1952 Chrysler Town and Country acceleration problem at higher speeds in Chrysler Products - General Posted Sunday at 01:07 PM · Edited Sunday at 03:42 PM by keithb7 (see edit history) I have a 1953 with a 265 and fluid drive M6 tranny. Your issue is certainly interesting. I am inclined to think electrical. Some ideas: What about distributor related issues? Your spark plug timing auto adjusts as the engine speeds up. This is done two ways I believe. Centrifugal weights, and vacuum advance. Vacuum taken from the intake manifold. If I can get this straight: when your engine is turned off, the spark timing point plate is retarded by a spring. This allows for a quick, back-fire free engine start up. Then at idle there is a lot of vacuum created in the intake manifold. This vacuum overcomes the points backing plate retarder, spring tension. The vacuum twists the points backing plate, moving the timing ahead. Intake manifold vacuum will decrease as you open the throttle and drive. At this point the engine is now spinning faster. The Distributor shaft turning faster too. That's the point when centrifugal weights take over and advance the spark timing yet further. Engine speed and vacuum readings will vary depending on several factors. Including the throttle position and torque load on the engine. I also am weary about maybe a bad condenser. They do weird things. When they are failing, as dwell time is so incredibly short, a bad condenser may prevent a coil from building up an adequate charge. Causing backfiring possibly. I am doubtful the tranny wiring is related, however it is worth checking. Inspect all wires to and from the tranny at both ends. Check for possible grounds that should not be there. The kick-out switch grounds the coil briefly when you are in 4th gear, under 30 mph. Only when he throttle mashed to the floor. The engine cuts out temporarily, very briefly, as the the coil is grounded. Cutting engine power, removing any load off the tranny input pinion. This allows for smooth sliding clutch gear downshift back to 3rd. Be sure to check all wiring related to this system. The 2 wires to the carb are also related to this system. When the throttle is mashed to the floor, the systems knows that as the carb linkage is open fully, activating a switch on the carb. There are spinning governor points on the side of the tranny. They activate as ground speed increases. However I would be very surprised to learn how that system could somehow effect your engine power cutting out. This spinning set of points usually causes transmission shift problems. Fuel related issues? Maybe. I am doubtful based on your description of the symptoms. What is your fuel line pressure after the pump? A vacuum/fuel pressure dial gauge is a very useful too to have. Ideal for this type of troubleshooting. Be sure to update us and let us know what you find. Good luck.