Hello everyone and thanks for taking some time to read my problem. I was driving my car over thanks giving break and it was great. Ran good, idled good, shifts great. And then... I went to drive it to work Monday morning and it wouldn’t shift very well. First and second shift great but going into third will only shift at very high rpms and 4th not at all. It’s an automatic 700r4 and my car is an 87. When I scanned for codes I got 32 and 36 which 32 is egr system failure and 36 is mass air flow burn off. Would either of these cause a shifting issue? I know a little but I always find a way to make myself feel like a novice. Any advice or info would be very appreciated before I go swapping egr valves and solenoids and maf sensors. Because my maf sensor only has about 1000 miles on it. And something that might be useful info is I found an msd coil in my shed, bran new. I swapped it out with the cardone one that came with my distributor. It was a direct fit. I went ahead and swapped it back out and put the cardone one back in and my shifting problem is still present. Did I maybe mess up the distributor modular and would that cause my shifting issue. I looked under my car and nothing was unplugged or melted around the transmission. I did notice I was about a half quart low on tranny fluid so I topped it off and I’m still having issues. I’m not leaking any fluids in huge amounts. I might have a couple slow leaks but I think it’s power steering fluid. But like I said, it drove good one night and then the next morning not so good. What do you guys think??

 

I've got a 96. Out of the blue a couple of weeks ago I started it and had a Service Engine light as well as the ABS light. I shut it off, started it back up. ABS light was out but still had the Service Engine. As I drove home I had the same shifting as you (4L60E). When I got home, I pulled codes and found a TPS issue. I read that when the code is set it also sets the transmission into a mode something like limp. I cleared the code and everything went back to okay.

Doesn't help you, but I imagine one of your code sets actually programs the transmission to shift that way. Once you fix the issue and clear the codes I think you will be fine. Or, like me, perhaps it was a fluke and you just need to clear the codes.

 

I did clear the codes and they came right back after starting the car. As of now I’m going to fix the codes an see where it goes from there but I won’t be able to afford any parts till after Christmas so antill then I’m still open to suggestions. Thanks for your response and I hope your car stays well🤘

 

700R4 is not an electronically controlled transmission like the 4L60E (E for Electronic). Other than Torque Converter Lock up.

Unfortunately, I have to tell you when my 86 T/A's 700R4 was about to give it up, it started hanging in 2nd... only sometimes. 1st to 2nd was fine, but 3rd... well wouldn't go into 3rd and forget OD. Then sometimes all was well. Then after a month or so, it just popped one day and that was the end of it.

Check your detent (or Kick down) cable. Make sure it is still attached and adjusted properly. Plenty of info and YouTube videos out there on it.
Check Fluid level and condition
Does not hurt to drop pan, change fluid, change filter, and inspect what you see and smell. What color was the fluid, does it smell burnt, any particles in it?

 

iv checked all fluids and everything seems normal but my car will shift it just doesn’t go after it shifts. A buddy told me that maybe my passing gear cable slipped and might just have to reset it. I’m going to look tomorrow and see if he is right. But I hope my trans isn’t going out🤞

 

How many miles on the car? Has the trans ever been apart?

 

The odometer is at 97000 but I think she is stuck. It only goes about one click every ten or 15 miles

 

but I personally have never had this transmission apart. It’s Been a project car and it sits a lot but now that I’ve changed the u joints in the back Iv been driving for about a week and then this happens. Iv never had signs of the tranny going out. It’s always been perfect. But I know how those things goes

 

One post you say it won't shift, another post you say it shifts but won't accelerate. I would ask if it's dumping into a higher gear too early - real low RPM and bogging, but in your previous post you say High RPM which sounds like slip. Either case, I would check the fluid, filter, and Detent (Kick Down/Passing/Shifting - has many names) cable. If all is well I would get it to a shop and have it checked out. It's often cheaper to repair things before they break. It will be a good opportunity to put a slightly higher stall and shift kit in there if you do need work. That is unless you have to skill and tools to do it yourself.

 

*hanging my head in shame*

 

As KyleF describes above, you need to tell us which condition exists. Does it shift to third but only at increased revs or does it shift and THEN go to high revs with no increase in speed? If it is the former, checking the TV cable/governor is a starting point. If it is the latter, this is the classic symptom of a 3/4 clutch pack that has left town.

 

my car will shift into third, just has no power once it’s there. I believe I can feel it engage into 3, I just have no power once I’m there unless I’m in high rpms then it will go.

 

when your did this, did you change your tps issue?

 

I forgot I posted in this thread. This happened a couple of more times. Replacing the TPS has taken care of it. So the code was right on the money for this one. But, as pointed out, I have a different transmission.