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      08-29-2016, 03:15 PM   #1
allmotor_2000
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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DCT Transmission Build Project

With the existing power levels of 1000ft-lb torque and 1000hp and projected power levels in the 1500hp range, the DCT needs some updates. Given the success with the SSP clutches so far, I have decided to have Kris over at SSP build the DCT transmission.

Details, pictures and more info to follow but I wanted to start a thread up.

Like a few other people I also suffer from the Gearshift Rod 5-7 issue (not related to the clutch... rather something inherent in this transmission design). This is occurring on WOT 4th gear upshift to 5th gear where it throws a DTML and you effectively lose 5th gear until the engine is re-started. It is not fully clear what the root cause is, but there are theories. I expect taking the transmission apart and re-building it will shed more clues. I believe it is a matter of time more folks will start seeing this issue as the gears start wearing down.

Anyways, car should have the trans out this week and shipped over to Kris to work his magic.
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      08-29-2016, 03:40 PM   #2
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I'm really looking forward to this tread!
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      08-29-2016, 03:59 PM   #3
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[quote=allmotor_2000;20484708]Like a few other people I also suffer from the Gearshift Rod 5-7 issue (not related to the clutch... rather something inherent in this transmission design). This is occurring on WOT 4th gear upshift to 5th gear where it throws a DTML and you effectively lose 5th gear until the engine is re-started. It is not fully clear what the root cause is, but there are theories.QUOTE]

If there is no damage to the transmission gears, wouldn't the cause most likely be with the electronics? Since in the DCT the gears are already engaged before the shift, unlike the old 4 or 5 speed manual gearboxes, what mechanical malfunction would cause a DTML? Is the high torque twisting something it shouldn't? But with a restart all is well, so I wouldn't think there is any structural damage. Following this with interest also.
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      08-29-2016, 04:53 PM   #4
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Ram, I told you what to do on this.. You need to clean it inside, either by flushing oil through or magnets. BMW does NOT do this and they most likely replace the trans.
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      08-29-2016, 07:36 PM   #5
allmotor_2000
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Quote:
Originally Posted by lunden View Post
Ram, I told you what to do on this.. You need to clean it inside, either by flushing oil through or magnets. BMW does NOT do this and they most likely replace the trans.

Yes cleaning the magnets is part of the rebuild among other things. Any which way the tranny has to come out!
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      08-29-2016, 08:35 PM   #6
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      08-29-2016, 09:36 PM   #7
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Great thread... I liked similar threads done on GTR's so this soud be good and informative
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      08-29-2016, 11:48 PM   #8
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This is going to be an informative and straight forward transmission build for everyone to follow. We will document the entire build over a 2-4 week period. Trinity Auto will be doing the initial removal of the transmission within the next week. Our goal on this build is 1000ft/lb. torque. We will be installing some very new products that are not yet available. We have been doing some extensive testing behind the scenes.

We will also show you how to do some of this preventative maintenance to save yourself some dollars from the dealerships.

SSP
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      08-30-2016, 12:24 AM   #9
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      08-30-2016, 01:35 AM   #10
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Quote:
Originally Posted by SSPKris View Post
This is going to be an informative and straight forward transmission build for everyone to follow. We will document the entire build over a 2-4 week period. Trinity Auto will be doing the initial removal of the transmission within the next week. Our goal on this build is 1000ft/lb. torque. We will be installing some very new products that are not yet available. We have been doing some extensive testing behind the scenes.

We will also show you how to do some of this preventative maintenance to save yourself some dollars from the dealerships.

SSP
S63 powered X's are slipping around 670hp, do you have anything for the 6HP26S?
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      08-30-2016, 05:51 AM   #11
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^^^LOTS of pictures!
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      08-30-2016, 08:29 AM   #12
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It would be ok if this gets tagged with DCTPorn. Just sayin'.
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      08-30-2016, 09:19 AM   #13
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Quote:
Originally Posted by m5james View Post
S63 powered X's are slipping around 670hp, do you have anything for the 6HP26S?
Sorry we are not building automatic transmissions at this time. This transmission was designed for 440 ft/lbs. of torque.

SSP
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      08-30-2016, 09:23 AM   #14
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      08-30-2016, 03:53 PM   #15
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      08-30-2016, 05:11 PM   #16
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Looking forward to this

Ram look for an email from me tomorrow w/ the file. Sounds like I need to raise max clutch torque again
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      08-30-2016, 05:53 PM   #17
allmotor_2000
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Quote:
Originally Posted by Mike Benvo View Post
Looking forward to this

Ram look for an email from me tomorrow w/ the file. Sounds like I need to raise max clutch torque again
Thx - need to raise the bar
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      08-31-2016, 11:35 AM   #18
allmotor_2000
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Step #1 - Get the car to Trinity Autosport and in the capable hands of Joe Yang. Tow company just picked her up...
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      08-31-2016, 12:38 PM   #19
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Looks like the ultimate sleeper !
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      08-31-2016, 01:19 PM   #20
allmotor_2000
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Quote:
Originally Posted by TheHouseWon View Post
Looks like the ultimate sleeper !
She is bone stock... lol
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      08-31-2016, 08:44 PM   #21
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Looking forward to see this!!!! Best of luck guys, and thanks for being the pioneers, putting the time, and effort in order to make it easier for all of us!
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      08-31-2016, 10:21 PM   #22
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Ram, did your DTC give up, blow up, start slipping or is this just ready for the next push in the power war I think you are allready wining?
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