General Maintenance

[zr1343]

I changed the trans fluid with 10 tws 60 Castrol.
Replaced a leaking slave cylinder and bled in new clutch fluid.
While I am under there I will be replacing the rear diff fluid. I was thinking of trying redline but I think I read that you should not use the GM posi fluid with Redline. Use Redline friction modifier instaed. Anyone heard this ?
Whats the best rear diff fluid to use for a ZR1 driven on track days?

[karterdon]

Mobil-1 for the rear end. As for the Trans - I would have suggested - Amzoil - It meets the GM requirement - It is fully synthetic and you shift will be very smooth.