Marty C Posted March 19, 2023 Report Share Posted March 19, 2023 (edited) I have finally got my 1952 Dodge Coronet up and driving fine i decided to give it a shake down cruise it was performing perfectly until close to about 45 minutes of stop and go driving along with a stint on the highway the transmission started having trouble downshifting back to 3rd in drive range and 1 st in power range. the engine would stall sometimes or violently down shift when trying to accelerate sometimes on the trip home it would downshift ok but almost at a stop or again sometimes still stuck in 4th with the jerky downshift if I gave it gas! any ideas ? would lowering the engine idle speed a little more, help? my other idea is a dirty governor! Should I change the transmission oil? Any ideas? thank you Edited March 19, 2023 by Marty C Accidentally hit edit Quote Link to comment Share on other sites More sharing options...
greg g Posted March 19, 2023 Report Share Posted March 19, 2023 https://www.web.imperialclub.info/Repair/Lit/Master/012B/back.htm 1 Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 20, 2023 Report Share Posted March 20, 2023 The Imperial club website has a troubleshooting manual available for download. It explains how to test the system and adjust it. It could be any number of things. In my case bad wiring caused problems for me. Someone had patched the transmission harness and it was a bad job. 1 Quote Link to comment Share on other sites More sharing options...
Tom Skinner Posted March 20, 2023 Report Share Posted March 20, 2023 I had similar situation last summer I did everything. Seems like cleaning the Governor Points and a new Coil did the trick. Check your fuss at the transmission box on the wheel well sometimes they get corroded or bad and don't send a clear message to the carb 1 Quote Link to comment Share on other sites More sharing options...
Marty C Posted March 20, 2023 Author Report Share Posted March 20, 2023 The wiring harness is new as is the interruptor the fuse circuit breaker and resistor is also new so I’m leaning towards the governor it has not been changed or looked at by me since I got the car going to look at it and the points Thank you all will keep you posted Quote Link to comment Share on other sites More sharing options...
Tom Skinner Posted March 20, 2023 Report Share Posted March 20, 2023 Clean points with a soft cloth or pencil eraser - gently. They are silver, soft, and need gentle cleaning Quote Link to comment Share on other sites More sharing options...
Marty C Posted March 20, 2023 Author Report Share Posted March 20, 2023 I assume they are under the cover?so there is no need to remove the governor? Do the weights need to be cleaned and lubricated ? WD40? Quote Link to comment Share on other sites More sharing options...
keithb7 Posted March 20, 2023 Report Share Posted March 20, 2023 You can see the contacts here in this video: https://youtu.be/xtCwHurDRgU 1 Quote Link to comment Share on other sites More sharing options...
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