i have a 01' Z with a 4l60e. i've had a little issue with slow shifts some times but usually runs pretty good. well the other day i was getting on the highway and gunned it as it down shifted in caught weakly and made a loud squealing sound i let off the gas then pressed it again and it shifted fine. well as i drove the rest of the way home it made the same noise for just a split second every once and awhile. well i reversed in my parking spot and parked, a didn't hear any sounds, i revved my engine, oil pressure stayed good and motor sounded great. well i turned it off and came down later to start her up and when i turned the key it made that loud sound similar to when it downshifted a really loud squeal and grinding sound, the starter engages of course but the motor doesn't turn over it just makes that horrible sound. and i tried a couple more times and did it again. is there some kind of clutch in the 4l60e that engages as the starter turns? any ideas, hopefully this will be enough info to get some answers. thanks ya'll.

 

Are you saying it does not move ?

 

yep, it was running fine other than the intermitten sound then i parker her, went to start it and the motor doesn't even turn over. the starter engages but it sounds like something at the back of the motor is grinding and sqealing loud as hell.

 

It may be that your pump has failed due to a flexplate cracking and allowing the converter to abuse the pump.

Remove the starter and the remove the converter bolts, slide the converter as far back into the transmission as you can. Reinstall the starter and see what happens when you try to start it.

MAKE SURE THE CONVERTER IS NOT INTERFERING WITH THE FLEXPLATE BEFORE YOU TRY TO START IT.

g