I have a 1988 Celica GTS with a 5 speed and a 3SGE from an 86/87 GTS Celica. Second's syncro is destroyed, need to keep my hand on the shifter to keep it in. 4th grinds going in when driving longer than 30 minutes. Where would I get the supplies to rebuild my transmission and about how much would this be? Could I swap in a new transmission, if so from what cars? The thought of having a 6 speed sounds nice but anything that is in better condition would be great. Any recommendations? If I did get a new transmission, would I get new clutches and half-shafts for my car or for the car the transmission came from?