1999 DeVille, 2002 DeVille
I'd like to see a 4.9 race a 4.6, then see who wins.
Both my parents and I have had several 4.9 cars and the worst thing that has ever happened to any of them is a single water pump replacement on a 1992 Eldo. I guess I simply disagree with the premise that more powerful/more horsepower is necessarily better. Traditionally, Cadillac has always been a LUXURY car, not a performance car, at least not until the past 10-15 years or so.
I think the 4.9 is one of the best engines Cadillac ever made. I am old school, so I suppose my perspective is a little slanted, but if you compare a 4.9 to anything that ever came before it, it absolutely rocks. Great take off power, very good gas mileage and incredible reliability. You would have to go back to the old 425 CID of the late 1970's to find a comparably good quality engine.
That being said, I agree with the comment about the 4T60-E... Mine has been getting worse and worse over the past 12 months.
Why would someone think the 4T60E is a v6 transmission?!? It doesn't matter that most of the GM vehicles using it are with v6 engines. This is a fine transmission with lots of possible applications; the gear ratios on it can be done 12 different ways.
Talking about transmission failures, the problem seems to be mainly in the owners, and not the transmissions. A lot of people perform maintenance to their engines etc. but do not service their transmission until it's too late. Remember, a lot of things can be prevented from happening if there is proper maintenance, regardless of what we're talking about.
The problem is the fact that a failing transmission is more likely to be mentioned by it's owner than one that is 'doing just fine' or has lasted XXX,XXX miles. That, coupled with the assumption that the cads get the exact same trans as the V6 cars creates a huge bias against their reliability.
One person reads about a failure, then posts about it, XXX amount of people read the post and retort the information. A couple cycles later and pretty soon it becomes common "knowledge" then gets circled around the forum for years and years. I wish Mr.B would come back and set some of these rumors straight!
I'm saying, based on the overall quality and design complexity of these cars, the folks responsible for their engineering were probably keen enough to accommodate the extra torque in the design of the 4T60's that were installed in the Cadillacs.Ok so you guys claim there's no problem with the extra 70+ pound feet of torque the V8s make over the V6 version. You say there were changes made to accommodate this increment.
What were the changes they made from the V6 4T60 and the V8 4T60 found in Cadillacs?
Sure. But only if you assume that these 'dummies' simply slapped oldsmobile transmissions onto the Cadillacs.It's just common sense that a transmission made for V6 engines that Cadillac put in their V8s will not be as reliable and durable as if they were to design a transmission from scratch or use a transmission specifically designed for V8s.
I'm saying, based on the overall quality and design complexity of these cars, the folks responsible for their engineering were probably keen enough to accommodate the extra torque in the design of the 4T60's that were installed in the Cadillacs.
Sure. But only if you assume that these 'dummies' simply slapped oldsmobile transmissions onto the Cadillacs.
I would say that it's common sense that these guys would make appropriate changes to accommodate the extra torque.
I dont have proof. But neither do you. We're not GM Powertrain Engineers from the 90's.
So all we have on the table is common sense. That common sense points to the likelihood that these highly educated individuals with vast automotive knowledge and experience would be able to deal with the extra 75lb/ft by making the changes necessary within the transmission to take the torque and avoid a warranty claim.
75lb is a big oversight on behalf of the engineering department. I think Mr. Wagoner would have brought out his firing stick and sent a handful highly paid engineers to the unemployment line if that were the case.
If you ever question the integrity of the folks that made your car nearly two decades ago, and have long forgotten more that you and I will ever know about these cars, read just one chapter of the factory service manual. You will be humbled.