Sound like converter, John. If you can get it on the road and drive it, once the fluid gets to operating temp. and circulates for awhile, it may free up. All those years sitting may have allowed some light rust from condensation to form or sticky varnish on the bushings. Maybe a can of that thin trans fluid additive would help too. Be very careful as stopping could be a problem. Be ready to shift into neutral at all times. Assuming that it worked fine before it sat, there shouldn't be any direct mechanical problems and with any luck at all it will fix itself. Gary John Compton wrote: > My son has a 55 Desoto that has recently been licensed after 10 years in the > driveway. If the idle is set correctly, the engine stalls when placed in > drive. With the idle set high enough to prevent stalling, the car lurches > when shifted into drive. It wants to idle at 25 mph. > > Is this a torque convertor problem or a transmission problem? The shop > manual wasn't helpful. > > Thanks > > John Compton > Fullerton, CA
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