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Cadillac STS/STS-V: What's New for 2007?

1325 messages,  Last post on Apr 08, 2009 at 7:01 AM

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What is this discussion about? Cadillac STS, Cadillac STS-V, Sedan

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#1269 of 1325 Re: 2005 Cadillac STS (Seville replacement) [ctd3rd] by exalteddragon1 Jul 11, 2006 (9:11 am)
Meybe you can post some D3 photos, the one i saw of the STS made the car look horrible. It made it look like someone who had no sence of style put the biggest rims possible on this car to make it look just awful... Like those cheap little compacts you see with 22's on them! Who are these people kidding...   Rims belong on some cars, like Escallade that made a name for itself with the rap and celebrity scene. Good, also many of the GM trucks of even a few years ago had wheels way too small and rims fixed that. This car is one of those that facotry wheels seem to fit it perfectly (I mean the 18's) and the 19's on the V are good b/c the rest of the car was modified to taste. I love chrome, but if they want the STS to be escalladish they will need to give a redesign.   While the car in its present form may lack some 'exicment' I don't think its that bad in its higher trim levels, especially the V.   I thought D3 was some engine tuner or something, taking a car, adding a lip and putting 22's on it does not qualify as world standard parts. If people buy it great, then more sales for Cadillac but so far what I see is unimpressive.   The good news is, that more companies and people seem to be taking notice of Cadillac.
#1272 of 1325 Re: Curious..... [bosshogg] by sweetdts Jul 22, 2006 (1:38 pm)
Replying to: bosshogg (Jul 12, 2005 10:20 am) Can you please email me the DTS overide instructions and code.
#1273 of 1325 TRANSMISSION by jerrymcshane1 Jul 24, 2006 (11:52 am)
The new 07' Silverado/Sierra pics are finally out for the world to see. However, GM has FAILED to include the new automatic 6-speed tranny. They say they do not have enough on inventory to be offered just yet. This transmission has 2 over-drive gears. Which will help reduce engine demand/gas consumption. What tranny is in the 06' STS? Anyone know? Replies to this message: sls002 (Jul 25, 2006 9:55 am) pbeers (Jul 25, 2006 10:55 pm)
#1274 of 1325 TRANNY by jerrymcshane1 Jul 24, 2006 (11:56 am)
I THINK I JUST ANSWERED MY STUPID QUESTION. DriveTrain 5-speed shiftable automatic transmission rear wheel drive Replies to this message: sls002 (Jul 25, 2006 6:38 am)
#1275 of 1325 Re: TRANNY [jerrymcshane1] by sls002 Jul 25, 2006 (6:38 am)
Replying to: jerrymcshane1 (Jul 24, 2006 11:56 am) The 2007 V8 STS will get the new six speed, which was also on the 2006 STS_V.
#1276 of 1325 Re: TRANSMISSION [jerrymcshane1] by sls002 Jul 25, 2006 (9:55 am)
Replying to: jerrymcshane1 (Jul 24, 2006 11:52 am) Highway fuel consumption really depends on the final overall ratio, not how many overdrive ratios there are. There really is no difference in having an overdrive of 0.7:1 with an axle ratio of 3.70:1; or, no overdrive (1:1 high gear) and an axle ratio of 2.56:1. The difference would be in the low gear ratio, but if both transmissions are 4 speeds, then the one with the 1:1 high gear will probably have a lower first gear, perhaps 4:1 instead of 3:1. Replies to this message: pbeers (Jul 25, 2006 10:55 pm)
#1277 of 1325 Re: TRANSMISSION [sls002] by pbeers Jul 25, 2006 (10:55 pm)
Replying to: sls002 (Jul 25, 2006 9:55 am) exactly right, it's all just ratios. The six-speed auto is a must do item for GM though.
#1278 of 1325 STS transmissions by sls002 Jul 27, 2006 (6:53 am)
Some additional thoughts on the transmissions. The old FWD STS had a 3.71:1 axle ratio while the SLS had a 3.11:1 ratio. The overdrive was a 0.68:1 ratio, which gave the base Seville a 26 MPG highway rating. The STS did not get a different rating for some time, but when the Pontiac Bonneville got the northstar with the 3.71:1 gears, it was rated at 24 MPG highway, and I think the STS, DTS were rated at 24 MPG highway too. What this means is that with the high performance gearing, the engine runs about 20% faster, resulting in 2 MPG less on the highway.   The RWD V8 STS has a 2.73:1 base axle ratio, which is rated 26 MPG highway with the 5 speed automatic. The 0.75 overdrive ratio on the 5 speed give an overall final drive ratio of 2.05:1. The new six speed automatic has an overdrive ratio of 0.67:1. With the 3.23:1 axle ratio, the 6 speed has a final overall ratio of 2.16:1, very nearly the same as the 5 speed with the base gearing. Thus, one might expect the highway fuel economy with the 3.23:1 axle ratio to be about 26 MPG. The AWD should improve to, perhaps to 25 MPG highway. The 3.23:1 axle ratio runs the engine about 20% faster than the 2.73:1 axle ratio.   With the 3.23:1 axle ratio and the six speed automatic, the overall low gear ratio is about 13:1, while the 5 speed low gear, with the 3.42:1 axle ratio was 11.7:1. So, with the new transmission, the 3.23:1 axle should produce about the same performance as the 5 speed automatic with the 3.42:1 axle ratio, but still provide better highway fuel economy. Performance with the 1SG package was not much better than the base gears in Car & Driver's testing. I have not seen a magazine test of the 1SF package. It seems to me that the new transmission should come with a new set of axle ratios. The 3.42:1 axle seemed to have way too much power in low gear as it was, however, my guess is that the 3.42:1 gearing was better for the European autobahn where speeds well over 100 MPG are legal. Replies to this message: rayainsw (Jul 31, 2006 9:35 am) sls002 (Jul 31, 2006 8:20 pm)

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