The hell tranny do I have?

[Dirty Rockstar]

I have the 4 spd. w/ OD.. I think its the 4T60.. Also, how hard is a 5 speed swap on my 90 Lumina? My tranny is goin, and if I need to replace it, a 5 speed is goin in..

[digitaloutsider]

Yes, yours is the 4T60.