Hey guys, its been a while, but Bonnie has developed a new sound which is of concern to me because I think it is a transmission issue. Basically I started the car warm at the coffee shop, immediately there was a clicking type sound from under the car. The sound I have determined only happens when the car is in park, neutral, or in gear when adding about 200 RPM with the throttle. The other thing is that when I was troubleshooting the car was parked on a slight downhill, and managed to roll almost 1/4 turn. I get the feeling something is up with the parking pawl or the linkage, any help would be greatly appreciated. I have quit driving the car until i figure this out, and can't really justify big bucks fixes (tranny) but I LOVE THIS CAR!! Help!

Does the clicking increase with the rpm?

The clicking is at its worst in P or D. When in gear it only clicks with very slight throttle input, and diminishes at higher RPM. The clicking also clicks with the speed of the motor, faster on high idle, slower when warm.....when in P or D.

Your reverse reaction drum is about to break! Once it does, you will have no upshifts and no reverse.

If you drop the pan, you may see little chunks of metal. It'* overhaul time.

Reverse reaction drum....for those that are curious and would like to know what it looks like.



And if you want to see more of the 4T60-E...
https://www.gmforum.com/general-gm-chat-88/transmission-pics-those-want-them-updated-239395/

We "lovingly" refer to it as a Stovepipe.

Can you post a picture of a bad one? I don't have one or I would.

Gimme a few more hundred miles, I'm almost due for another swap out.

Hey guys, been busy last couple of days, thanks for the info so far. I am now convinced my detent cable may be the culprit, any tips on removal/install?

You mean the actuator inside the trans that controls the parking pawl? Gonna have to let the trans out a little bit to pull the side pan off.