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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-08-2004, 10:12 PM   #1
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Now that its running well (MAF sensor replcmnt), I am wondering about another trouble with my 87SE. I have a wicked "slide-bump" into 2nd at part throttle. If I go easy on the gas its not bad, also if I boot it, it seems ok. I am being vey optimistic here, but is there any chance the vaccuum modulator is faulty? Hose and conn'* look good. It is clearly a junkyard replacement tranny. Your experiences would be most welcome.
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Old 06-09-2004, 10:14 AM   #2
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Is it only when the Transmission is warming up, or at all part throttle shifts no matter the run time of the car? Because I know exactly what you are talking about, At about 125k my tranny did the same thing, and at 130k the tranny was flushed by a pro, and the filter changed, and the tranny shifts so smooth everywhere in the rpm range [a little rough in the winter, but still a whole lot better than it was].


-justin
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Old 06-09-2004, 09:54 PM   #3
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You might be right, Justin. Most of our driving is short hops. I will evualuate the problem from this perspective. I would be thrilled if a regular service could cure this.Thanks.
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