Question about Chevrolet Lumina APV

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After warming up (about 30-45 minutes), transmission will not downshift into first, causing engine to stall while coming to a stop (or shifting into DRIVE from N or P). After cooling down for 45 minutes to an hour, problem is resolved until engine warms up again.

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Unplug the torgue converter and see if problem persists, what kind of car is it?

Posted on Aug 25, 2010

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unforuntiatly souds like you have a bad transmission. The reason it only does it when it be warmed up is the transmission oil is expanding

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1996 F350 4x4 7.5l Shifts fine when cold. After 30-40 miles tranny sticks in 1st gear while accelarating from stop and will rev to 4500 RPM before slamming into third gear. If you let it rev to approx....


Changing the fluild ( all of it) might fix it if your lucky. Something overheating sounds possible. Any cooling system problem can cause this and cleaning the cooling system and flushing out the transmission cooler in the raditor may go a long way towards fixing your problem. dity raditor and or coolant will cause this problem. I you clean everything real good and then go and drive it and it goes longer but still does it your in for another rebuild. this time put in a new raditor to make sure the transmission lasted as long as it's supposed to. It's possible the throttle pressure was'nt set right and the trans upshifts too early and therefore the transmission gets too hot cause the engine is going too slow to make good transmission pressure and the slipping transmission overheats. again even after corrected it'll still do it as the transmission internal seals are adamaged by heat and it'll need to be rebuilt again.

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Cold auto Transmission won't shift into 3 gear until after driving 1 mile or so (driving at about 35 mgh) pickup then downshifts from 3 to 2nd then back to 3rd a few times untill I get to work (7 miles...


Sounds like a bad speed sensor. Perform an ODBII scan soon. ECU should delay upshift until coolant temp senses warm up. It will not work right unless a signal is present from speed sensor.

May 22, 2017 | 1992 Mitsubishi Mighty Max

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When slowing from highway speed to a stop the


try cleaning or replacing the EGR valve? hope this helps

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Tranny causes engine to stall when tranny warms up


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92 Transport tranny snubs engine upon coming to a stop.


Likely, you ignored the real problem 'till it was too late. (the old "closing the barn door after the horses have run away") The clutches in a transmission are paper thin and do not respond well to heating: any slippage causes internal heat. At this point your only option is to have the unit rebuilt. I know that you won't like this answer, but it's fact.

Apr 09, 2009 | 1992 Pontiac Trans Sport

1 Answer

Trans shifts very hard after 5 minutes of stop and go traffic


A reason for hard shifting could be a problem with many things with various degrees of seriousness. It could be your ATF( automatic transmission fluid) is low or broken down and old. This would cause the hardness and the reason for stop and go traffic effecting it. Another possibility is your transmission is just shot, and the timing gears inside are worn and not properly shifting at the correct RPM causing a **** during shifting.

Some possibilties, not all!

~Lucas

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Sounds like you need the updated engine computer for harsh shifting. Look up under the glove box at the computer. Number should be 89661-02K21 if not, you need the update. It is an 8/80 warranty item.

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