Re: Installed PML diff cover with Redline oil & smoother?
Dex 6 is a lower viscosity than Dex 3, so if your tranny requires it - I wouldn't use anything else in it. Redline suggested for me to stay with GM Dex 6 as it is not compatible with my tranny, rather than sell me their oil. They even said the GM Dex 6 is a very high grade fluid etc.
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