Got buick back from the shop and somethins wrong...

[87gnstock]

I just got the regal back from the shop. It had a K&N intake put on, along with a Jay Carter chip and a new adjustable fuel pressure regulator with a new fuel pump. The first time i had it past 15 psi, the transmission seemed to jump when it shifted and a clunk came from under the car. I immediately let off, and everything was normal. What could be the problem? I tried it again at only 5 psi, but it didn't do it really...

 

[Joe 1320]

Motor mounts or tranny mount might be broke. Better start crawling around under there and check her out.