Perform shift behavior - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-19-2005, 03:34 PM   #1
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Default Perform shift behavior

I've been thinking about Perform vs Normal shift equipped on SC cars. From what I hear, simply plugging in the switch to an NA car will give you the option, but Perform shift is normal behavior and Normal lowers the shift points.

I'm not convinced it is the same in a SC car. When I have my chip out that alters the behavior, it still seems to hold onto a gear longer before upshift and downshift with less throttle than my brother'* 92 SE, parents 92 Olds 88 and my wife'* 93 SE (now parts car). Now, I'm not talking about WOT or redline here. Redline is redline. I talking about part throttle and throttle lift off. It just doesn't behave the same as normal shift patterns in NA cars. I just feel there is something stock in the SC eprom that doesn't behave the same as NA cars with the switch enabled.
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Old 02-19-2005, 03:39 PM   #2
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ok here is the deal Perfromance shift should be called normal, as the car shifts at the yellow on the tach, normal shift should be called enonomy as it shifts well below the yellow on the tach, and yes cars that are NA, are in a sense in Perfromance shift all the time

Will has done this is his SSEi and his Neighbors SSE
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Old 02-19-2005, 03:40 PM   #3
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How about part throttle work? What'* your thoughts on that?
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Old 02-19-2005, 03:46 PM   #4
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Quote:
Originally Posted by jwikoff99
How about part throttle work? What'* your thoughts on that?
not really sure, I run the car in normal all the time, and I have a chuggle around 40 mph but there is a TSB on my year for the symptoms that my car has....so i dont think that the pod has caused my problems, but it might hang in gear a little longer
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Old 02-19-2005, 03:55 PM   #5
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It sounds to me like you think the buttons only come with supercharged cars, but they were optional on NA as well.

I got me a set of buttons out of a newer SSE and plugged em in to my car, but i can't say that i can tell much difference one way or the other. I have only really played with it on 3-4 upshifts, and at MOST, there is only a 1-2 MPH difference, if any, in shift points under low-mid throttle. I can't tell any difference by watching the analog tach. AT WOT, my car will still shift at red line at in either mode.
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Old 02-19-2005, 03:57 PM   #6
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Hmm, I've never seen one on an NA before.
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Old 02-19-2005, 04:48 PM   #7
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Quote:
Originally Posted by John Deere Boy
It sounds to me like you think the buttons only come with supercharged cars, but they were optional on NA as well.
no the Perf/Nrml buttons were for SC only
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Old 02-19-2005, 05:13 PM   #8
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Our limited knowledge of the function of this option is limited to a swap of my switch pod into a 93 SSE without it. My car shifted the same as performance mode without the switch, and the SSE shifted NORMALLY with the switch on, and retarded with the function on.

So it'* possible that the Eprom function differs.
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Old 02-19-2005, 05:32 PM   #9
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Quote:
Originally Posted by 1993 SLE
Quote:
Originally Posted by John Deere Boy
It sounds to me like you think the buttons only come with supercharged cars, but they were optional on NA as well.
no the Perf/Nrml buttons were for SC only
you got me. now that i think about it, it was an ssei. The sse i got a pod from only had TC&CCR. Sorry for misinfo
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