Urgent trans issue! - Page 5 - 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 01-20-2011, 01:08 AM   #41
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Your sure the car is not going in to 4th. Could it be the torque converter not going in to lock up? If your cruising at 50mph, then hold the gas at that speed and tap the brake. Does the RPM change?
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Old 01-20-2011, 06:07 AM   #42
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I never paid attention to that, I'll try that today and report. It does sound like its shift but when I let off the gas at higher speeds there is a loud,high frequency, low pitched humming that I thought was just road and tire noise until recently. And like i said if im going 50+ and drop it to 3rd the rpm goes from 2k to 2500 and i feel a slight lag but not a huge one.
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Old 01-20-2011, 12:05 PM   #43
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No rpm'* do not drop when i tap the brake at 50+
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Old 01-20-2011, 12:09 PM   #44
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Take a look at this. https://www.gmforum.com/electrical-133/tcc-solenoid-switch-284972/ It'* possible it'* simply your torque converter not going in to lock up.
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Old 01-20-2011, 02:16 PM   #45
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I just went driving again and at 55 i tapped the brakes and the rpm'* jumped a bit
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Old 01-21-2011, 10:25 AM   #46
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Well thanks to a bunch of people in my automotive class last night I've concluded the trans is fine and the cv axles need to be replaced (hence humming) and also the ball joins (Hence knocking when turning)
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Old 01-21-2011, 10:29 AM   #47
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Good to hear. And to answer the above post, if the RPMs jumped a few hundred, then the TC is locking.
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Old 01-21-2011, 01:04 PM   #48
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Right i read throough the post you did a couple back about replacing it, thank you for your help.
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Old 01-21-2011, 01:05 PM   #49
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No problem at all. Glad to help.
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