Got a trans from pick n pull today from a 99 OBS that I'll be putting in soon after the new clutch arrives. Visually it looked pretty good. The car it came from seemed well maintained and was involved in a front end collision. (Following the rule that it probably drove itself to the accident)

 

No leaks. The gear oil smells good and is still honey colored. (I take that as a good sign) No wiggle to the shaft inside the bellhousing. trans is about 180k. I've swapped a few trannies, but done no real work to one. Anything else I should do/check before I install it and cross my fingers?

Make sure it engages all the gears. You've pretty much covered everything else.