4.2 Auto
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Joined: Feb 2004
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From: Kentucky
4.2 Auto
I'm wondering why the automatics' shift points are so low. Mine usually shifts between 17k - 25k rpms. That's normal driving. I'll sometimes shift it to 2nd gear and I can go 55mph w/o any trouble. I think it hovers around 42k rpms. Something like that.
Would a super tuner move the shift points?
Would a super tuner move the shift points?
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Joined: Jul 2003
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From: Scottsdale Az is home, St
42,000 rpms?? Holy crap! Mine only does 5400 RPM redline. You should be running low 7's with that kinda powerband 
Any how, do you drive with OD on? In my M5OD, I can do 57 in 2nd, then shift to hit third, without losing my powerband, so I would imagine that 55 in an AUTO is ok. Yes, a tuner can change your shift points, but please please becareful of changes like that. Ive heard of some problems arising, but we all know every tuner is perfect, and can do anything you want.....
Good luck.
Garrett
Any how, do you drive with OD on? In my M5OD, I can do 57 in 2nd, then shift to hit third, without losing my powerband, so I would imagine that 55 in an AUTO is ok. Yes, a tuner can change your shift points, but please please becareful of changes like that. Ive heard of some problems arising, but we all know every tuner is perfect, and can do anything you want.....
Good luck.
Garrett
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Joined: Aug 2001
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From: Trussville, Alabama
I noticed that real quick after getting the '05 w/ auto as compared to the '00 w/ 5 speed.
I'm quite sure the shift points are set to improve mpg numbers. The lower you keep the rpms, the better the mpg. Performance is sacrificed on the alter of fuel economy. I wish they had a switch so you could select "performance" or "economy".
Often around town, I'll just turn OD off.
I'm already figuring that after warranty, I'll either get a chip, or a tuner, so I can alter the shift points.
FWIW, the mpg numbers are about the same comparing the '05 to the '00.
I'm quite sure the shift points are set to improve mpg numbers. The lower you keep the rpms, the better the mpg. Performance is sacrificed on the alter of fuel economy. I wish they had a switch so you could select "performance" or "economy".
Often around town, I'll just turn OD off.
I'm already figuring that after warranty, I'll either get a chip, or a tuner, so I can alter the shift points.
FWIW, the mpg numbers are about the same comparing the '05 to the '00.
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From: Kentucky
When turning the OD off, what does that actually do? I heard somone say that never turn the OD off except when you tow.
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From: Indiana
It just doesn't allow the truck to go into 5th gear. So you are workin with 4 gears instead of 5
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From: Sin Diego
Originally Posted by homer4.2
It just doesn't allow the truck to go into 5th gear. So you are workin with 4 gears instead of 5
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