I have recently noticed a pretty solid clicking noise when my car gets up to speed from say 10mph to 45 its p bad.. beyond that idk.

I jacked up some of the wheels today and when i turned the front wheels, the noise did not occur.
When i went to turn the rear wheels, the clicking noise happened.

WHen i got under the car and turned the tire with my foot, To me it sounds like a clicking noise just behind the oil pan...

Any ideas as to what it could be?

 

A click to one revolution of the driveshaft?
Multiple clicks to one revolution of driveshaft?
Pop out VSS - Vehicle Speed Sensor - and see if click is still present.
If automatic, could be the parking pawl just barely hitting the ring gear and cable needs adjusting

 

It clicks once per revolution of the drive shaft.

It is an automatic.

 

Status Update...

I took it into a shop to have it inspected.
They called me and said they fixed the issue and that the issue was a big rock in the tire tread.

Which i already knew was incorrect because like i said, I hear the noise when the car is in a drive gear.
When i turn the drive shaft with my hand while the rear wheels jacked up, i hear a sort of clicking noise 1 click per revolution..

It actually sounds like just like what a rock sounds like in the tread of a tire so i understand why they thought that was the issue.

So over the past two days, i have been working on a transmission fluid change.
I put castrol Trans fluid the correct stuff and a bottle of Lucas Automatic Transmission Fluid Conditioner because it clearly states that it:
"Reduces noise and shudder"

I also did a new gasket and filter, cleaned the pan really well with brake cleaner and the gasket went on nice and smooth.

It seems like it might have helped a little bit.. not enough to really tell.

The click is still there...
I've heard that it could be the flex plate? and the the bolts could be rubbing?

When i put in the new engine, i also had them install a new flex plate.. so i'm not sure if that would be the issue...

Also, there were no metal particles in the transmission pan and the transmission shifts just fine. No slips, studders etc.

The drive shaft is hard to turn fast by hand so with it being in a mechanic shop, you can barely hear the click with all hte ratcheting / power tools going on...

They told me they would need to tear the tranny down to take a look inside..
quoted me 2.2$ for r&r 100k mile warranty for a jasper transmission.

I think i will take it to another shop and get a second opinion...
The click sounds just like a rock stuck in a tire,

Any ideas of where i should start etc??

 

Also, just to make sure, i had them replace the front U Joint.
Still the lcicking is there..

 

On earlier model trans, i.e., Powerglide, THM350, & THM400, there is a governor on the output shaft.
Governor consists of weights on a shaft and as the output shaft spins faster, weights react against oil pressure in the valve body for making WOT upshifts.
When traveling slow, the weight going to the end of the shaft will make a click.

With a 1990 model, 4L60e trans, your second opinion shop could remove the tailshaft extension and see what's inside - no need for trans removal - remove d/shaft, support trans by oil pan rail, and remove extension. Reassemble reverse order.

Good luck Flex plate crack would follow engine rpm.
Your click follows driveshaft rpm.

 

i took it to a transmission shop and the mechanic put a stethoscope on the Governor and i turned the driveshaft and the clicking noise sounds like it's coming from right there,
i'm going to pick up a governor today and see how the install goes.

Once again Everett, I appreciate the help! If i knew ya i'd buy ya some beer haha

 

You're welcome.
How does WOT upshifts work? (Wide Open Throttle)
What RPM does the trans upshift?

 

i'm not sure, i will ahve to get back to you on that.
after a month the noise has not gotten worse or better.

 

And i also did a transmission change. I drained all of the fluid. Gave it a new gasket, new filter, also put some of that lucas transmission conditioner. still nothing changed. also replaced the governor in the transmisison.. still hasnt changed. it sounds like it's coming from the governor, idk though.