Tc-sst failure over mods?
May 27, 2011, 03:06 PM
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Tc-sst failure over mods?
It seems like most people who are having tranny problems are a result of faulty transmissions from the factory... Has anyone blown up their tc sst from over modding? There's is an MR I've see With over 500whp and 400lb on stock clutches, just was wondering what you guys have came across, I know alot of us are hesistant to mod heavily and blow up our $10,000 tranny. Particularly the EVO guys, any horror stories you'd like to share.
May 27, 2011, 05:19 PM
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May 28, 2011, 04:53 AM
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Now I see; 500 HP doesnt mean a whole lot on a Dynojet plus note... hes only got 318 LB TQ. So on the Dynocom hes got to be way under 300 TQ. Its TQ that moves the car not HP. Its high TQ thats the issue with the stock clutches.
I have been told by the powers that be at SSP and other sources that the TQ limit on the factory clutches is somewhere around 400. Im at 390 HP and 370 TQ now with gas tune from COBB. Thats why I upgraded to the 600 HP clutch kit. Im going for a e85 tune next week.
The real issue I was having was in normal driving mode I would get pretty severe clutch slippage. In sport mode I got about a 1 second delay in a power fall off at the top of the RPM's while the car shifted. The odd thing was in manual mode it shifted better with maybe only a .5 second power drop.
After installing the 600 HP kit I notice slippage still in normal mode while gunning it hard but the down shift is instant. In sport mode the power fall off is .5 seconds now and in manual mode there is none.
I'm pretty sure the real lack of being able to hack the TCU is causing the computer to want to give the driver a SMOOTH ride. I have no doubt that between TEPHRA and COBB since they are working together that they will get this fixed. Getting the clutches to grip more is a function of getting those DCT seals to push harder. Since the SSP ones are made of Viton and not rubber like the factory, I think a good TCU hack will make this happen.
On a side note at 25K miles I did the 600 SSP kit. The factory clutches looked almost brand new with little if any wear and there were only two very small, ( like less than half of a pinky fingernail size) burn marks on the steels.
I have to also note I have gone overboard on making sure the tranny is well cared for. I have changed the tranny filter 4 times every 7500 miles plus done TWO complete fluid changes. I am also using the AMS tranny cooler. I took the attitude that it was better to spend 300 bucks for a complete cleaning very frequently rather than a 10K new tranny. I have monitored the fluid pretty closely and its never burnt or smells that way.
I have been told by the powers that be at SSP and other sources that the TQ limit on the factory clutches is somewhere around 400. Im at 390 HP and 370 TQ now with gas tune from COBB. Thats why I upgraded to the 600 HP clutch kit. Im going for a e85 tune next week.
The real issue I was having was in normal driving mode I would get pretty severe clutch slippage. In sport mode I got about a 1 second delay in a power fall off at the top of the RPM's while the car shifted. The odd thing was in manual mode it shifted better with maybe only a .5 second power drop.
After installing the 600 HP kit I notice slippage still in normal mode while gunning it hard but the down shift is instant. In sport mode the power fall off is .5 seconds now and in manual mode there is none.
I'm pretty sure the real lack of being able to hack the TCU is causing the computer to want to give the driver a SMOOTH ride. I have no doubt that between TEPHRA and COBB since they are working together that they will get this fixed. Getting the clutches to grip more is a function of getting those DCT seals to push harder. Since the SSP ones are made of Viton and not rubber like the factory, I think a good TCU hack will make this happen.
On a side note at 25K miles I did the 600 SSP kit. The factory clutches looked almost brand new with little if any wear and there were only two very small, ( like less than half of a pinky fingernail size) burn marks on the steels.
I have to also note I have gone overboard on making sure the tranny is well cared for. I have changed the tranny filter 4 times every 7500 miles plus done TWO complete fluid changes. I am also using the AMS tranny cooler. I took the attitude that it was better to spend 300 bucks for a complete cleaning very frequently rather than a 10K new tranny. I have monitored the fluid pretty closely and its never burnt or smells that way.
Last edited by Supraboy1; May 28, 2011 at 05:00 AM.
