Automatic transmission won't go in reverse

Common causes of this problem are a blown sealing lip on the reverse servo, worn reverse booster valve/sleeve or a partially blown channel plate gasket. - See more at: http://etereman.com/blog/uncategorized/a-history-lesson-on-the-gm- 4t65e-transmission-and-discussion-of-some-common-problems-and- their-cures/#sthash.8c3pNAh6.dpuf

The rear sprag could be a problem too, as it has to hold the low/reverse pack, but only in reverse. It freewheels in forward gears.

Why do my 2000 chevy impala only going in reverse

why does my 2006 impala only goes in reverse and netrual

Same here it goes in neutral and reverse forward ! ..2009 check impala any help..?

Omg I guess chevi has alot of tranz problems ,.. mines a 2009 check impala lost reverse but goes forward even on neutral exept reverse ,.. gas pedal feels lose ,... Was driving on the high way n I heard something popped under it ,.. what could it be ??? any suggestions ;!? Ty...

2010 impala won't reverse