Jacks Transmission upgrade, worth it?
...Jack said that the clutches weren't actually that bad. He thought my problem was with the TCU. It has some kind of gel coating on it that is supposed to protect it inside the tranny and apparently (unlike what many have said on the forums) using any fluid other than OEM or the SSP Gold will degrade the gel on the TCU. When I changed my tranny fluid last Jan, I used the FFL-2. I did HOURS of forum research before pulling the trigger and believed it was better than the OEM fluid. Now I know. So for reference, don't use anything other than OEM fluid or SSP Gold unless you don't mind replacing a $2000 TCU.
Hello everyone. I figured I'd better chime in here:
I'll try to update here and on my forum section when that happens.
We put a lot of R&D into these units this year and we hope it not only pays off for us, but allows those which want a nice upgraded trans to now be able to do so within their budget.
Thanks!!
Jack
- We make our own clutch packs.
- We are changing the website this week to reflect new products and services which we were testing these past few months.
- Prices are going to drop.
- More software options for those of you with Ralliart and those which want the latest updates.
- Possible tune installed and included for your build to assure the clutches work for your goals like they are supposed to (almost done with this).
I'll try to update here and on my forum section when that happens.
We put a lot of R&D into these units this year and we hope it not only pays off for us, but allows those which want a nice upgraded trans to now be able to do so within their budget.
Thanks!!
Jack
Sorry to bring up a older post but I would like some more info on the tune part obviously for the ralliart perspective.
Have you guys been able to crack anything tcu wise or is this entirely a tune on the ecu side of things for your rebuilt transmissions. Could you please elaborate on ralliart options with updates. It would be fantastic to know someone has cracked the tcu

Thankyou
I have had my 500 hp clutches from jacks for almost two months and am happy with the transmission but did not have the best experience with the company itself. I had a turnover time of more than 2 months and partially that is from bad timing but still way too much and I was also charged a price 1200 more than what they charge now less than a month before they lowered the prices :/
I have had my 500 hp clutches from jacks for almost two months and am happy with the transmission but did not have the best experience with the company itself. I had a turnover time of more than 2 months and partially that is from bad timing but still way too much and I was also charged a price 1200 more than what they charge now less than a month before they lowered the prices :/
I am very sorry to hear about the long turn-time and pricing change hitting you negatively. At the time your trans was here, a lot was going on and we had been a bit overwhelmed. We would like to make you happy with us again so please email me direct at shop@jackstransmissions.com and I would like to find a solution so you are 100% happy with us.
Yes, I lowered pricing not too long ago. It seems like every few months we offer something new for the SST, so always feel free to check in with us.

Thanks all!
Jack
Hey Jack!
I've got my MR coming to your shop April 30th for 600hp clutch upgrades.
Do we need to run a teach-in after the new clutches are in? I.e. going to the dealer and using MUT-III tool to relearn?
Do we need to do a teach-in if the whole tranny is worked on?
Is there a break-in period for the clutches?
Thanks!
I've got my MR coming to your shop April 30th for 600hp clutch upgrades.
Do we need to run a teach-in after the new clutches are in? I.e. going to the dealer and using MUT-III tool to relearn?
Do we need to do a teach-in if the whole tranny is worked on?
Is there a break-in period for the clutches?
Thanks!
Hey Jack!
I've got my MR coming to your shop April 30th for 600hp clutch upgrades.
Do we need to run a teach-in after the new clutches are in? I.e. going to the dealer and using MUT-III tool to relearn?
Do we need to do a teach-in if the whole tranny is worked on?
Is there a break-in period for the clutches?
Thanks!
I've got my MR coming to your shop April 30th for 600hp clutch upgrades.
Do we need to run a teach-in after the new clutches are in? I.e. going to the dealer and using MUT-III tool to relearn?
Do we need to do a teach-in if the whole tranny is worked on?
Is there a break-in period for the clutches?
Thanks!
No need to perform a teach-in. Just make sure you have a very good tuner that knows how to tune the SST for that power range. If they don't get it just right, it can ruin the trans very quickly.
I will, however, recommend the latest SST update for your trans if you have that available to you. It does a lot of good for performance applications.
We have found a way to manipulate the valve-body to be able to up the pressure without the need for a tuner, but we are still in the test-phase of that right now. If this works, then the SST won't be so sensitive to slip by someone which may not know what they are doing with the tables. Our most common failure is burned clutches due to a tuner which doesn't understand how their tune is affecting the SST clutch engagement. I am trying to eliminate that issue by supplying a valve body that will be able to do what it needs to do without software interference.
The SST is a complex trans, so there are always more improvements as time goes on.
Jack
Jack, if I want my car to make 450 whp on a stock frame turbo, do I need 500 hp or 600 hp clutches? Also in your experience do you think the quick spool and high-ish HP of stock frame turbos are rough on the SST?
We have found a way to manipulate the valve-body to be able to up the pressure without the need for a tuner, but we are still in the test-phase of that right now. If this works, then the SST won't be so sensitive to slip by someone which may not know what they are doing with the tables.
From the other evo forum originally posted by EvoXforum member Mash.
1. BEFORE 15 bar
Same car AFTER 20 bar
Unless the software is re-written, this is highly unlikely unless someone wants a car that drives like *** everywhere other than WOT.






