So I have this 1991 shortbed 1/2 ton 1500 series 4.3 V6 and 5 speed truck. Well the trans is making noise. And I know eventually its gonna need a rebuild. IS there a difference between the S10 5 speeds, the 1/2 ton 5 speeds or the truck 5 speeds that came installed behind V8 or V6's. I have the Getrag 5 speed or 85MM trans according to the Chiltons book. Can I easily swap in another type of 5 speed? What kind of limits do these trannys have as far as towing? What other year truck 5 speeds will bolt right in with little or no modifications? Any of you transmission experts please help out.