|
|
08-21-2009
I had a 95 grand am with the same tranny, the 4t60e and mine exhibited the condition to where i would come to a stop, but it wouldnt downshift either. It would also randomly neutral while driving, especially while passing someone. I later found out that in those years they had a problem with the valve body machining, one of the valves would wear out prematurely. Im not sure if these are the exact conditions you have, but its a suggestion.
08-21-2009
It sounds like shift solenoid 1 may be acting up, but the speedo problem may point to trouble elsewhere. Are there any stored trouble codes? A bad ground connection could also be causing this problem so i would check that out first. The grounds are often all on eyelets that are on the front lower bellhousing bolt/stud so they are pretty easy to check. Do you have access to a scan tool? This will verify if there is a constant speedo signal going to the pcm or if it is just the dash acting up, it will also show what commanded gear the pcm is telling the trans to be in. This problem is going to take some diag time to figure out. You could also look at the wiring harness section that goes to the trans to make sure it isnt pinched or damaged and also make sure the wires going to the vss arent damaged on the back side of the engine or there is an intermittant short to ground
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
