Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

DCT transmission

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Old Aug 6, 2020 | 12:32 PM
  #81  
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That transmission should have a 0.67 7th and 1:1 5th. Is it the 70SG?
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Old Aug 14, 2020 | 11:53 AM
  #82  
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ive seen them mention an e-clutch pedal like a dbw throttle. Does anyone know more about where/how to get one? I did some looking around and didnt really find much.
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Old Aug 14, 2020 | 12:05 PM
  #83  
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I believe the DGK and HTG can use an analog input for the clutch. You could use a DBW throttle pedal to replace the clutch pedal.
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Old Aug 14, 2020 | 12:37 PM
  #84  
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Originally Posted by TrendSetter
ive seen them mention an e-clutch pedal like a dbw throttle. Does anyone know more about where/how to get one? I did some looking around and didnt really find much.
Simple, stick an analogue sensor onto your existing pedal, and it seems they just use some sort of spring to give you the feel of a clutch pedal.

Presumably you already have a clutch pedal, so that part is sorted. Whether you use some sort of linear sensor or other, depends what is easiest for you to fit.
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Old Aug 18, 2020 | 06:00 PM
  #85  
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ok, thats what i was figuring. need to find some sort of linear sensor and a way to make it 'feel' like a clutch.
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Old Aug 18, 2020 | 06:07 PM
  #86  
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Originally Posted by TrendSetter
ok, thats what i was figuring. need to find some sort of linear sensor and a way to make it 'feel' like a clutch.
There are lever action, rotary 5v sensors available. Check digikey or Mouser.
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Old Aug 18, 2020 | 06:11 PM
  #87  
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Some mercedes cars used a linear sensor for their throttle pedal...not sure which models though.

Or others seem to just use a regular throttle position type sensor and link it to the pedal pivot.. I guess an old valve spring in place of a master would be a decent spring for feel. You only need around 25mm of travel up there, so shouldnt be too hard to find a spring ?

https://www.facebook.com/hfracing/videos/pcb.421866351759421/10162321702720464/?type=3&theater&ifg=1
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Old Aug 18, 2020 | 06:24 PM
  #88  
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Originally Posted by Project GatTagO
There are lever action, rotary 5v sensors available. Check digikey or Mouser.
There are many lever action ride height sensors on modern cars too, usually for headlight level compensation etc. Or for fancy suspension ****.

Plenty of options
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Old Oct 7, 2020 | 04:15 PM
  #89  
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I test fit the DCT into my turbo LS powered C3 vette. I does fit with no change required to the tunnel or firewall. It's a little closer to the firewall than the 4L80e because the adapter plate comes straight back a bit, but nothing is interfering. If I keep raising the DCT until it's forced against the tunnel, the middle, center of the DCT touches first right around where the shifter cable comes through the body.

I should have measured the height of the 4L80E output shaft before I removed it. The DCT output shaft appears to be around the same height, maybe a tad lower, but not enough to create a bad pinion angle.

Now I'm going to fabricate an adapter to the rear trans support. I plan to leave the support in it's current location and build the adapter so it can support either 4L80e or the DCT.



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Old Oct 7, 2020 | 05:13 PM
  #90  
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Looks like the DCT oil pan is a fair bit lower than the engine oil pan ?
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Old Oct 7, 2020 | 09:43 PM
  #91  
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Originally Posted by stevieturbo
Looks like the DCT oil pan is a fair bit lower than the engine oil pan ?
Yeah, I noticed that as well. However, I think the 4L80e oil pan was also a fair bit lower than the engine oil pan (F body pan if I remember correctly). I'll make some measurements.
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Old Oct 8, 2020 | 12:36 AM
  #92  
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Originally Posted by LSswap
Yeah, I noticed that as well. However, I think the 4L80e oil pan was also a fair bit lower than the engine oil pan (F body pan if I remember correctly). I'll make some measurements.
Did some measurements.

Both the 4L80e and the DCT hang lower than the engine.

Turns out both the 4L80e and the DCT oil pans are tapered rather than being at right angles to the engine block. The side near the engine hangs lower on both and tapers up towards the back. The taper on the 4L80e is slightly more aggressive.. The DCT hangs about 3/8" lower at the engine side. That's tolerable.

However, the DCT hangs about 3/4 to 1 inch lower in the back than the 4L80e did. I can't raise the back any more without modifying the tunnel.

I've got decent ground clearance now with the 4L80e so an extra 3/4 to 1" wouldn't kill me, but I'm not happy about it, especially with a plastic oil pan.

Curious how much ground clearance there is in a BMW. Tomorrow I'll drop the Vette back on the ground, with the DCT still up there, and measure the ground clearance.


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Old Oct 8, 2020 | 11:38 AM
  #93  
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I think there is one of the guys on one of the FB pages who make a lower profile aluminium sump for the DCT ? They also make a deeper one too.
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Old Oct 8, 2020 | 05:50 PM
  #94  
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Originally Posted by stevieturbo
I think there is one of the guys on one of the FB pages who make a lower profile aluminium sump for the DCT ? They also make a deeper one too.
The back end of the pan is almost flat, so not much gain from a low profile one in my case.

I dropped the car on the ground and jiggled the suspension. The front of the oil pan can fit a 2x4 under it. The back is about 3/8 too low to fit it. Overall, I'd say the back is about an inch and 1/2 too low. If I raise the back (will need some major tunnel work) the clearance will be good front and back.
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Old Oct 24, 2020 | 06:54 PM
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Please keep this thread going! I'm super interested in how it turns out.
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Old Oct 25, 2020 | 05:24 AM
  #96  
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There are lots of users.

https://www.facebook.com/groups/htgtuning/


https://www.facebook.com/HTGtuning

https://www.facebook.com/groups/334529110493146/

https://www.facebook.com/groups/468655856805445
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Old Nov 12, 2020 | 11:34 AM
  #97  
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Watching this one!!!

Stampede.
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Old Feb 4, 2021 | 07:30 AM
  #98  
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Fantastic work thus far! Any updates coming?
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Old May 15, 2021 | 09:32 PM
  #99  
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The tunnel work to make the DCT fit in the Turbo Vette is not something I'm looking forward to. It's not a question of having a lower profile pan, it's the top of the trans that is interfering with the vettes tunnel. Also, I've really been enjoying the 4L80E and the controller I designed for it at this time in the vette. So I've decided to put the DCT into one of my BMW E30s along with another LS engine.
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Old Jun 13, 2021 | 03:14 PM
  #100  
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AAAAH!!! I had this thread bookmarked waiting for the outcome!
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