In my long struggle to keep my tailshaft splines lubes to reduce slip-bump in my truck I've found it necessary to clean the male shaft which resides within the transfer case. No issue replacing to fluid afterwards to avoid contamination but I'd like to avoid any cleaners which would damage the seals.
What would be safe for the shaft seals while still functioning to clean off synthetic Teflon grease? My ability to mechanically clean with, say, a tooth brush is extremely limited on the male shaft.
2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop