I've searched the boards but not sure the issue we're having with our 700r4 is the same as others have posted.

Our 34 chevy was running just fine. I made a stop, shut it off, got back in to leave. Had no issues. Got about 2 miles, then it just stopped moving but the rpms were still there. Pulled off the road, shut it off, started it up and it would drive for a bit then just stopped. Tranny seemed a bit low so I added more fluid. Started it up, made 2 laps around the parking loy just fine. Went to leave, stopped again. So we went home and got the trailer. Started it up, backed it up maybe 6 feet, Started halfway up the ramps, stopped. Shut it off, Started again and got it on the trailer.

No issues before all this. Its strange I can shut it off, and right after starting it up I have full gears, then just nothing after a few minutes. Tried revving to see if it would catch but nothing. Thinking it's the governor, but any other suggestions?

 

Not the governor-it just won't upshift when that is not working.Any unusual noises from tranny at idle-growling noise of pump sucking air ? could drop pan and check for loose valve body bolts or any tell-tale debris in the pan.

 

I just started having exact same problem today. Lol. Startup and drive for a few blocks then wont upshift. Come to a stop and every gear is a neutral even reverse (park works though lol). Shut engine off and start back up and trans shifts excellent until u slow down to a crawl then no upshift and then nothing. Restart and good to go. Blah blah blah. Hahahaha
HELP !!!
cheers 🍻

 

Same here, I am having the same.

 

The fluid and filters in these cars are meant to be changed at a regular service interval, some say if the fluid has been in the transmission for a long time leave it, problem with that is conventional fluid breaks down. What you're describing sounds like a plugged filter, shutting off the car lets the sediment drop back down to the bottom of the pan and the trans will work for a couple of minutes before it plugs again, it happened to me. I had a bad rattling noise at idle and when my transmission would shift it would sound like air was being sucked through a tube, slipping out of gear and such. What I did was just buy the duralast filter kit at my local autozone and threw it in, while I was down there I also put in a vette servo I highly recommend it. After that I had a really strong shifting transmission and no more weird problems, band material can clog the filter and cause this hence why I put the vette servo in so the band has more clamping force and less slip when engaging.

 

How is everything going now?