The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Bladeboy1998 · 03-23-2018, 08:14 PM

Okay guys, quick question. I've got a 4l80e in my 03 2500hd, the converter locks fine around town, until you're on the highway and then it will unlock after about 73mph. I read somewhere that the pcm sends a ground signal to the tcc solenoid. Is this correct?

03-23-2018, 08:14 PM	#167
Bladeboy1998 Registered User Join Date: Nov 2014 Location: Toledo Ohio Posts: 520	Re: 4L80E & TH400 Tech. Okay guys, quick question. I've got a 4l80e in my 03 2500hd, the converter locks fine around town, until you're on the highway and then it will unlock after about 73mph. I read somewhere that the pcm sends a ground signal to the tcc solenoid. Is this correct?