What happens when we change redirects to pass linkjuice to different pages from backlinks? Google's stand?

[vtmoz]

Hi Moz community,

We have employed different pages (topics) at same URLs for years. This has brought different backlinks to same page which has led to non relevancy of backlinks. Now we are planning to redirect some URLs which may improve or drop rankings of certain pages. If we roll back the redirects in case of ranking drop, will there be any negative impact from Google? Does Google notice anything about redirect changes beside just passing pagerank from backlinks?

Thanks