went out to get new tranny in and seem to be having shift issues? tranny is new ahp..installed into cases with provided thrush washers in place.bolted cases together and stood motor upright. while spinning drive gear shifted trans by moving shifter arm.works smooth one time and not the other? don't want to get it all together and have issues. lookin for suggestions.has kicker in place with return spring. shift cog mounted to trans and arm placed under washer to work with pins.bolt tight thru shifter lever side of case.small roller arm and spring installed.