LEXUS SC430 OWNER'S MANUAL Pdf Download. Lexus SC430 Owner's Manual Automobile Lexus SC 430 2006 Owner's Manual (352 pages) Automobile Lexus SC430 2006 Quick Manual Topic 3 When Driving Automatic Transmission Shift range positions Parking and engine starting Reverse position N Neutral position D Normal driving position Sequential mode driving Switching out of “P” position Sc430 Transmission - 01 - 10 Lexus SC430 - Lexus Owners Dec 16, 2011I have a 2005 SC430 and the service manual says the transmission is sealed and never needs service. I have 79000 miles on it and believe I should have the fluid changed anyway. I can't imagine it will hold up indefinitely. Lexus of Portland (OR) says "no need". Any comments, suggestions or experiences with this anyone? Thanks in advance.