newby needs help
Yes check the fluid level first IN NEUTRAL with the parking brake set. The reason I empasize in neutral is in the last month I have seen 2 cases where guys didn't know to check it in neutral. One toasted his trans. The other got lucky and filled it and it works fine now.
I know you didn't mention a shift kit so this is for 69340Dart. The Trans-go TF-2 shift improver kit is the only way to go as far as I'm concerned and I have been rebuilding torqueflites for over 20 yrs. The Trans-go kit addresses issues that are short comings on the torqueflite in addition to making it shift better. I've tried most brands of kits through the yrs. and no other kit compares to the Trans-go kit.