97 Bonniville Tranny reverse hesitation - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-12-2012, 08:19 PM   #1
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Unhappy 97 Bonniville Tranny reverse hesitation

Thanks in advance for you time and help. I have a 97 Bonneville SSE. It has 220K miles on it. After sitting overnight, when you put it in reverse it does not move. If I move it down through the gears and then back to reverse it will kick in. The problem only happened a couple of times over about 6 months but now it does it all the time after it sits for a while. Also the other day I came to a rolling stop to turn left and the car acted like it was in neutril for a split second and then went into gear. I took it to a trusted mechanic and he changed the fluid and filter but did not see anything wrong. My guess is it is time for a new tranny, but thought I would make sure there is nothing else to check. I do not plan on putting a tranny in it. It is just not worth it to me.

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Old 01-13-2012, 08:03 AM   #2
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Troy..

When it does the reverse thing, does it grab in the forward gears if you selected them? I'm trying to see if it'* all gears or just reverse.

The input piston and seal are known to wear over time and this causes a leakage. Which in turn could cause you to have no gears.
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Old 01-15-2012, 01:54 AM   #3
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When i put it in reverse to back out of the garage it does it. I move the gear shift to N then D then 2 then 1. Once I get to 1 i can usually feel it pop into first. Then it works just fine. I just made a 6 hour round trip tonight with it and it ran great. It is only after it sits overnight that it does this. So, I guess to answer your question none of the gears I go through work until I get down to first. Thanks for your help.

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Old 01-15-2012, 02:53 PM   #4
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It sat outside last night because we bought a new truck for my wife to drive. It got down to 7 degrees F. Started the car this morning and let it run a couple of minutes. I moved it through all the gears several times before it finally went into gear. I'm assuming the cold weather made the issue worse.
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Old 01-17-2012, 09:32 AM   #5
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That'* likely a seal or something that needs some heat to swell.
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Old 01-17-2012, 07:52 PM   #6
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So is there anything to do other than a rebuild? That is a little over my ability. How long do you think it will keep going? Is there any aditive that would help?
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