Jump to content

4L60E Trans P0758

Recommended Posts

my 1998 silverado with a 5.7 2wd. After 3 months off not being used, I jumped into my truck, as soon as it went into tcc, it went back into 3rd and the check engine light came on. P0758 code. I changed both of the solenoids(1-2and 3-4) vltage at both 12.0 volts. I can manually ground each solenoid and hear it click. I ohmed out the tan and green wires. at 1.8U to ground. When I first start up truck and put it into gear (od) it will shift all the way to tcc, then it goes back to 3rd. I have to manually shift to 1st at stops but once rolling will not go all the way to tcc. I unpluged the red connector at the ecm under the hood. The bottom row of pins, 11 and 12 going from back to front are the a and b solenoid ground wires. They ohm out at 1.8. I can manually activate each solenoid by removing trans pan and grounding the green wire on a and the tan wire on b. I know they are getting enough voltage. The ground circut is not working right. If anybody can help me, please. All the trans shop say I need a rebuild at $1700.00 plus. I believe it is a ground issues. I went to my locale chevy dealer and the parts man told me the soleniods where a big issue, that is why I changed them, I am $200.00 in the hole and need some straight answers. All the trouble trees tell to look for frayed or chaffed wires at the bell housing. I can find none. The next thing is to change the ecm. I dont want or can afford to keep changing parts. I know some one has bared my pain. please em me at [email protected] and you will be in my eturanal gratatude. I dont know why but some have changed the ignition switch...to solve this problem...????

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...