I have a 1995 Chevrolet K1500 Z71 with a 4L60E. i have recently discovered that it will idle high and shift late and shift really hard when it does, and then will not shift into overdrive, the weird part about this is that it will not happen all the time just maybe every other time i drive it. please help me if you can. thanks
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Do you have a service engine light on? If so the first thing to do would be to check for what codes may be stored.
You can also check for vacuum leaks. A good place for a leak is the TB base gasket. Those start to leak and give a fast idle.
As for the late shifts, just about all you can do is check fluid level. The shifts are computer controled. 93+ trucks have the 4L60E. Not even a TV cable to check adjustment on.
Fix the fast idle and the late shifts issue may go away.
the 4l60e is an electronic 700r4 it will work and shift but you will always have a check engine light on because computer will see no communication with trans mission. there is no way of overcoming this. I would recommend finding the correct transmission to install might cost a little more now but save a lot of aggravation later
I would change the filter and fluid and go from there. sounds like it might be starving for oil but if you can change it yourself and see how dirty the pan is inside with clutch dust or filings. there usually is a magnet in the pan to catch the filings debris be sure to clean it off also nice to know how it is wearing between oil changes
sounds like two problems 1 engine can idle high with vaccum leaks or bad idle air control or maf sensor 2 if trans wont shift in to gear fluid first next would be to tcm or wire connection on trans good luck
do the pin point tests, these start witjh running a trouble code test, autozone and kragen will do this for free, if u haven't had the trans apart then cross out any crossed wiring issues, but I do think you will find a problem with the 2-3 shift solenoid, either the solenoid has failed or the connector has a problem on the outside of the trans.