Did Jack ever write anything up?

 

Sorry for the slow response to this. I have been playing with different fluids in my personal test-mule and found the ffl fluid is not the same as the factory stuff. My trans developed a leak at the main seal where the t-case mates to the trans, and had an odd slipping issue in 4th gear when cold.

I then switched back to the factory SST fluid. The oil leak stopped and the 4th gear issue was gone.

I plan to spend more time on fluids here soon, but so far the only fluids I found which do not cause leaks and allow the clutches to work properly have been factory Nissan GT-R DCT fluid, SSP Gold, or OEM factory SST fluid.

There is something about those 3 fluids which have an ingredient we call the 'slime' coating. If you use a fluid in your SST which doesn't have this odd slime coating to it, the seals will leak. I have been unable to explain what this stuff is, but it's something the SST apparently needs. I know in the GT-R world this is not needed and many people are now using ATF in their GT-R, but the SST seems to get very upset if you do this.

For kicks I tried ATF in a known good SST and several quarts of the fluid leaked out of the seals in the trans. Again, I reinstalled the OEM SST factory fluid and the leak stopped. i never touched the seals. They leaked on their own with the new fluid I would try, then stop any time I went back to the OEM fluid.

So far I have played with ATF, engine oil, Nissan GT-R, Pentosin, SSP Gold, ffl and OEM SST fluid in the trans and all seem to make the unit run differently. Oddly enough the best fluid for shifting was straight Shell Rotella T engine oil, but everything else got pissed off with it in there.

I want to try to retest all of these fluids again with a fresh and rebuilt SST to see what happens. The SST I did these tests in previously was a factory untouched unit with a lot of miles.

Jack

 

Good info!

 

Thanks a lot for the update! I'll stick to the Diaqueen SSTF fluid.

 

Since switching to FFL2 during the last fluid/filter change it seems the SST has gotten lazy in S-Sport, I re-protuned and switched to FFL2 at the same time ... so I suspected it was the updated SST tune ... maybe thinking it might be the FFL2. It shifted hard and sharp as hell right before making the change to the Pentosin. Will go back to the Diaqueen SSTF and see what the verdict is.

 

Thanks Jack! Guess I'll stick with Diaqueen after all.

 

For all those disheartened by the price of OEM SST fluid, were doing better than Japan. Its 37,000Yen for 8 liters from the dealer in Japan.

On a different note, has anyone used the HKS DCT fluid?

 

Yes and they aren't as good as the Mitsubishi's Diaqueen. Had issues with DTC error codes and slippage.

 

So I'm about to do my sst fluid change over to ffl2 and the ssp reusable filter, curious how many people are doing the mineral oil flush vice the straight dump and refill

 

The recommendation is not to switch to ffl2

 

I did the mineral oil dump when I had issues, it cleaned up the transmission really well.

 

I'm going to stick with the Diaqueen. Dealer service department quoted me about $465 to do the flush and said labor is $80 of that estimate. I got quoted about $355 for the 8L of Diaqueen & OEM filter from the parts division of the same dealer (who has been acknowledged as a good resource on multiple forums), so it doesn't sound like there is much savings to be had when it comes to parts on the job. Since I'm strapped for time I will be content if I can get it all done for around $450.

 

You can get the DiaQueen from fredbeans for like $120 for four liters. Thats over $200 less than you were quoted.

 

your going to pay premium for anything from the Dealer.

 

The 355 quote is from Fred Beans parts, so at 120 a container that makes the filter 115....