727 grinding at idle

[standup303]

Hey all, feel kind of dumb posting this with no real data to give you, but figure it’s worth a shot. TCI 727, not sure on mileage, drivetrain is borderline “tired”, brand new Hughes torque converter, made this grinding with the old TC too though. Makes a grinding noise sitting at idle in all 3 gears ONCE it’s warmed up. Not super noticeable when it’s cold. Zero grinding noise in park or neutral. Can’t really tell if it grinds while driving due to some loud flowmasters. Shifts fine 1-2, a bit slow to shift 2-3 but have read that’s somewhat normal.

Is there anything I can do or check without pulling the transmission apart? If not I’m going to plan on rebuilding it this winter.

 

[coloradohill]

@Duster346 is the guy you want to talk to. He is local.

 

[Heywodja]

^^^^^ WHAT HE SAID! ^^^^^

 

[Murray]

Cracked flex plate.

 

[standup303]

Cracked flex plate.

Spankin new B&M plate. Still did the grinding with stock plate too.

 

[340six]

Bolts have heads hotting shield? Witness marked? Yiu pull it off and look?

 

[standup303]

Bolts have heads hotting shield? Witness marked? Yiu pull it off and look?

This car/727 didn’t come with a sheild

 

[rbkt65]

output shaft bearing.

 

[Duster346]

The output shaft isn't turning at idle.

Is it more of a buzz noise? I've seen that quite often with tci valve bodies.

 

[standup303]

The output shaft isn't turning at idle.

Is it more of a buzz noise? I've seen that quite often with tci valve bodies.

No it’s definitely a grind

 

[Bewy]

My guess is worn bushings such that something [ a drum? ] is wobbling & hitting another component.

 

[oldkimmer]

I found a 5/16s wrench in a tranny 1 time.

 

[A body]

I guess I’d relate “grind” to metal to metal…. any signs in the pan?

 

[Inertia]

My crystal ball needs a good video clip of the noise ,
Or golf clubs in the trunk was common .

 

[RustyRatRod]

So it's 10 days since you posted this. Have you at least dropped the pan?

 

[standup303]

haven’t had a chance to even touch the Dart with work and the kids hockey season cranking up. I’ll get a video this weekend and post it up. Hopefully get time to drop the pan too.