A727 3 speed transmission: Slight Vibration in Park and when driving

[moparnut74]

Hello. I get a vibration at certain RPM while the vehicle is in park through the floor of my 74 Barracuda. Feels like it could be something in the torque converter or transmission ?? It will go away at higher speeds & different RPM ranges ?? Please help. Thanks !!

 

[moparleo]

Check the flex plate and flex plate to crank and flex plate to convertor for looseness and/or cracks.

 

[AUSTA]

Hello. I get a vibration at certain RPM while the vehicle is in park through the floor of my 74 Barracuda. Feels like it could be something in the torque converter or transmission ?? It will go away at higher speeds & different RPM ranges ?? Please help. Thanks !!

Has it always been there or did it happen suddenly.

 

[challenger6pak]

I was thinking the same thing, Leo. Also check the engine and transmission mounts.

 

[moparnut74]

Vibration

Check the flex plate and flex plate to crank and flex plate to convertor for looseness and/or cracks.

Okay will do. Thanks !!!

 

[crash520]

I have just been through this with my cuda, the vibration was at its peak around 1800-2000 rpm in park/neutral and whilst driving. turned out to be the alternator. So, first things first, drop the drive belts off and start the engine to see if its still there, if not, its either the Alternator, water pump/fan or Power steering. if it is check your flex plate etc as per the guys above and go from there.

 

[moparnut74]

Okay. Thanks again !!