Transaxle Fluid
 

Even though the factory fluid in these cars have a synthetic mixture, has anyone logged a number of miles on a full synthetic such as Red Line, Royal Purple, etc to see if there is any harm in changing over. Thanks for the info.:usa:

I'm about to change mine over to Royal Purple Syncromax this weekend, I'll keep everyone updated.

A buddy of mine rebuilt a 1998 Corvette from the ground up, it was a salvage title car that was in collision. He just swtiched his 6 speed to Royal Purple and the increase in shift smoothness was noticable even to me as I have driven the car several times before and after the transmission fluid change.

My buddy swears by the stuff, he had it in his 6 liter GTO and CTS-V.

I ran Mobil1 synthetic ATF in my '03 Sunfire (F23 Getrag) for 3 years with no problems. Shifted smoother during cold winter weather than my Cobalt with factory fluid does now (same tranny). I will probably make the switch this spring.