'08 auto transmission
Thread Starter
Race Director
Joined: Mar 2007
Posts: 11,083
Likes: 29
From: Murfreesboro TN
'08 auto transmission
I know I've seen a thread on this, did a search and didn't find what I'm looking for.
What upgrades were done to the '08 auto transmission?
The reason I ask is because I’ve had my ’07 auto transmission in the shop for problems downshifting (lack of) into 1st. Three fixes: 1) replaced solenoid, 2) replaced valve body and 3) add valve body spacer plate.
After the spacer plate addition, the paddle shifts seem quicker and firmer. Just wondering if a spacer plate was one of the ’08 upgrades?
Thanks.
What upgrades were done to the '08 auto transmission?
The reason I ask is because I’ve had my ’07 auto transmission in the shop for problems downshifting (lack of) into 1st. Three fixes: 1) replaced solenoid, 2) replaced valve body and 3) add valve body spacer plate.
After the spacer plate addition, the paddle shifts seem quicker and firmer. Just wondering if a spacer plate was one of the ’08 upgrades?
Thanks.
Last edited by RadarP3C; Jan 22, 2008 at 03:32 PM.
Racer
Joined: Dec 1999
Posts: 470
Likes: 4
From: Big Sky Country Montana
The '08 has tighter shifts...less lag from one gear to the next. How was that done? Sorry, I do not know that, but I do know that it is a nice improvement. My guess would be changes in the valve body.
Safety Car
Joined: Aug 2004
Posts: 4,899
Likes: 0
Still the same trans...software tunning helped a lot though. Shifts are indeed tighter but in a good way. Much more seamless transitioning through the gears. In paddle shift mode, the engine now rev matches when you downshift. For example keeping your foot on the gas going a steady 50mph in 5th down shift into 4-3 and there is no bog because the engine revs are matched to the speed of the wheels spinning...
Le Mans Master
Joined: Feb 2002
Posts: 9,883
Likes: 518
From: Bergen County NJ
Still the same trans...software tunning helped a lot though. Shifts are indeed tighter but in a good way. Much more seamless transitioning through the gears. In paddle shift mode, the engine now rev matches when you downshift. For example keeping your foot on the gas going a steady 50mph in 5th down shift into 4-3 and there is no bog because the engine revs are matched to the speed of the wheels spinning...
Le Mans Master
Joined: Apr 2006
Posts: 5,933
Likes: 13
From: The Beautiful Inland Empire WA.
Burning Brakes
Joined: Oct 2007
Posts: 1,164
Likes: 0
From: Eagle River Wisconsin
St. Jude Donor '08
Drifting
Joined: Sep 2007
Posts: 1,480
Likes: 45
I agree this makes it a much more complete trans, match down revs, I can stand on the brakes and hit the paddles, as I search for the apex, not upsetting the car with downshifts that are not matched
Last edited by From C6ZO62C8; Jan 22, 2008 at 04:53 PM.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Still the same trans...software tunning helped a lot though. Shifts are indeed tighter but in a good way. Much more seamless transitioning through the gears. In paddle shift mode, the engine now rev matches when you downshift. For example keeping your foot on the gas going a steady 50mph in 5th down shift into 4-3 and there is no bog because the engine revs are matched to the speed of the wheels spinning...
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Melting Slicks
Joined: Jun 2007
Posts: 2,081
Likes: 8
From: San Francisco Bay Area California
Are you saying that if you are driving in 3rd gear at 3500 rpm and paddle down to 2cd gear (no foot on the brakes, please) which would bring the revs up to say 4500 rpm....that its a totally smooth and seamless shift? Unlike my 07 where you would feel a jerk and lurch from doing that?
BTW you can put your foot on the brakes at the same time. It's a great way to set up for accelerating out of a tight, slow corner!
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Yup! That's exactly what he's saying. The rev matching is better than any human can do it, because it's perfect every time. It sounds great with the NPP open with the M2W switch too!
BTW you can put your foot on the brakes at the same time. It's a great way to set up for accelerating out of a tight, slow corner!
BTW you can put your foot on the brakes at the same time. It's a great way to set up for accelerating out of a tight, slow corner!
I wanna a '08 tranny to put in my '07 
ps-get rid of those white streaks with 303 yet?
Last edited by siffert; Jan 22, 2008 at 06:00 PM.
Melting Slicks
Joined: Jun 2007
Posts: 2,081
Likes: 8
From: San Francisco Bay Area California
Racer
Joined: Dec 2004
Posts: 328
Likes: 0
From: Duluth ( near Atlanta ) Georgia
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Yup! That's exactly what he's saying. The rev matching is better than any human can do it, because it's perfect every time. It sounds great with the NPP open with the M2W switch too!
BTW you can put your foot on the brakes at the same time. It's a great way to set up for accelerating out of a tight, slow corner!
BTW you can put your foot on the brakes at the same time. It's a great way to set up for accelerating out of a tight, slow corner!
So I heard for the '08 that the lag is improved. So do tell, where are you all paddle shifting at so it actually makes the shift at the redline?
