User not logged in - login - register
Home Calendar Books School Tool Photo Gallery Message Boards Users Statistics Advertise Site Info
go to bottom | |
 Message Boards » » Dual clutch transmissions Page [1]  
arghx
Deucefest '04
7584 Posts
user info
edit post

Has anyone here driven (or owned) one? I'm referring to the kind that are mostly in newer German cars and a couple Japanese models (Evo MR, R35 GT-R). I met a guy over the weekend who has a DCT on his VW R32 and liked it a lot. I've been reading about them and learning how they work, but I haven't had a chance to drive one yet. Here's a vid on the ZF 7 speed which is used in the Porsche 911 I believe http://www.youtube.com/watch?v=cd10wif87Qk

and here's a diagram of the 6 speed Getrag unit used in the Evo

5/26/2011 12:08:16 AM

Ahmet
All American
4279 Posts
user info
edit post

I've yet to own one, but I've driven and instructed in a bunch. I'm a big fan, A+ will buy again, great eBayer!!!!A+++

5/26/2011 1:24:09 AM

TKE-Teg
All American
43409 Posts
user info
edit post

I haven't driven one, but I've read that is is fairly common for these transmission to overheat under track conditions.

5/26/2011 8:52:21 AM

arghx
Deucefest '04
7584 Posts
user info
edit post

Quote :
"I've read that is is fairly common for these transmission to overheat under track conditions."


I'm sure that greatly depends on the application. Modified boosted cars are going to need the most improvement in cooling capability. It's no different than towing with a regular automatic transmission.

5/26/2011 11:03:35 AM

Ahmet
All American
4279 Posts
user info
edit post

The Nissan GTR transmission does overheat on track, however I've personally ridden in a Jetta with the factory DSG and 600hp on track, it did NOT over heat. I've driven a Cayman S and a 997 C2S w/PDK fairly hard on the street w/out issue.

5/26/2011 11:06:37 AM

sumfoo1
soup du hier
41043 Posts
user info
edit post

I will say it again..

the gtr is a fantastic car....


other than its transmission.

DSGs are cool.

that particular application was somewhat fumbled.
the clutch pack just isn't strong enough and when it heats up it looses its ability to hold even more causing it to heat up even more and its just cyclical fail. It needs much heavier springs and kevlar clutches even at factory power-levels. Its almost as though they ended up making way more power with the engine then originally anticipated when the transmission was designed.

Essentially their own launch control heats up the clutches so much that they begin to slip under normal full-throttle conditions.

[Edited on May 26, 2011 at 11:29 AM. Reason : .]

5/26/2011 11:23:53 AM

TKE-Teg
All American
43409 Posts
user info
edit post

^^^I'm commenting off of an article in Road & Track over a year ago when they compared the Evo and Cayman's dual clutch transmission.

The Evo (stock mind you) overheated it's transmission...I can't recall if the Cayman had any issues.

5/26/2011 12:23:13 PM

Colemania
All American
1081 Posts
user info
edit post

Ive driven a gti/r32/a3 with the dual clutch and they're all clearly superior to any auto Ive used before. The shifts are very quick, it makes an auto bearable -- but -- you dont get nearly the satisfaction or control (they still downshift on you). At least for me, who likes manuals but dont see them as a requirement for the DD, they make it a real toss up in preference. If youre driving for fun though, or dont have a lot of traffic, theres still really not a comparison in fun.

5/26/2011 8:32:09 PM

sumfoo1
soup du hier
41043 Posts
user info
edit post

other than stuck in a traffic jam... i really always prefer to row my own boat.

5/26/2011 9:20:22 PM

 Message Boards » The Garage » Dual clutch transmissions Page [1]  
go to top | |
Admin Options : move topic | lock topic

© 2024 by The Wolf Web - All Rights Reserved.
The material located at this site is not endorsed, sponsored or provided by or on behalf of North Carolina State University.
Powered by CrazyWeb v2.39 - our disclaimer.