tranny toubles

Well being that yours has the 3650,its kinda expensive for the rebuild.But would be cheaper if you pulled it yourself and dropped it at a shop.I did the same with my 01 gt with a t45 and it cost me $400 for the rebuild.There is a site that sells rebuilt 3650's for $945,smallpartsauto or something like that.promotionperformance sells them for about $1250 or close to it,of course these are stock rebuilds with any TSB's applied.Any good tranny shop should tear it down and give you a quote for the actuall repair for free.Im guessing you have a bad synchro,thats what happened to my 2nd and 3rd gears in the GT.

Also if you buy a used one you would be looking at least $500 and most likely it wont last very long at all,from my past experience anyways.and Im sure most here will agree.