There shouldn't really be more than a couple degrees of movement. If there is pull it back out and make sure the retainer pin for the drive gear is firmly in place and that the gear has no play on the spindle. The O-rings I'd just buy from Toyota... There are only two and the should be inexpensive.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|