Dear All, i am located in Germany and 4L60E tranmission shops are rare to find. A needle in the heastack.

I did not drove my Blazer very rarely in wintern time. Now it makes trouble in 4th. gear. Normally @50mls it has about 1800 rpm. When I run at this speed suddenly it ´make bang for ms. and you get scared. It looks like the
drivetrain torque power gets intermittent for some ms.

I think I have lost my overdrive function or it is always engaged. 200rpm drop
is not present anymore.

I have a GM Mongoose Pro. What test shall I ran to identfy what the issue is for this gear shudder.

BR
Bob

 

Dear All,

which solenoid is responsible for a short shutter.

TCC PWM solenoid or the TCC Solenoid.
My idea was to disable the solenoid to identify what path the error come from.

Thank you in advance for your proposals.


Greetings
Bob

 

Maybe this will help you
30 Common 4L60E Transmission Problems & Repair | Charlotte NC