Its hard to explain whats exactly happening.

When the trucks idling at 700 it feels fine but once I push the throttle slightly up to 800-900 rpm.

I get a vibration but 900 rpm and up there's no vibration not sure what causing this.

When I'm driving and i'm coming to a stop around 20-30 mph rpms are around 900 ish when the convert unlocks.

I hear a faint clunking sound.

I'm not sure if this would effect the vibration I feel around 800 rpm, but when I'm driving going through the gears here and there I'll get converter shutter so it'll take a bit longer to lock back up then usually.

What's weird is it only happens when I'm below 1400 rpm's and its trying to shift up.

With tow/haul on it doesn't occur.

I have a Revmax 700 unit with a low stall converter with 5k miles on it and I've been loving the trans.

I will say I've got about 12 4x4 launches through it launching around 8 psi.