I have a 5 speed manual trans and it seems to b slipping.

You may have a worn out clutch. Take it to a reputable mechanic to have it checked to make sure you don't have leaking hydraulics or linkage problem for the clutch system. Kind regards, Stephane Grabina BMW Excluservice Rockville, MD 20852 www.bmwexcluservice.com

I agree....have your CLUTCH checked out. Your clutch, as you know, should be "firm" when you push it. I can tell you, a new one is very expensive. Also...might have your "Transmission Fluid" checked. If the mechanic finds that the fluid is dirty and has debris and/or metal shavings....need to change it out....not a huge cost. I just changed my Transmission Fluid.