Question about 1999 Oldsmobile Silhouette

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Transmission acting up but not all the time

For the last 2 years, off and on (mostly in the warmer months) my silhoutte will maybe call it like a buck or something with the transmission when you start out in a low gear at a stop sign or something. Once you get your van to a certain speed it is ok until you slow down again and start going. If you pull over and shut it off and restart it is ok until it does it again. In the winter for about 5 months it did not do it at all. Please help.

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  • Oldsmobile Master
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First run a fault code test on the engine control module to make sure the problem is not in the electronics, if all is ok then the transmission is starting to fail.

Posted on Jun 28, 2017

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Posted on Jan 02, 2017

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SOURCE: bucking, slow acceleration, & shuts off

it can be couple of thing Try a fuel injector cleaner or new fuel injectors.it can be vacuum leak. Engines need a vacuum to run especially at idle which is when your car dies. It could be a stuck EGR.
If the check engine light comes on it will store a code so take it to a shop and pay them to read the codes. This may give you a starting point.

Posted on Jun 29, 2008

  • 321 Answers

SOURCE: transmission

Your vehicle has the 3.4 ltr engine and the 4T65E model transmission,which i have rebuilt many,many of.First,verify the transmission fluid level is FULL,and not low,also verify by pulling the pan,that the filter is in place.If all that checks out,then the problem is internal.For the problem you are describing,there are two areas to address.The first,which can be checked outside the trans with a 0-300 psi gauge is the EPC solenoid.EPC stands for Electronic Pressure Control.It is an electrically controlled solenoid that regulates mainline pressure inside the trans.The OEM (original equipment manufacturer) solenoid is known to be problematic,and erratic,causing your vehicle's symptoms of neutralling out,and slamming back into gear.The other area is the Forward piston inside the Forward/3rd gear input drum.The steel piston gets a ridge worn into it,and when it tries to apply at a stop light upon taking off,the ridge causes the piston to hang up momentarily,and then when it frees up,again,a neutral/slam into gear.Common problem that i have had to address over and over on these transmissions.Good luck.

Posted on Jul 19, 2008

  • 1 Answer

SOURCE: the abs light and traction

please tell me what to do when the abs light and service tractions lights show on my 2004 oldsmobile silouette van

Posted on Dec 30, 2008

  • 1118 Answers

SOURCE: car won't go over 45 mph

does it have a cadalitic converter on the exhaust? if it does could be pluged up and restricting exhaust flow. dosent sound like anything is wrong with transmission. if its got a fuel filter chg. that could be pluged. also chk. vacume advance on distributor might have seazed up and will not advance spark. timming chain maybe? the car is almost 30 years old could be any one of thies i mentoned or all of them.

Posted on Feb 01, 2009

volvo2103
  • 122 Answers

SOURCE: Fixing my 2000 Oldsmobile Silhouette Starter

over time our starters get a flat spot on them from wear. Or the solenoid is starting to go out. The solenoid is an electric switch that mounts on the starter. In my opinion its your starter....

Posted on Feb 01, 2009

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