91,000 miles, filter and fluid are fine, modulator replaced, vacuum hard lines clear of obstruction, no vacuum leaks period, and been told 1qt overfull is OK by trans shop. now when approaching a stop, brakes applied,then release brake, ease into throttle and trans momentarily acts like it is in neutral then clunks into 1st. 1st to 2nd , 2nd to 3rd, and 3rd to OD is fine, I am baffled since it doesnt do it all the time. electronic? internal leak? HELP!
92 Buick lesabre 97000 miles, on slow acceleration, @ 40mph going into 4th gear there is a mild chutter, same @ 50mph going into OD mild chutter and when down shifting from OD to 4th. All is when slow acceleration. When I say slow acceleration, I mean I drive like a older senior citizen when everyone behind me is annoyed I don't just donor and go. When I do romp to accelerate quicker, there is no chutter at all. Fluid is good and at perfect level. Any ideas? Great car just wondering the scoop is
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The first thing is to check the transmission fluid level, then check the vacuum modulator located out on the side of the transmission, and be certain that the vacuum line is connected to the vacuum modulator, and that the vacuum line also has no leaks and it is connected to an intake manifold vacuum source. If you remove the vacuum line from the vacuum modulator and if there is any transmission fluid is in the vacuum line then the vacuum modulator is faulty and it will need to be replaced.
If you mean your transmission starts slipping. First thing you should always do. Check your transmission fluid levels, if your transmission fluid is low, use the proper amount of fluid right away. If this takes care of the problem, then I would highly recommend keeping a close eye on your transmission fluid levels from now on. Always keep plenty of Dextron 3 automatic transmission fluid on hand so you can top of the transmission if the dip stick is showing the slightest indication that your getting low. Fluid levels should touch the top line on the dip sticks level indicator. For best result check the transmission fluid levels when you first start the engine up for the day.
If it's been 35.000 miles since your transmission was last serviced, it may be due time to have a transmission flush and filter replacement.
Take care of the problem now, while you have a chance of saving the transmission, so it will not lead to costly replacement.
Check the transmission fluid and see if it's low on fluid. If it is more than one pint low it could cause slippage, With that many miles if you have not done a transmission oil and filter change then you will need to do this first when they pull the pan they can tell if you need to overhaul the transmission. Hope this helps you. The cost for a transmission oil and filter change ranges from $150.00 to $200.00.
There is a vacuum line that is connected to a vacuum modulator on the transmission. The vacuum modulator looks like a tiny inline fuel filter on the right rear of the transmission. Remove the vacuum line from the modulator, if transmission fluid spills out when the rubber hose is removed the modulator is punctured. The engine will **** your transmission fluid through the vacuum line and into the intake system and burn it through combustion. If the modulator is punctured you must have it replaced.
you need to make sure all of the sensors are plug in the transmission and all of the vaccum lines are not loose under the hood and no holes are damage and you made have to adjust the bands in the transmission but if you have done all of this and the problem is still the same here is a place that sells only GM-parts only its schram auto & truck parts # 1800-292-1032