Question about 1994 Buick Regal Gran Sport

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1994 Buick Regal "shudders" while driving/ won't always up-shift

'94 Regal with automatic transmission has what appears to be a shudder in the drive train (not a vibration in the chassis). It is noticeable at any speed over 20 mph but is worse near 50 mph. It's not all the time but very frequently. Worse in Drive but it also occurs in 3rd and 2nd gears. Cruise control on/off has no effect.

Maybe related - after accelleration (passing or getting on highway) where transmission downshifts, it doesn't always upshift when returning to a constant speed. Slowing the vehicle or shifting out of Drive into Neutral or 3rd has no impact. After 10 seconds to 2 minutes it may upshift on gear than another delay before getting back to highest gear. Happens at all speeds more frequently at highway speeds. Cruise control on/off has no effect.

Any help is appreciated.

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  • skyiler69 Apr 14, 2009

    hello yes i have the same problem,,my 1993 ford mustang is not getting in overdrive,,is getting worse what can i do,, here is my emaill,, if someone can help,,is apreciated,,skyiler69@hotmail.com

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1 Answer

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  • Buick Master
  • 14,584 Answers

It is a 24 year old vehicle (made in 94), it probably needs to retire :>)

Take it to a transmission specialist rather than a normal garage, as it sounds like a sensor problem. It may also be rubber mountings that have perished, and the engine and transmission are only partially mounted to the chassis.

Posted on Mar 16, 2017

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Posted on Jan 02, 2017

SOURCE: 1993 Buick Le sabre

could possibly be the locking converter selinoed.

Posted on May 21, 2008

capsman
  • 111 Answers

SOURCE: Power Steering pump appears to be leaking but is full????

Just guessing. Could it be a warped brake disk? That would cause vibration. And vibration in steering might conceivably cause splashing out the power steering reservoir. You would know if the disk were warped by a shudder when you brake at hight speeds.

Posted on Jun 19, 2008

mudman4300
  • 33 Answers

SOURCE: Triton V10 Engine Shudders under load

have your fuel system vacuumed out our excursion did it as well the injectors are not at fault it is the fuel lines

Posted on Aug 07, 2008

dgjtex
  • 405 Answers

SOURCE: transmission on 1995 Buick Century, slipping badly

Sir I would first change my filter. When you do you should be able to acertain if anything is wrong by what yuo find in your pan. I think your clutchs are probably bad, but with out being able to scan it I don't have any other ideas. I have been lucky a couple of time before and changing the filter solved my problem. Your car is in limp mode generally you have reverse and second gear. 1st gear and reverse use the same clutches, so I am wondering if maybe you have second gear only!

Posted on Dec 26, 2008

  • 1 Answer

SOURCE: Car shudders when accelerating...

My wife's 02 Audi A4 1,8t had the same problem after talking with Audi (coil pack/spark plugs) we replaced them all and the problem still persisted not to say that won't fix your problem but what I found to be the problem was 3/8 vacuum line (shaped like a S) that comes up on the right hand side between the oil filter and the fire wall that comes from the turbo check valve assembly (its hard to locate and should be done with the engine cool) up to a valve assembly that connects to the intake manifold, what was happening was the hose would become spongy at the bottom (you will have to squeeze the hose from top to bottom to notice the difference) and as the engine heats up it would cause the hose to collapse. Once I replaced the hose and the computer reprogrammed the fuel mixture (about 25 miles of driving) the problem seems to have been correct. Good luck.I had also replaced the turbo check valve about three years ago because of a severe hesitation when you first apply gas (turbo check valve may not be the proper name.) Sorry. Wife Still Loves Her Audi

Posted on Mar 19, 2009

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