I have a 1999 Infiniti I30 that has a transmission slipping in every gear. It only kicks kicks in when I rev it past 2500 RPMs in any gear and I lose it again when I come to a stop or making turns. Is this an indicator for a replacement or something less major? I found a used tranny on eBay for 375.00 that has 56K miles. It was involved in a wreck but the tranny is good to go. Should I purchase that or go somewhere reputable like Aamco and pay much more? How much do you think it would cost me for a used or rebuilt tranny replacement at Aamco?

