Jerky gear changes - 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 04-29-2004, 05:31 PM   #1
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Default Jerky gear changes

Hi everyone. How are ya al?

I had the car in and had all the mounts changed except the hydralic one in the rear. I checked and topped up tranny fluid. What would cause the gears to change rough? It seems to have helped a bit since the mounts were changed. But its still not smooth. Please sont tell me the tranny is going on me.....Plus going up a steep hill it lost power and didnt want to go fast for me.
Got any ideas smarty pants??????

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Old 04-29-2004, 07:17 PM   #2
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Check the tranny fluid when the car is on.. check level.. and smell it to sniff if it'* burnt or not? What color is it? When was the last time you had a tranny fluid change and filter? does it shift hard in all accelaration? ( i.e. WOT, light throttle.. 1/2 way down on peddle and so on ? )
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Old 04-29-2004, 08:35 PM   #3
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Yes the tranny fluid is in need of a change. It is NOT the color it should be...tis tis tis.....Could it be something as simple as it needing the fluid and filter changed. Does the tranny have a filter too? Im still learnin away here
Its more in town driving light throtle, I can baby the gas and it still thuds when changiing gears.
Does that help more?

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Originally Posted by Drifter420
Check the tranny fluid when the car is on.. check level.. and smell it to sniff if it'* burnt or not? What color is it? When was the last time you had a tranny fluid change and filter? does it shift hard in all accelaration? ( i.e. WOT, light throttle.. 1/2 way down on peddle and so on ? )
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Old 04-29-2004, 10:16 PM   #4
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yes i do believe the tranny has a filter and yes changing the fluid will help
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Old 04-30-2004, 12:26 PM   #5
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Yes there is a tranny filter.. does it do it thru all gears are is it only specific when upshifting from 1-2 or 2-3 or downshifting?
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Old 05-01-2004, 01:27 AM   #6
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the tranny shift points are computer controlled....at least in my 97....there may be a software update available for ur computer to improve shift performance
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Old 05-01-2004, 09:39 PM   #7
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I would get your transmission flushed, which means hooking it up to a machine to flush all the fluid out. If you only drain the fluid out and then fill it again, you are only going to get about 1/3 of the fluid, maybe even less.
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Old 05-01-2004, 09:49 PM   #8
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another method that works is to disconnect a transmision line and start the car and let it pump out...
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Old 05-02-2004, 12:21 PM   #9
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Quote:
Originally Posted by int_53185
another method that works is to disconnect a transmision line and start the car and let it pump out...
Yeah, this mehod may work but if you're not extremely careful, you may do MORE damage than good. I would just drop the pan and replace the filter(a good description for doing this procedure is in the tech info section). Then, about 3 months later, just drop the pan again to drain the xmission but do not replace the filter. Let us know what you do and if your symptoms improve.
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Old 05-02-2004, 12:37 PM   #10
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I agree with Ol' Timer here. That'* a pretty dangerous undertaking by yourself.

My trans was slipping last year. A flush fixed it, but I didn't change my filter at that time. Now I'm getting a harsh 1-2 shift when the trans is cold. Under moderate accelleration, it'll actually chirp the tires when it 'hits gear'. I plan to flush, then drive home and drop the pan and change the filter. I suspect a weak shift solonoid or debris in the solonoid.

Your situation, Kimmers, sounds to me like fluid alone, or at least mostly. Sounds like you're getting alot of TC slip under load. It probably gets worse when it gets warmed up. A flush at the least is in order for you. They typically run about $80 US at any oil change type of business.
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