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4l60/700R4 Transmission chattering

82TexasBurban

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1982 Suburban K10 4x4. 4l60 transmission. Just had a reseal job on the tranny and a new torque converter installed 3 months ago. I will be taking it back to the tranny shop to have them check it out week after next but looking for opinions on here as well.

It made a slight chatter a few weeks ago...it's picked up just this week. It is loud like someone is shaking rocks in a tin can (kind of). It seems to be coming from underneath the truck back towards the transmission but it's very hard to pin point.

When it warms up it really gets to chattering now. The chatter does not seem to speed up or slow down. It will stop chattering when I put on the brakes while moving but start up when I let off.

Tranny fluid is new and it shows full.

It shifts perfect, no changes in how it drives. Just loud chatter! Any ideas? Thanks ahead of time!:confused:
 

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