Need help with 4l60e

[EastTXYukon]

Hey guys I'm having trouble with the overdrive in my 4L60E transmission.

Recently, I've noticed a stuttering/bucking when applying gas while my torque converter is locked up.

All of my gears shift correctly, no issues. But when I lightly apply the accelerator while in OD, I get a bucking/stuttering from my truck. If I mash down on the gas pedal the problem will clear, but lightly applying gas causes the stumbling.

This only occurs when the torque converter is locked up. My TC will lock up at 40 mph. It seems to be worse at lower RPMS.

Is there anyway I can disable the torque converter until I get this problem resolved? I know I can drive in 3rd gear, but I do have 25 miles of highway commute. I prefer not to drive that far running 2600 rpms in 3rd gear.

Thanks for any help or advice you can give.

 

[SunlitComet]

it will be difficult to tun of the TC but you might have a slight misfire under a little extra throttle load.

 

[EastTXYukon]

Thanks for the reply. I did the "press the brake pedal while on the throttle" trick and the TC unlocked and the bucking stopped. So to me that indicates slippage in the TC.

I did notice a small transmission fluid leak in the front right of my truck. Would a small leak in a trans cooler line be enough to cause low pressure? My fluid is good color and full.

 

[SunlitComet]

This is a known problems:...

Torque converter shudder in 4th while lockup is engaged problem goes away when the brake pedal is pressed slightly to unlock converter. Have a shop verify line pressure, and provided no valves in the Torque Converter Control (TCC) hydraulic circuit are worn, replace the torque converter. Lubegard Shudder Fix will at least fix this for awhile. Or try a Transmissionmission flush by a shop that uses BG brand products.