Originally Posted by Muslimsteel
On my sisters 1992 Buick Regal Custom (has a Series 1 3800 but different tranny than my 94 though right?) she first noticed this like jerking and thought it was going to die or something but anyways i took it out to figure out what could be causing it...after a few drives i've found that when the car gets around 50-55mph and goes into overdrive it starts kinda jerking back, feels like a huge quick gust of wind hits the front, the jerking is really spontaneous...ive checked all the fluids and air filter those are all good...when it was doing that once i switched it to regular drive and it stopped. Also my dad talked to a mechanic about it and he said it might be the overdrive lock? (not sure what that is) and that you can cut a certain wire and it will stop. im not sure if that is the best solution so i thought id see what you guys think. i definitely know its something to do with the OverDrive just not sure what. the engine has 106k on it btw if that is any help. Thanks!
I had this EXACT same issue on a 92 Cutlass (3300 engine). I let it go for a long time and finally one day I simply changed the fuel filter and the car never ran better!! I'd be willing to bet that'* your problem.
I would change the plugs, wires and fuel filter.