FoMoCoMoFo16
Well-Known Member
- Joined
- Jun 17, 2019
- Threads
- 6
- Messages
- 48
- Reaction score
- 4
- Location
- TriCities WA
- Vehicle(s)
- 2016 GT 2003 Cobra
2016 GT PP and mine is on point.
Sponsored
Do you mean literally blowing up lol? Ive done the vacuum procedure for 8 hours on my master reservoir. Made no difference. Still having issues getting the trans out of gear under decel. No shim is provided with the kit. I'm not questioning Geoff's integrity, he's been helping me try to work through it but I've found about 5 people that have had this exact same issue so there should be a common consensus on the fix.You need to figure out if you're blowing up your slaves. Might need to bleed them better or possibly missing a shim behind the slave. If Geoff says the clutch itself is good it's good. He's a stand up guy and extremely helpful in my experience.
Did you actually experience these issues in the mantic's you installed?While slave cylinder is always a factor to be checked and proper bleeding is a major factor, it's not the only thing going on here. I'm guessing you put in a 9000 series (organic or ceramitallic doesn't matter) and if that's is the case, it is an extremely light setup with small diameter discs and it is slowing its rotation much quicker than a stock or near stock setup. This is excellent for racing applications where off throttle is helpful in slowing the car down but not so helpful on regular street driving applications because as you decide to switch from gear to gear, while letting off the accelerator, it is already trying to slow the engine due to lack of inertia causing tension pressure between the engine and transmission with the clutch being the gateway . This is part of the problem of the resistance in the shifter coming out of gear in casual shifting. Stock or near oem replacement clutches factor this in especially for the masses of daily driving a car. Don't get me wrong; I absolutely love the Mantic clutches and have installed three of them including my car and they are all the smoothest, noiseless and soft pedal actuated I've been around and its not a small thing. I unfortunately had to change out of my Mantic when I switched to the Tremec Magnum XL with a 2.66 first gear as I needed the weight and mass to help drive that trans better.
See if slightly aggressive/exagerated(?) shifting on the street helps your situation.
Interested to see if the spacer helps at all.
This has happened to two of my TOBs now with the mantic twin and t56 mag pairing. I did a measurement the second time and it came in a little under spec at .450” of tob preload distance, whereas it should be at .500-.650”
I will be pulling the trans again and adding a .100” spacer to see if that resolves the issue.
Other symptoms I’ve experienced:
1. Difficulty engaging first and reverse (never locked out or anything but just not easy).
2. Slight grinding noise when trying to enter a gear like 1st or reverse when at a stop or when coming to a stop and downshifting. Also grinds if I extend the clutch pedal really hard to the floor.
3. When starting the car, I sometimes have to press the clutch pedal very hard, like there is a little barrier I have to get past to get the switch to activate. I can feel a pop in the pedal that has to be overcome; the green light on the start button won’t light up until I do this.
4. I can’t quick shift at high load; it will lock me out. Like hitting a wall.
If these issues aren’t resolved with the spacer, or at least mitigated somewhat, I’ll be switching to a McLeod RXT I have laying around.
Yeah looking at the Spec twin, RXT or Lethal TwinThat sucks and has to be completely frustrating. Of the three I’ve installed, they are still in the road and they never talk about it so they must work flawlessly for them. Sometimes it’s just a bad go with whatever car.
Did you consider Tilton? Centerforce? Going back to McLeod?
Just heard from mantic this:I'm starting to think my master cylinder is slowly dying. Still don't have any issues power shifting but occasionally I feel some resistance driving around town. I'll try to remember to update this page after I figure out what I'm going to replace it with. Hoping to find something better than stock maybe a GT350 master cylinder if it's not identical.