Trans question for the experts

[rp23g7]

I was thinking about this the other day.

My parents had bought a 64 Dodge Custom 880 brand new. 383/727/8 3/4

Its engine and trans had never been touched or overhauled. it had 188,000 miles lst time i saw it.

Its transmission though, when in neutral, would still produce torque, and the car would creep forward, it would even hold its self on a slight incline.

None of my other cars with 727's in them have ever done this. Wondering why, did it have a really low stall converter.

 

[PDFROGMAN]

I'm gonna guess, just a guess the belvelle spring in the rear clutch drum might be cracked or broken thus keeping the rear clutches partially engaged.
I have opened a few early units and found that spring broken through the years the factory has updated that spring
does it feel sluggish in reverse? slight bind?

 

[rp23g7]

They dont actually have it anymore, sold it when i moved to Ca. in 89.

 

[doug glenn]

I was told by a reputable trans. guru that its because the early low/reverse drum has no drain holes machined in the drum wall to allow fluid to escape. My car (65) tries to creep for a few seconds when I shift from drive or reverse into neutral.