hi,,ive had early cast iron trans with broken reverse bands and the rest of the performance was fine,,the most recent one was a 60 chrysler with a 383,,no reverse,,broken band,,replaced band ,no other changes,,corrected problem,,that was 2 years ago,,still running fine,,,.you can replace bands and clutch packs in the car with out pulling the trans,,takes 2to3 hrs,,cast iron transes only,,,..rick