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Unread 12-19-2011, 09:13 PM   #1
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Default Century transmission going out?

Greetings. I'm new to this forum, so thanks for the help in advance. 98 Buick Century Custom, 3.1L V6 - About a week ago started noticing problems - Started when upshifting, i noticed slow, sometimes non-response - RPM's were going up, but car was not responding - only if i really kicked it it would up shift and move the car - took it for a drive tonight, was doing the same thing, and i kicked it down, and nothing - i could not get the car over 50 - 1st gear seems fine from a dead stop, but now it won't even shift out of 1st - it seemed like it got much worse as the car warmed up. Fluid is topped off - any thoughts? Modulator? Or do i need a rebuild/new tranny? Thanks!

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Unread 12-19-2011, 09:20 PM   #2
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Greetings. need a rebuild/new tranny? Thanks!
Truth be told if you have to ask I'm sure you already know the answer. Get a couple of extimates before doing the job as prices can very greatly.
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Unread 12-19-2011, 09:42 PM   #3
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Smell your fluid after you drive it. Does it smell burnt? It should also be a very red color.

How many miles on the car?

From that, it sounds like you need a tranny replacement.
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Unread 12-21-2011, 03:04 PM   #4
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There are only 74K miles on the car - fluid doesn't smell burnt. I actually took the car into a reputable shop yesterday and he said the same thing - that it didn't smell burnt, but also needs replacement. However, he didn't do any type of diagnostic on it but drive it, check for codes, and wiggle some pressure line. No codes, and pressure line was in-tact. Shouldn't there be more to telling if i need a complete replacement? Is it all electronic? Or could there be a vacuum leak of some sort? Modulator? I hate to simply take the word of this one guy, but am torn if I should have a second opinion done. One more bit of info - accelerating very slowly, everything seems to shift fine and I can creep up to speed without slippage. Thanks everyone for the response. I appreciate it!

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Unread 12-21-2011, 03:45 PM   #5
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Does anyone have specs on tranny replacement on this vehicle? I've never done one on a transverse engine but I'd like to tackle it myself. Does the engine need to be lifted to get to it?

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Unread 12-21-2011, 05:13 PM   #6
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Not really. Tranny diagnosis is pretty straight forward. On a 1998 it's controlled electronically but it doesn't really matter.
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Unread 12-21-2011, 08:53 PM   #7
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Originally Posted by PrecisionVision View Post
There are only 74K miles on the car - fluid doesn't smell burnt. I actually took the car into a reputable shop yesterday and he said the same thing - that it didn't smell burnt, but also needs replacement. However, he didn't do any type of diagnostic on it but drive it, check for codes, and wiggle some pressure line. No codes, and pressure line was in-tact. Shouldn't there be more to telling if i need a complete replacement? Is it all electronic? Or could there be a vacuum leak of some sort? Modulator? I hate to simply take the word of this one guy, but am torn if I should have a second opinion done. One more bit of info - accelerating very slowly, everything seems to shift fine and I can creep up to speed without slippage. Thanks everyone for the response. I appreciate it!
You can tell the feeling of clutch slippage pretty easily and the only repair for it is trans rebuild.
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Does anyone have specs on tranny replacement on this vehicle? I've never done one on a transverse engine but I'd like to tackle it myself. Does the engine need to be lifted to get to it?
To pull the trans in that you want to drop the entire front sub frame and then separate the engine and trans. It's the easiest way no a amateur should attempt this at all as this complex and easy to mess up something. Something as simple as not fully engaging the torque converter could cause you to do the job again.
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