[RH152]

GTOi dont build trannys but you also have to drill holes in the high gear drum to releive pressure or you can blow the snap ring out i use Select performance for my transmission worki have a turbo 400 in my 11sec firebird took it out of my grand am 5yrs ago has over 1000runs still going .use ATI converters last one had 8 yrs of use before select rebuilt it hope ths info helps

pure pontiacpowerd 86 grand am
455 eheads hyd. cam 9.24 at 145