Re: 1998 SX Drive Question
If this is the screw you are referring to, it's not part of the drive, it's actually in the pivot housing. It's a water drain. It's a hold over from when Volvo and OMC were doing the joint venture. Once OMC was bought out, it went away.
With the old OMC Cobra drives, it was needed to drain the water out of the housing, but with the Volvo SX drive, there is no water pump to deal with and the water drains out by putting the drive all the way down.
Has nothing to do with gear lube.
