop a try. I was really surprised to receive a call this morning that Grant could fix the A/C. He diagnosed the problem and we can pick up the van this afternoon. Grant is an honest gentleman. He said exactly what needs to be done and quoted a fair price upfront. I am very impressed by his knowledge and professionalism and would highly recommend him.