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anyone own a GM 4 cylinder?

T

toph99

Diamond Member
i have a 2000 olds alero 4 cylinder(2.4L twin cam) with a 4 speed automatic. Whenever i floor the gas(say to pass someone) the transmission waits until the rpm is way into the red before it shifts, the redline is at 6000rpm, it shifts around 6500rpm. It'll shift earlier if i let up on the gas of course, but that means i have to watch the tach instead of the road. Does anyone know why it is like this? i woudln't think that they'd make a car with a tranny that lets the engine go into the red before shifting, and i don't have the money for a new engine if it ever happens to crap out on me. Is 6500rpm the actual redline on these engines and the tach is misprinted, or do i just have an odd transmission? if anyone can point me to a place where people might know this would be much appreciated 🙂
 
All GM cars I have driven have a "red zone" then a "hey, this really is the red zone". The first is like some dotted red stuff (like at 6000), then at 6500 is a solid red bar. The vehicle, if you floor it, will go all the way to 6500 before it shifts. Done it on every one I've driven so I'm sure it's ok.
 
My guess is that it's not supposed to do that. First, make sure your tachometer is accurate (with an inexpensive engine analyzer).

I can't imagine that a 2000 still has a kickdown cable (I thought all automatics were computer controlled now), but if it does, that's what needs to be adjusted. I might be wrong about cars not having a kickdown cable, because I've only owned one automatic, and I was fine with it shifting a couple hundred RPM before the redline, so I never attempted to adjust the kickdown cable.

BPJ might be right, too. I've seen some GM's with a "yellowline" and a redline, and some GM's with no red or yellow line on the tach, so you need to depend on the rev limiter or the automatic transmission.
 
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