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Pampered-Z · 05-20-2005, 10:14 PM

I use Royal purpal and find it much better in that the trans shifts much smoother during the winter when it's cold. Check it yearly, change every 2 years to be safe.

Also, you should change the differential fluid every 30K miles. If you race then do it every 20K/year. Make sure you always use fluid that is for posi's, and always add a bottle of GM posi-rear fluid so you don't burn up the posi unt! I've used the semi-synthetic for years with no problem.

05-20-2005, 10:14 PM	#6
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	I use Royal purpal and find it much better in that the trans shifts much smoother during the winter when it's cold. Check it yearly, change every 2 years to be safe. Also, you should change the differential fluid every 30K miles. If you race then do it every 20K/year. Make sure you always use fluid that is for posi's, and always add a bottle of GM posi-rear fluid so you don't burn up the posi unt! I've used the semi-synthetic for years with no problem. __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!!