60k service

[tach06]

I am getting ready to do the 60K service on my 03 LS. The maintenance guide recommends changing the automatic transmission fluid on vehicles equipped with AX4S, 4F50N, 4R100, 4F27E. Does anyone know which one, if any of these are the transmission in my LS? Or is there a way I can find out? Thanks

 

[ToddG]

Yours is none of those, it is a 5R55S (synchronous shift). The transmission is sealed and the fluid does not need changing until 100K miles. Now I know there are some folks here who have changed their trans fluid earlier than that, but it is not necessary.

 

[tach06]

Thanks for the info. that will save me a few bucks