Strange tranny problem - 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 03-23-2005, 03:16 PM   #1
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Default Strange tranny problem

This has been going on for a while, but for some reason around 60-70 MPH, if I leave off the gas and just slow down without the brake, the RPMs will slowly creep down below 1K then suddenly downshift into above 3K in the lesser gear. It'* like the tranny is taking it'* sweet time to downshift, or even skipping the downshift into a middle gear, then essentially going from 4 to 2 for instance without hitting 3 first.
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Old 03-26-2005, 04:11 AM   #2
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Wow, fell right to the bottom of the list.
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Old 03-26-2005, 04:47 AM   #3
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Shouldn't be downshifting at all unless you're manually doing it with the shifter?
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Old 03-28-2005, 02:08 AM   #4
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:shock:
It'* an auto. It will shift on it'* own. But the downshift does not seem to be correct in the region of 60-70mph.
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Old 03-28-2005, 02:11 AM   #5
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I know I shift to third at 68-73 at WOT... that'd be your 3-2 shift being a weirdo. Unless it doesn't shift down until you're at like 35mph, it'* not hitting first.
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Old 03-28-2005, 02:30 AM   #6
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ah well, it just seems to drop RPMs too much before it goes back to 2 then. I will ignore it then. 8)
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Old 04-04-2005, 02:50 AM   #7
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i think this is a bonneville thing, my 92 se does that from about 80 or 90. when it drops way down to around to 1000 rpms i give it a quick tap of gas and then the rpms jump back up and stay normal
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