4L60E bizarre problem.

[6chevy9]

its a replace deal im pretty sure. im no expert but in my mind the faster it spins is how it engages, like a centrifugal clutch since its not really conected to anything. it just holds fluids and clutches im pretty sure. so somting inetrnal is ****** up i would imagine.

 

[NacIK]

The converter lock-up is controlled by the computer. My 'hoe started to do it once I took off the egr lip off of my throttle blade. I need to get a stock TB and replace it. I want to hook up an circuit and LED to the wire for the TCC to see when it locks up and opens.

 

[90'rado]

Yeah the TCC lockup is controlled by the ECM/PCM. I'd look into the tune first and see if it's okay. It might be time for a new converter. The reason I got away from auto's is there are too many what ifs and open ended possibilities. I rebuilt a 4L60 (700r4) a couple years ago and had to get some tech support along the way ffrom a local guy I know that has built automatics for 25+ years. He told me he still learns new things about autos after all this time! Best of luck to ya, let us know what you figure out.

 

[longbed]

its also controlled by the brake switch thats on the rod of the brake pedal....Had a similar issue with mine, and thats what fixed my issue.....Any lights on on the dash?

 

[arcticryder85]

no lights on the dash. all switches and sensors are working correctly. doubt its a tcm since everything else works properly. leaning toward bad converter. going to leave as is and going to buy a new truck instead of shelling out 1500 bucks on a tranny and converter. i'll just keep this old '94 as a spare truck.
thanks for the help guys!

 

[RSTahoe99]

brand new TC is 100-250 bux depending on where you buy it. IF that is the problem

 

[longbed]

yeah and the switch is 9 bucks IF that is your problem

 

[arcticryder85]

talked to a guru whos been working on chevy trucks for 20 years and he figures its a sticky solenoid valve and/or pressure sender. says its and easy fix just in the pan. I will keep you guys posted if it works or not. might not be soon. buying 2000 yukon denali with 60000 orig miles tomorrow.
thanks guys,
Russ