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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
If you want to stay GM, you need to get the manual transmission gear oil. It is Dex3.
This is a debated topic with opinions all over the place..... Just like everything else. I just went through this exercise and got all kinds of comments. Amsoil was highly touted. The RP, not so much. Lot's of mixed views on it.
I ended up staying with GM fluid.
And you're not an idiot. It took me ten minutes to convince the GM parts counter guy that Dex 4 was not for my vehicle and that GM still made Dex3.
I get my RP and look up where exactly the drain plug is in the service manuals...even though the owners manual states to use III the service manual states to us VI.
I put the RP in mine and could barely shift it. Switched it out for the Ames Oil and very smooth after that. This was at about 4K miles on the car.
2007 ZO6
..and of those so many transmissions, how many are repeat customers, and why??
I too tried RP, solely based on RPM's recommendation, was not impressed; running Amsoil now and so far, so good.
There are many loyal RPM customers. In my experience, moreso than most trans rebuilders. It seems the people who hate RP rip it out immediately, they don't generally complain about it 10k miles later when something grenades in the trans.
FWIW, RPM also told me they recommended Torque Drive. I told them I used Joe Gibbs STF and they said that was "probably fine too". I don't think RPM has a vested interested in forcing people to use RP.
There are many loyal RPM customers. In my experience, moreso than most trans rebuilders. It seems the people who hate RP rip it out immediately, they don't generally complain about it 10k miles later when something grenades in the trans.
FWIW, RPM also told me they recommended Torque Drive. I told them I used Joe Gibbs STF and they said that was "probably fine too". I don't think RPM has a vested interested in forcing people to use RP.
Good feedback. Ask them about running Redline - they specifically said do not run Redline in diffs, and I've already proved to myself it doesn't work well in the 2011 trans (although in my T56 in the C5 it worked great). They claim the issue was lack of wear protection.
06-19-2017, 10:20 AM
