the trans goes out of o/d after while you turn the key off and on and it will go back into o/d no codes on it and so far whats been done on it r/b trans new converter, new valve body all new cel in the trans,the computer has been replaced and the tps and the brake sens have been tested the car is a 95 olds lss 3.8 */c we are at a loss on this anyone have anything on this and the trans is the right one for the car we checked the numbers with gm on this :(

Dave, mine has been doing this occasionally too, but only when cold. We have aging TC solonoids. They're a bit slow in the morning, and if it doesn't lock up the TC in a specific amount of time, I think the PCM is commanding it to give up so it doesn't burn out the solonoid trying.

Getting old sucks, doesn't it?

Is yours temp-dependent also?

mine dosn't do it till it is hot I had the t/c off and on and it did not make any diff if this is it what is the cure I do not need the t/c I live in phx not much snow down here and is there a way to test it to see if it is the prob on this

When I test drove a 95' LSS */C the trans would jolt whenever i'd touch the gas once the car reached operating temperature. When I shifted the selector into 3 it would get worse. One month later I took that car to a machanic to see if I sould buy it. On the way there I noticed the TC would not lock up. I brought this to the machanics attention and after he looked it over told me that the silinoid had warped due to heat. He said that it may still lock up when its warm but it would take at least a few minutes of driving before it does.

mine goes out of o/d after you drive at highway speeds sometime in 2-3 miles sometimes more the tps was tested with a ohm meter (I did not test it the trans shop did per my request) mine will not come out of o/d till you turn the key off and on I don't know about the tranny getting hot but the little driving being done on it prob cant get it that hot. The tc on the car works ( you can turn it on and off and the light comes on and off and I have tryed to spin the tires and it seems to work

the trans has been repaced new case and the numbers are what is suppost to go in the car It has been all gone though all new parts still drops out of o/d puts up a converter slippege code with 3 diffrent new converters in the car what gives I think I have got a gremlen in the car what do I do I would **** on a spark plug if I thought it would help :(

I wouldn't do anything else until you got a scantool on that car while driving it.

the trans shop had a scan tool on it and drove it came up with nothing

Most trans shops know trannies. And nothing else. Knowing the parameters that prevent TCC lockup is another thing. You need a FSM and scantool, or a member here that has them. Or you need someone familiar with the 3800, not just the trans.