Will this post a problem as duplicate content?

I have domain let say abcshoesonlinestore.com and inside pages of this abcshoesonlinestore.com is ranking very well such as affiliate page, knowledgebase page and other pages, HOWEVER i would like to change my home page and product page to shorter url which abcshoes.com and keep those inside page like www.abashoesonlinestore.com/affiliate or www.abcshoesonlinestore.com/knowledgebase as it is - will this pose duplicate content?

This is my plan to do it: the home page and product page will be www.abcshoes.com and when people click www.abcshoes.com/affiliate it will redirect 301 to abcshoesonlinestore.com/affiliate HOWEVER if someone type abcshoesonlinestore.com or abcshoesonlinestore.com/product it will redirect to abcshoes.com or its product page itself (i want to use 302 instead 301 (ASSUMING if the homapage or product page have manual penalization or anything bad we want to leave it behind and start fresh JUST assume because i read some post that 301 will carry any bad thing to new site too)

The reason i do not want to 301 from abcshoesonlinestore.com to abcshoes.com is because those many pages is ranking top 3 in GOOGLE ( i worry will lose this ranking since this bringing traffic for us)

Is this good idea or bad idea or any better idea or should i try to see the outcome - the only concern is from abcshoesonlinestore.com to abcshoes.com will pose as duplicate content if i do not use 301 - or can i use google webmaster tools to remove the home page and product page for abcshoesonlinestore.com can we tell google that?

PS: (home page and product page will have new revise content and minor design change) but inside page will stay the same design

It's no problem for duplicate content because of you have rights for both sites and you are moderator so you can use 301 redirection for that.

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Dup content is explained very well in Google's webmaster guidelines and the dup content penalty will happen if you have the same content on different pages of your website.....WHEN....you begin to use the dup content on your pages to rank in search engines is when you could get the penalty.

You can have site with 100 pages of the same content, but if you read Google's WG's it says Google doesn't really care about the dup content on the pages until you use the content to rank or manipulate the search engine results.

For example, if you have a home page with the exact same content on another page and you rank the home page for keyword to number one or three, and the you take the other page with the same content and use a keyword in the sub-domain to rank it high in the search engines with the same content, that is when Big G will look into it and possibly, highly likely, give you a dup content penalty.

Let me make sure I understand your situation correctly. After you implement the 301 redirects, abcshoesonlinestore.com's home page and product pages will redirect to abcshoes.com. And the affiliate/knowledgebase pages will remain on abcshoesonlinestore.com. Based on that setup, you don't have a duplicate content scenario... unless the exact same content will be served from abcshoesonlinestore.com/affiliate and abcshoes.com/affiliate.

Quick clarification about the duplicate content "penalty." It's not actually a penalty. Google will choose the primary version from a collection of duplicate pages (and typically put the other copies in the supplemental index), but it doesn't truly penalize those non-primary pages (it's more difficult to rank with them -- but not impossible).

Two more comments based on things you mentioned... 1) Use a 301 redirect: not a 302 and 2) if you insist on keeping the two domains (instead of just redirecting everything to abcshoes.com), make sure you don't double redirect (i.e., abcshoesonline.com/affiliate -> abcshoes.com/affiliate -> abcshoesonline.com/affiliate).