Can a check ball cause a rattling sound

[JimP]

I've noticed that when my car is parked between my house and my neighbour's house and it's in reverse, I can hear what sounds like a rattling sound coming from the transmission.

Its definetly not the converter or the tc bolts, it definetely sounds like it's in the valve body but only when in reverse.

It's a dual feed unit using ck's calibration kit. The trans works great otherwise. I've made sure nothing else is loose or rattling, to me it sounds like a check ball. Any ideas?

Thank you!

 

[JimP]

My buddy was over and had a listen, he better describes it like a buzzing sound if that helps.

 

[mikestertwo]

It sounds like the pump. When in reverse all the pressure boost valves are in play increasing line pressure. The pressure regulator valve can make a buzzing sound.

 

[JimP]

It sounds like the pump. When in reverse all the pressure boost valves are in play increasing line pressure. The pressure regulator valve can make a buzzing sound.

I have the .555 boost valve in there now, I have a spare .500

I put it into low manually (I have the stage right Trans brake), no noise when in low 1 just in reverse.

I guess I will switch out the valve and put in the .500 and see. I never really noticed this until I started parking between the houses. My pressure is 275psi in reverse and low 1.

 

[TexasT]

The roll pin that holds the over pressure spring in sometimes rubs that spring and "cuts" a coil off resulting in the overpressure releasing and having a "buzzing" sound. Are you experiencing the vent "spitting" fluid out?

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[JimP]

The roll pin that holds the over pressure spring in sometimes rubs that spring and "cuts" a coil off resulting in the overpressure releasing and having a "buzzing" sound. Are you experiencing the vent "spitting" fluid out?

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No fluid out the vent and Trans is slightly over filled to about the bend on the dipstick.

 

[TexasT]

Still could be the over pressure relief passing the overpressure. The spring holds a ball and if it has too much pressure it could be letting it off causing the buzzing sound. Maybe swapping in the .500 will help.

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[JimP]

Not sure what it was but after quickly tugging the TV cable a few times the buzzing sound is gone. So for now I didn't swap out the valves, time will tell.

 

[TexasT]

If it ain't broke don't fix it. Might have had some "debris" in there and a quick bunch of extra pressure flushed it.

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