I have a 4l60/700r4 in an 81 full size pontiac. 400 cid with 11-1 pistons and a low rpm rv type cam. Rear diff is 223-1 ratio. 1275 rpm @ 60 mph. Is there any fix for a hard shift into 2nd esp. when cold? Trans was rebuilt about 75 k miles ago. recent service ... Login to read more.