how about some feedback on a tranny that slips going in to second and slips alittle more,but goes alright on the freeway;also it shifts fine manually.fluid is up.but im going to change it today;is their a filter to change as well?any help will be surely appreciated.o yeah ive got 396w/cam roller/rockers headers,msd,34oo stall w/oshift kit.....would shift kit help?thanx.