Question about 1984 Buick Riviera

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1984 Buick Riviera: transmission is 'bucking' and started mainly in overdrive. Now it's in every gear (automatic). Sometimes it does not downshift into a lower gear when braking; then have to manually move the gear lever to a lower gear, wait (not giving any gas) and then feel it downshift to continue (sometimes have to stop, put it in park and start again but that's mainly after driving about 1/2 hour highway).

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

chuck943
  • 783 Answers

SOURCE: Hesitation, misfire or "bucking" feeling

you most likely have a coil pack going bad.
This can cause an electrical spike and cause computers to reboot just like your home PC in and electrical storm,that is why the transmission acts as if it does not know which gear to go in.
You need to have someone hook up a scan tool and retrieve the trouble codes and see if there is a miss-fire code stored in memory.

Posted on Apr 03, 2009

frcs68
  • 1605 Answers

SOURCE: 1995 buick park ave bucks/shakes

it may be fuel injector wiring. since you have check the compression and the replaced the injector. it is time to take a look at the injector wires.

Posted on Apr 29, 2009

  • 3 Answers

SOURCE: Transmission Bucks on hills

I have a 1990 Buick LeSabre with the 3800 engine. Recently the engine has began to miss under mild acceleration. It is not just a misfire where the spark plug failed; it is more abrupt.

when the engine idles it almost always acts like it the engine is misfiring and it is like the engine is actually kicking back every nowand then. From inside the car while idling, I can feel the same phenomenon. I kicks!

I am not sure where all of the notorious sensors are located and I not feeling like they are at fault. The only one that I feel could be the culprit is TDC sensor or and anti knock device if it has one. Of course it could be the ignition module, I guess.

What I am thinking is that if this engine had an old fashion distributor, it would be as though a cylinder ignited out of sequence or before the piston reached the point that is near TDC. Could it be probable that the the module allowed the spark to set off another cylinder sporadically? Does this motor have an actual distributor cap? Could there be a short between some terminals?

It is not valves because for short periods of time the "miss" will vanish.

The check engine light is not on!

Posted on Jul 21, 2009

roniecon
  • 6826 Answers

SOURCE: 1992 Buick Lesabre with 43,000 miles occasionally

Sounds like the valves in the valve body are sticking,and maybe a lock up converter.Try this brand ,lube guard,for transmissions,it can be found at napa auto parts,it is the beat,and will most likely fix the problem,it is for transmission shutter.

Posted on Jan 26, 2010

csmock132
  • 4669 Answers

SOURCE: 1995 buick riviera won't shift into overdrive

Do you have a check engine light on?

Posted on Apr 06, 2010

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The factory radios usually have 4 small holes. Two on either side of the front radio panel. There is a tool that you can get from a parts store for just a couple of bucks that you insert into the for holes at the same time.(There are two U shaped tools, one for each side) When you push them in it will release the pin holds and you can slide out the radio.

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My 1985 scottsdale 3/4 4x4 has no power in 3rd gear and will not down shift


check to make sure you have no vacuum leaks. u can use a cheap can of carburator cleaner and spray around the vacuum lines of the truck, if your truck starts idling up and changing, you have a leak then just replace the line. Older GM vehicles rely on Vacuum advances for the transmission and will not shift properly nor downshift if there is a leak. a lot of vehicles rely on vacuum to support many functions, mainly driveability as well as smooth running. there should be a vacuum line that runs near the rear of the transmission. also might want to check transmission fluid for the no power, cause even though you may have power in 1st and 2nd, 3rd gear is your main drive gear unless you have a 700R4 with automatic overdrive and it could be suffering from not enough fluid getting to the bands from the pump. also one more thing, check the downshift linkage cable the runs from the carburator to the transmission, make sure it is working, sometimes you can have a broken cable in the line and not even know it. hope this helps

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These details will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

1996 Buick Riviera Transmission proplems


The problem could be a minor miss-fire since the engine works harder between 40 and 50 mph when in overdrive than in other gears.
I would probably get a second opinion to eliminate the transmission.

Aug 02, 2012 | 1996 Buick Riviera

1 Answer

1989 pathfinder transmission 3spd w/ overdrive works great when first started, then downshifting starts way early, started after alternater wentbad


Do you mean upshifting starts way early? Going from 2nd to 3rd in other words?
Ireally don't know your transmission,but the alternator problem might've possibly spiked and hurt your shifting solenoids in the ******. don-ohio (:^)

Nov 14, 2011 | 1989 Nissan Pathfinder

1 Answer

Truck won't shift like it should. Automatic Transmission. Sometimes it won't downshift unless I put the pedal to the floor, sometimes won't shift into overdrive when it should. A few times it has...


Sounds like your bands are worn out inside tranny, If so will need a overhaul or replacement.Sorry for there is no easy fix on these, Buy wish you the best of luck.

Mar 27, 2011 | Toyota Tacoma Cars & Trucks

1 Answer

1995 buick riviera won't shift into overdrive


Do you have a check engine light on?

Apr 06, 2010 | 1995 Buick Riviera

2 Answers

1992 Buick Lesabre with 43,000 miles occasionally the transmission will shutter when I accelerate and it tries to downshift from overdrive to 3rd gear,


Sounds like the valves in the valve body are sticking,and maybe a lock up converter.Try this brand ,lube guard,for transmissions,it can be found at napa auto parts,it is the beat,and will most likely fix the problem,it is for transmission shutter.

Jan 26, 2010 | 1992 Buick LeSabre

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