May 28, 2011, 11:35 AM
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^^yeah.. I'd rather be safe than sorry too! But I'm no where near the tq that your car is putting down. So changing the tranny fluids every 7500 is a little over kill for me. Plus my tune is very conservative anyways. I'm just waiting for someone to be able to crack the t-ecu. That'll put my mind at ease with modding for more power and torque.
May 28, 2011, 11:41 AM
#12
Now I see; 500 HP doesnt mean a whole lot on a Dynojet plus note... hes only got 318 LB TQ. So on the Dynocom hes got to be way under 300 TQ. Its TQ that moves the car not HP. Its high TQ thats the issue with the stock clutches.
I have been told by the powers that be at SSP and other sources that the TQ limit on the factory clutches is somewhere around 400. Im at 390 HP and 370 TQ now with gas tune from COBB. Thats why I upgraded to the 600 HP clutch kit. Im going for a e85 tune next week.
The real issue I was having was in normal driving mode I would get pretty severe clutch slippage. In sport mode I got about a 1 second delay in a power fall off at the top of the RPM's while the car shifted. The odd thing was in manual mode it shifted better with maybe only a .5 second power drop.
After installing the 600 HP kit I notice slippage still in normal mode while gunning it hard but the down shift is instant. In sport mode the power fall off is .5 seconds now and in manual mode there is none.
I'm pretty sure the real lack of being able to hack the TCU is causing the computer to want to give the driver a SMOOTH ride. I have no doubt that between TEPHRA and COBB since they are working together that they will get this fixed. Getting the clutches to grip more is a function of getting those DCT seals to push harder. Since the SSP ones are made of Viton and not rubber like the factory, I think a good TCU hack will make this happen.
On a side note at 25K miles I did the 600 SSP kit. The factory clutches looked almost brand new with little if any wear and there were only two very small, ( like less than half of a pinky fingernail size) burn marks on the steels.
I have to also note I have gone overboard on making sure the tranny is well cared for. I have changed the tranny filter 4 times every 7500 miles plus done TWO complete fluid changes. I am also using the AMS tranny cooler. I took the attitude that it was better to spend 300 bucks for a complete cleaning very frequently rather than a 10K new tranny. I have monitored the fluid pretty closely and its never burnt or smells that way.
I have been told by the powers that be at SSP and other sources that the TQ limit on the factory clutches is somewhere around 400. Im at 390 HP and 370 TQ now with gas tune from COBB. Thats why I upgraded to the 600 HP clutch kit. Im going for a e85 tune next week.
The real issue I was having was in normal driving mode I would get pretty severe clutch slippage. In sport mode I got about a 1 second delay in a power fall off at the top of the RPM's while the car shifted. The odd thing was in manual mode it shifted better with maybe only a .5 second power drop.
After installing the 600 HP kit I notice slippage still in normal mode while gunning it hard but the down shift is instant. In sport mode the power fall off is .5 seconds now and in manual mode there is none.
I'm pretty sure the real lack of being able to hack the TCU is causing the computer to want to give the driver a SMOOTH ride. I have no doubt that between TEPHRA and COBB since they are working together that they will get this fixed. Getting the clutches to grip more is a function of getting those DCT seals to push harder. Since the SSP ones are made of Viton and not rubber like the factory, I think a good TCU hack will make this happen.
On a side note at 25K miles I did the 600 SSP kit. The factory clutches looked almost brand new with little if any wear and there were only two very small, ( like less than half of a pinky fingernail size) burn marks on the steels.
I have to also note I have gone overboard on making sure the tranny is well cared for. I have changed the tranny filter 4 times every 7500 miles plus done TWO complete fluid changes. I am also using the AMS tranny cooler. I took the attitude that it was better to spend 300 bucks for a complete cleaning very frequently rather than a 10K new tranny. I have monitored the fluid pretty closely and its never burnt or smells that way.
May 28, 2011, 12:02 PM
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May 28, 2011, 04:23 PM
#14
key with the stock clutch packs are tq and not hp anyways any clutch is the same. They can take more hp that tq. I can't see that vid at work but I'm sure I've seen it before. I'd be more scared of the motor at that point than the trans. looks like the lesson today is if you care for your trans it will return the favor.
Last edited by luvboost; May 28, 2011 at 04:29 PM.