2008 Cadillac CTS: Rev-Matching Downshifts

2008 Cadillac CTS -- Edmunds.com

The 2008 Cadillac CTS is available with a six-speed manual or six-speed automatic transmission. Our test car has the latter. While most of us around here prefer manual transmissions for the more precise control they provide, the CTS' automatic does earn extra points thanks to its rev-matching downshift ability.

If you place the transmission in manual-shift mode and select a downshift, the transmission's controller will automatically raise engine speed (rpm) to match wheel speed for the lower gear. The result is a smooth downshift, just like a heel-and-toe downshift on a car with a manual transmission.

I've been playing around with the manual-shift mode. Its shifts are reasonably quick and the rev-matching feature is very cool. Of course, rev-matching for an automatic isn't new – some cars from Infiniti, BMW and Mercedes-Benz's AMG come to mind – but having it on the CTS certainly buffs the car's sporting credentials.

A (very) amateur video demonstrating our Cadillac CTS doing it's rev-matching 'thang follows after the jump.

Brent Romans, Senior Automotive Editor

Here's the video:


Posted by Brent May 2, 2008 10:14 am

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Categories: 2008 Cadillac CTS V6 DI


Comments

bimmerjay - May 5, 2008 1:47 pm (#16 Total: 16)  

 
 
The 328i has a unit manufactured by GM in France, but the software is proprietary BMW. The 335i has a ZF 6-speed auto.

vvk - May 5, 2008 6:31 am (#15 Total: 16)  

 
 
As far as I know, the 6 speed auto is the same unit used by BMW in the 3 series.
 
I have tried the one in E90 328i and was extremely impressed. It was by far the best automatic I have ever driven. All othes drive me nuts by shifting at the most illogical time. Not this one. It always seems to know what the correct gear is. Still, when I got back into my manual car, it was like being in heaven.

chavis10 - May 4, 2008 7:07 am (#14 Total: 16)  

 
Philadelphia, PA United States of America  
"And the +/- really needs to be the other way around"
 
BMW and Mazda are the only two makes that use the forward for downshift backward for upshift scheme.

bimmerjay - May 2, 2008 6:07 pm (#13 Total: 16)  

 
 
Yeah what's with the sluggish response? And the +/- really needs to be the other way around.
 
Engine sounds great though.

estreka - May 2, 2008 5:18 pm (#12 Total: 16)  

 
subarctic north - Great Falls, MT  
That delay would drive me nuts. I hear you throwing the shifter and see the engine shifting about a second and a half later. That would frustrate the hell out of me.

70ss454_man - May 2, 2008 3:17 pm (#11 Total: 16)  

 
vancouver, wa  
Friend's '06 X5 4.8is does that
 
It's thrilling

benson2175 - May 2, 2008 1:39 pm (#10 Total: 16)  

 
 
Suby:
 
that Lancia video rocks.

bromans - May 2, 2008 1:00 pm (#9 Total: 16)  

 
California  
Thanks for the clarification - Yes, I was thinking in terms of downshifting durning braking/deceleration. And Suby, totally agree with you about the proper pull back = upshift and push forward = downshift. -- Brent

rayainsw - May 2, 2008 12:47 pm (#8 Total: 16)  

 
Duluth GA United States of America  
2009 CTS:
 
NEW! Steering wheel mounted Paddle Shift Controls
1 - Included and only available in (Y43) 18" (45.7 cm)
Summer Tire Performance

chavis10 - May 2, 2008 12:09 pm (#7 Total: 16)  

 
Philadelphia, PA United States of America  
"Hmm... no paddle shifter?"
 
Standard with FE3 option for 2009 MY.

SubyTrojan - May 2, 2008 11:53 am (#6 Total: 16)  

 
Santa Monica, CA, USA  
Very true, teekay13 (are you Tommy Kendall? j/k). If you're braking at the same time you want to downshift, though, I believe a heel-toe downshift is your only option if you want a rev-matched downshift. That might've been what Brent had in mind. :shrug:
 
If you want to downshift to pass someone, a heel-toe downshift probably wouldn't help. No, "slow-in, fast-out" doesn't apply here, wiseguys/gals. =Þ

teekay13 - May 2, 2008 11:35 am (#5 Total: 16)  

 
 
Suby - I was about to comment on the same thing when I noted the (+) and (-) on the caddy's shifter being all wrong.
 
Also, for what it's worth, a rev-matched downshift on a manual does not require heel-and-toe. But Edmunds LT knows that already.

heydave - May 2, 2008 11:13 am (#4 Total: 16)  

 
 
SubyTrojan - on an unrelated note, thanks for posting that TSB link for the Honda 6-speed. Been fighting with my dealer for three years about that 3rd gear problem.

hondacura4 - May 2, 2008 10:57 am (#3 Total: 16)  

 
 
I really like this car. Cant wait for the test of the CTS-V!

SubyTrojan - May 2, 2008 10:51 am (#2 Total: 16)  

 
Santa Monica, CA, USA  
Nice blog entry, Brent! The rev-matched downshift does indeed seem quick (for a true slushbox) and smooth. :o)
 
When will most automakers get it right and embrace that pulling the lever backward should upshift and pushing it forward should downshift? :( I think that's the most intuitive way for a sequential shifter. Race cars have employed that method for decades.
 
Think about it. If you're braking hard and want to downshift by pulling the shift lever backward against the direction of your inertia which is going forward. It just doesn't make sense.
 
Then again, you can't teach common sense. :shrug:
 
Lancia Delta onboard video of the way things should be:
http://www.youtube.com/watch?v=JC6tTFp4W4o
 
joefrompa, hurry up and finish your CarSpace page so I don't need to communicate to you through here. This Bud's--scratch that--TSB's for you.
 
http://automotivetech.org/at/6spdtsb.pdf

louiswei - May 2, 2008 10:30 am (#1 Total: 16)  

 
Los Angeles, CA  
Hmm... no paddle shifter?






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