High OD transmission RPM's...Need help and info. - Page 2 - 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 05-30-2006, 11:45 PM   #11
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Your tack is off... And seems to be worse at the top end...

But judging what you are going by and describing everything seems fine

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Old 05-30-2006, 11:52 PM   #12
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You shouldn't be able to kick down to 2nd at 80.
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Old 05-31-2006, 04:52 AM   #13
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Quote:
Originally Posted by J Wikoff
You shouldn't be able to kick down to 2nd at 80.
even with 2.84? It can be soooo slow if it doesnt...I am thinking about taking the dash panel off, and seeing if I can turn the needle down some, and do trial and error until it shifts at 5600. I hope that works. Or should I get it scanned first by a scantool to make sure it isnt about 5600?
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Old 05-31-2006, 08:29 AM   #14
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You can't 'fix' the tach. Don't mess with it. Get a scantool on there and find out what'* going on first. There was a topic not long ago about a couple other cars with this issue.
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Old 05-31-2006, 09:01 AM   #15
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I am agreement with wilren get scan tool read let it read some of data. My Bville idles between 700- 1000 it really just depends how cold it is. Those number for those speed vs rpmdont seem way off although shift at 6000 rpm is not right.
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Old 05-31-2006, 09:12 AM   #16
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I agree that the tach probably shouldn't be tampered with, at least in the manner mentioned here. Looking at these RPM'* vs. MPH listed above, I am not too sure those are that far off. They may be about 200RPM higher than what my '93 SE runs, but no more than that. As far as the 6000RPM @ WOT, I can't comment on that. I rarely go above 3500RPM. I just don't get into the throttle that deep.

Did you try tapping the brake while holding @60 MPH or so? If the RPM jumps up when you do this, then the TCC is working.

Good Luck!
John
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Old 05-31-2006, 09:17 AM   #17
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My tach is known to be off by 200rpm, temp is off by at least 5 degrees and the fuel gauge is the furthest from linear.

The gauges are merely a reference.
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Old 05-31-2006, 12:57 PM   #18
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Yeah, I guess I'm not really worried about what the tach shows, I just want to make sure my trans and computer is alright. I also dont want to get horrible gas millage with a slipping trans and stuff. I need to find someone with an OBD1 scantool. I wonder if Autozone has one?
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Old 05-31-2006, 01:18 PM   #19
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Don has one.
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Old 05-31-2006, 01:22 PM   #20
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130 miles south

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