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2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-06-2009, 07:39 PM   #11
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today car didn't jerk , it was about 60 out .
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Old 03-06-2009, 07:57 PM   #12
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could the weather play a part in it
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Old 03-06-2009, 10:18 PM   #13
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not sure
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Old 03-07-2009, 12:13 AM   #14
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Ambient temperatures have an affect on fluids and pressures. I believe that the colder the ambient temp is, the more viscous the fluid is, hence lowering line pressures. but then again, Im not sure if that relates to the problem your having. hopefully a gearhead can confirm that.
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Old 03-08-2009, 12:58 AM   #15
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Temp could definitely be the issue. I'm from Minnesota and during the winter i get a harsher 1-2 shift (nothing to extreme). Been doing for most of the winter (its friggen cold here). Recently the temp made it to 52F and it worked fine.
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Old 03-08-2009, 11:52 AM   #16
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i'm thinking thats what it is , is there something that i can use to stop that during the colder months
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Old 03-08-2009, 09:04 PM   #17
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I seem to have better luck with Mobil 1 ATF for helping to remedy some of those types of issues.
It'* viscosity stays more consistent. It doesn't seem to get so thick when it gets cold and doesn't thin out so much when it gets hot. - 2 thumbs!!!
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Old 03-09-2009, 04:52 PM   #18
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seafoam transmission additive. haven't used it in my bonneville but i have in other vehicles and its worked great!
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Old 03-11-2009, 08:21 PM   #19
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I have the same problem on my 01 bonneville with 170000 on it,it will shift fine for days then act up,I did notice the fluid level was alittle above the full mark after driving it for a long time,will take some out soon.
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Old 05-01-2009, 05:47 PM   #20
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Try checking the long-shift adapter.. I had the same proplem, took it to the dealer and they had to replace the long-shift adapter. They had to take out the tranny to do it but the car (2001 sle) shifts smooth as butter now.
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